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Daryadel A, Küng CJ, Haykir B, Sabrautzki S, de Angelis MH, Hernando N, Rubio-Aliaga I, Wagner CA. The calcium-sensing receptor has only a parathyroid hormone-dependent role in the acute response of renal phosphate transporters to phosphate intake. Am J Physiol Renal Physiol 2024; 326:F792-F801. [PMID: 38545651 DOI: 10.1152/ajprenal.00009.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/22/2024] [Accepted: 03/22/2024] [Indexed: 05/04/2024] Open
Abstract
The kidney controls systemic inorganic phosphate (Pi) levels by adapting reabsorption to Pi intake. Renal Pi reabsorption is mostly mediated by sodium-phosphate cotransporters NaPi-IIa (SLC34A1) and NaPi-IIc (SLC34A3) that are tightly controlled by various hormones including parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23). PTH and FGF23 rise in response to Pi intake and decrease NaPi-IIa and NaPi-IIc brush border membrane abundance enhancing phosphaturia. Phosphaturia and transporter regulation occurs even in the absence of PTH and FGF23 signaling. The calcium-sensing receptor (CaSR) regulates PTH and FGF23 secretion, and may also directly affect renal Pi handling. Here, we combined pharmacological and genetic approaches to examine the role of the CaSR in the acute phosphaturic response to Pi loading. Animals pretreated with the calcimimetic cinacalcet were hyperphosphatemic, had blunted PTH levels upon Pi administration, a reduced Pi-induced phosphaturia, and no Pi-induced NaPi-IIa downregulation. The calcilytic NPS-2143 exaggerated the PTH response to Pi loading but did not abolish Pi-induced downregulation of NaPi-IIa. In mice with a dominant inactivating mutation in the Casr (CasrBCH002), baseline NaPi-IIa expression was higher, whereas downregulation of transporter expression was blunted in double CasrBCH002/PTH knockout (KO) transgenic animals. Thus, in response to an acute Pi load, acute modulation of the CaSR affects the endocrine and renal response, whereas chronic genetic inactivation, displays only subtle differences in the downregulation of NaPi-IIa and NaPi-IIc renal expression. We did not find evidence that the CaSR impacts on the acute renal response to oral Pi loading beyond its role in regulating PTH secretion.NEW & NOTEWORTHY Consumption of phosphate-rich diets causes an adaptive response of the body leading to the urinary excretion of phosphate. The underlying mechanisms are still poorly understood. Here, we examined the role of the calcium-sensing receptor (CaSR) that senses both calcium and phosphate. We confirmed that the receptor increases the secretion of parathyroid hormone involved in stimulating urinary phosphate excretion. However, we did not find any evidence for a role of the receptor beyond this function.
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Affiliation(s)
- Arezoo Daryadel
- Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Catharina J Küng
- Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Betül Haykir
- Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Sibylle Sabrautzki
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Martin Hrabĕ de Angelis
- Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, Freising, Germany
- Member of German Center for Diabetes Research, Neuherberg, Germany
| | - Nati Hernando
- Institute of Physiology, University of Zürich, Zürich, Switzerland
| | | | - Carsten A Wagner
- Institute of Physiology, University of Zürich, Zürich, Switzerland
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Schneider S, Kühlbrandt W, Yildiz Ö. Complementary structures of the yeast phosphate transporter Pho90 provide insights into its transport mechanism. Structure 2024:S0969-2126(24)00131-X. [PMID: 38688287 DOI: 10.1016/j.str.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 03/01/2024] [Accepted: 04/03/2024] [Indexed: 05/02/2024]
Abstract
Phosphate homeostasis is essential for all living organisms. Low-affinity phosphate transporters are involved in phosphate import and regulation in a range of eukaryotic organisms. We have determined the structures of the Saccharomyces cerevisiae phosphate importer Pho90 by electron cryomicroscopy in two complementary states at 2.3 and 3.1 Å resolution. The symmetrical, outward-open structure in the presence of phosphate indicates bound substrate ions in the binding pocket. In the absence of phosphate, Pho90 assumes an asymmetric structure with one monomer facing inward and one monomer facing outward, providing insights into the transport mechanism. The Pho90 transport domain binds phosphate ions on one side of the membrane, then flips to the other side where the substrate is released. Together with functional experiments, these complementary structures illustrate the transport mechanism of eukaryotic low-affinity phosphate transporters.
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Affiliation(s)
- Simon Schneider
- Department of Structural Biology, Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany
| | - Werner Kühlbrandt
- Department of Structural Biology, Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany
| | - Özkan Yildiz
- Department of Structural Biology, Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany; Structural Biology Unit, Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany.
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Kim JH, Kroh G, Chou HA, Yang SH, Frese A, Lynn M, Chu KH, Shan L. Perfluorooctanesulfonic Acid Alters the Plant's Phosphate Transport Gene Network and Exhibits Antagonistic Effects on the Phosphate Uptake. Environ Sci Technol 2024; 58:5405-5418. [PMID: 38483317 DOI: 10.1021/acs.est.3c10930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Per- and polyfluoroalkyl substances (PFASs), with significant health risks to humans and wildlife, bioaccumulate in plants. However, the mechanisms underlying plant uptake remain poorly understood. This study deployed transcriptomic analysis coupled with genetic and physiological studies using Arabidopsis to investigate how plants respond to perfluorooctanesulfonic acid (PFOS), a long-chain PFAS. We observed increased expressions of genes involved in plant uptake and transport of phosphorus, an essential plant nutrient, suggesting intertwined uptake and transport processes of phosphorus and PFOS. Furthermore, PFOS-altered response differed from the phosphorus deficiency response, disrupting phosphorus metabolism to increase phosphate transporter (PHT) transcript. Interestingly, pht1;2 and pht1;8 mutants showed reduced sensitivity to PFOS compared to that of the wild type, implying an important role of phosphate transporters in PFOS sensing. Furthermore, PFOS accumulated less in the shoots of the pht1;8 mutant, indicating the involvement of PHT1;8 protein in translocating PFOS from roots to shoots. Supplementing phosphate improved plant's tolerance to PFOS and reduced PFOS uptake, suggesting that manipulating the phosphate source in PFOS-contaminated soils may be a promising strategy for minimizing PFOS uptake by edible crops or promoting PFOS uptake during phytoremediation. This study highlighted the critical role of phosphate sensing and transport system in the uptake and translocation of PFOS in plants.
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Affiliation(s)
- Jun Hyeok Kim
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Gretchen Kroh
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Hsiu-An Chou
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Shih-Hung Yang
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Addison Frese
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Michael Lynn
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
| | - Kung-Hui Chu
- Zachry Department of Civil and Environmental Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Libo Shan
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
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Matsui H, Harada H, Maeda K, Sugiyama T, Fukuchi Y, Kimura N, Nawaly H, Tsuji Y, Matsuda Y. Coordinated phosphate uptake by extracellular alkaline phosphatase and solute carrier transporters in marine diatoms. New Phytol 2024; 241:1210-1221. [PMID: 38013640 DOI: 10.1111/nph.19410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 10/31/2023] [Indexed: 11/29/2023]
Abstract
Marine diatoms express genes encoding potential phosphate transporter and alkaline phosphatase (APase) under phosphate-limited (-P) condition. This indicates that diatoms use high-affinity phosphate uptake system with organic phosphate hydration. The function of molecules playing roles for Pi uptake was determined in this study. Pi uptake and APase activity of two marine diatoms, Phaeodactylum tricornutum and Thalassiosira pseudonana, were monitored during acclimation to -P condition. The transcript levels of Pi transporter were analyzed, and Pi transporters were localized with GFP tagging in diatom cells. KO mutants of plasma membrane solute carrier proteins (SLC34s) or APase were established, and their phenotype was evaluated. Some Na+ /Pi transporter candidates, SLC34s in P. tricornutum and T. pseudonana, increased transcript under -P condition. Whole-cell Pi transport was specifically stimulated by sodium ion but independent of potassium, lithium, or proton. Genome-editing KO of PtSLC34-5 and APase (Pt49678) in P. tricornutum was highly inhibitory for Pi uptake, and KO of TpSLC34-2 was also highly inhibitory for Pi uptake in T. pseudonana. SLC34s and APase were co-expressed under -P conditions in marine diatoms. SLC34s play a major role in the initial acclimation stage of diatom cells to -P condition and APase plays an increasing role in the prolonged Pi-starved condition.
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Affiliation(s)
- Hiroaki Matsui
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Hisashi Harada
- Department of Chemistry and Biotechnology, Tottori University, Tottori, 680-8550, Japan
| | - Kanako Maeda
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Toshiki Sugiyama
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Yohei Fukuchi
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Nanae Kimura
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Hermanus Nawaly
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Yoshinori Tsuji
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
| | - Yusuke Matsuda
- Department of Bioscience, Kwansei Gakuin University, 1 Gakuen Uegahara, Sanda, 669-1330, Hyogo, Japan
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Luo H, Wang X, You C, Wu X, Pan D, Lv Z, Li T, Zhang D, Shen Z, Zhang X, Liu G, He K, Ye Q, Jia Y, Zhao Q, Deng X, Cao X, Song X, Huang G. Telomere-to-telomere genome of the allotetraploid legume Sesbania cannabina reveals transposon-driven subgenome divergence and mechanisms of alkaline stress tolerance. Sci China Life Sci 2024; 67:149-160. [PMID: 37897613 DOI: 10.1007/s11427-023-2463-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/10/2023] [Indexed: 10/30/2023]
Abstract
Alkaline soils pose an increasing problem for agriculture worldwide, but using stress-tolerant plants as green manure can improve marginal land. Here, we show that the legume Sesbania cannabina is very tolerant to alkaline conditions and, when used as a green manure, substantially improves alkaline soil. To understand genome evolution and the mechanisms of stress tolerance in this allotetraploid legume, we generated the first telomere-to-telomere genome assembly of S. cannabina spanning ∼2,087 Mb. The assembly included all centromeric regions, which contain centromeric satellite repeats, and complete chromosome ends with telomeric characteristics. Further genome analysis distinguished A and B subgenomes, which diverged approximately 7.9 million years ago. Comparative genomic analysis revealed that the chromosome homoeologs underwent large-scale inversion events (>10 Mb) and a significant, transposon-driven size expansion of the chromosome 5A homoeolog. We further identified four specific alkali-induced phosphate transporter genes in S. cannabina; these may function in alkali tolerance by relieving the deficiency in available phosphorus in alkaline soil. Our work highlights the significance of S. cannabina as a green tool to improve marginal lands and sheds light on subgenome evolution and adaptation to alkaline soils.
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Affiliation(s)
- Haofei Luo
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiaofei Wang
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- Hainan Yazhou Bay Seed Lab, Sanya, 572025, China
| | - Changqing You
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xuedan Wu
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Duofeng Pan
- Institute of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Zhiyao Lv
- Hainan Yazhou Bay Seed Lab, Sanya, 572025, China
| | - Tong Li
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Dongmei Zhang
- Institute of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Zhongbao Shen
- Institute of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086, China
| | - Xiaodong Zhang
- Shandong Academy of Agricultural Sciences, Jinan, 250100, China
- National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land, Dongying, 257345, China
- Shandong Green Manure Ecological Technology Co., Ltd, Dongying, 257345, China
| | - Guodao Liu
- State Key Laboratory of Tropical Crop Breeding, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Kaixuan He
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- Hainan Yazhou Bay Seed Lab, Sanya, 572025, China
| | - Qingtong Ye
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yajun Jia
- Hainan Yazhou Bay Seed Lab, Sanya, 572025, China
| | - Qinghua Zhao
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xian Deng
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiaofeng Cao
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xianwei Song
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Gai Huang
- State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
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Li Y, Wang X, Zhang H, Ye X, Shi L, Xu F, Ding G. Phosphate Transporter BnaPT37 Regulates Phosphate Homeostasis in Brassica napus by Changing Its Translocation and Distribution In Vivo. Plants (Basel) 2023; 12:3362. [PMID: 37836101 PMCID: PMC10574216 DOI: 10.3390/plants12193362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/19/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023]
Abstract
Inorganic phosphate (Pi) is actively taken up by Pi transporters (PTs) from the soil and transported into the plant. Here, we functionally characterized the Brassica napus gene BnaPT37, which belongs to the PHT1 family. BnaPT37 is a plasma membrane-localized protein containing 534 amino acids. Expression of BnaPT37 increased significantly under Pi deficiency in various tissues, especially in fully expanded leaves. Expression of the β-glucuronidase reporter gene driven by the BnaPT37 promoter showed that BnaPT37 is expressed in the root, stem, calyx, and leaf under Pi deficiency. BnaPT37 can complement a yeast mutant strain defective in five Pi transporters and can restore the growth of the Arabidopsis atpt1/2 double mutant under Pi deprivation. Overexpression of BnaPT37 in rapeseed significantly increased Pi translocation from root to shoot. Moreover, the movement of Pi from fully expanded leaves to new leaves and roots was enhanced in the transgenic lines compared to the wild type. However, the overexpression of BnaPT37 inhibited the flowering time, plant height, and Pi accumulation in seeds. In conclusion, BnaPT37 functions as a plasma membrane-localized Pi transporter and might be involved in Pi translocation from root to shoot and Pi distribution from source to sink in B. napus.
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Affiliation(s)
- Yu Li
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Xue Wang
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Zhang
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiangsheng Ye
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Lei Shi
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Fangsen Xu
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
| | - Guangda Ding
- College of Resources and Environment, Microelement Research Center, Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
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Wei X, Xu X, Fu Y, Yang X, Wu L, Tian P, Yang M, Wu Z. Effects of Soybean Phosphate Transporter Gene GmPHT2 on Pi Transport and Plant Growth under Limited Pi Supply Condition. Int J Mol Sci 2023; 24:11115. [PMID: 37446294 DOI: 10.3390/ijms241311115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 06/28/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
Phosphorus is an essential macronutrient for plant growth and development, but phosphate resources are limited and rapidly depleting due to massive global agricultural demand. This study identified two genes in the phosphate transporter 2 (PHT2) family of soybean by bioinformatics. The expression patterns of two genes by qRT-PCR at leaves and all were induced by low-phosphate stress. After low-phosphate stress, GmPHT2;2 expression was significantly higher than GmPHT2;1, and the same trend was observed throughout the reproductive period. The result of heterologous expression of GmPHT2 in Arabidopsis knockout mutants of atpht2;1 shows that chloroplasts and whole-plant phosphorus content were significantly higher in plants complementation of GmPHT2;2 than in plants complementation of GmPHT2;1. This suggests that GmPHT2;2 may play a more important role in plant phosphorus metabolic homeostasis during low-phosphate stress than GmPHT2;1. In the yeast backfill assay, both genes were able to backfill the ability of the defective yeast to utilize phosphorus. GmPHT2 expression was up-regulated by a low-temperature treatment at 4 °C, implying that GmPHT2;1 may play a role in soybean response to low-temperature stress, in addition to being involved in phosphorus transport processes. GmPHT2;1 and GmPHT2;2 exhibit a cyclic pattern of circadian variation in response to light, with the same pattern of gene expression changes under red, blue, and white light conditions. GmPHT2 protein was found in the chloroplast, according to subcellular localization analysis. We conclude that GmPHT2 is a typical phosphate transporter gene that can improve plant acquisition efficiency.
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Affiliation(s)
- Xiaoshuang Wei
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China
| | - Xiaotian Xu
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China
| | - Yu Fu
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China
| | - Xue Yang
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China
| | - Lei Wu
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China
| | - Ping Tian
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China
| | - Meiying Yang
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China
| | - Zhihai Wu
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China
- National Crop Variety Approval and Characterization Station, Jilin Agricultural University, Changchun 130118, China
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Amenc L, Becquer A, Trives-Segura C, Zimmermann SD, Garcia K, Plassard C. Overexpression of the HcPT1.1 transporter in Hebeloma cylindrosporum alters the phosphorus accumulation of Pinus pinaster and the distribution of HcPT2 in ectomycorrhizae. Front Plant Sci 2023; 14:1135483. [PMID: 37426963 PMCID: PMC10325726 DOI: 10.3389/fpls.2023.1135483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 05/31/2023] [Indexed: 07/11/2023]
Abstract
Ectomycorrhizal (ECM) fungi are associated with the roots of woody plants in temperate and boreal forests and help them to acquire water and nutrients, particularly phosphorus (P). However, the molecular mechanisms responsible for the transfer of P from the fungus to the plant in ectomycorrhizae are still poorly understood. In the model association between the ECM fungus Hebeloma cylindrosporum and its host plant Pinus pinaster, we have shown that the fungus, which possesses three H+:Pi symporters (HcPT1.1, HcPT1.2 and HcPT2), expresses mainly HcPT1.1 and HcPT2 in the extraradical and intraradical hyphae of ectomycorrhizae to transport P from the soil to colonized roots. The present study focuses on the role of the HcPT1.1 protein in plant P nutrition, in function of P availability. We artificially overexpressed this P transporter by fungal Agrotransformation and investigated the effect of the different lines, wild-type and transformed ones, on plant P accumulation, the distribution of HcPT1.1 and HcPT2 proteins in ectomycorrhizae by immunolocalization, and 32P efflux in an experimental system mimicking intraradical hyphae. Surprisingly, we showed that plants interacting with transgenic fungal lines overexpressing HcPT1.1 did not accumulate more P in their shoots than plants colonized with the control ones. Although the overexpression of HcPT1.1 did not affect the expression levels of the other two P transporters in pure cultures, it induced a strong reduction in HcPT2 proteins in ectomycorrhizae, particularly in intraradical hyphae, but still improved the P status of host plant shoots compared with non-mycorrhizal plants. Finally, 32P efflux from hyphae was higher in lines overexpressing HcPT1.1 than in the control ones. These results suggest that a tight regulation and/or a functional redundancy between the H+:Pi symporters of H. cylindrosporum might exist to ensure a sustainable P delivery to P. pinaster roots.
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Affiliation(s)
- Laurie Amenc
- Eco&Sols, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montpellier, France
| | - Adeline Becquer
- Eco&Sols, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montpellier, France
| | - Carlos Trives-Segura
- Eco&Sols, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montpellier, France
| | | | - Kevin Garcia
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, United States
| | - Claude Plassard
- Eco&Sols, Univ Montpellier, CIRAD, INRAE, Institut Agro, IRD, Montpellier, France
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Zou YN, Xu YJ, Liu RC, Huang GM, Kuča K, Srivastava AK, Hashem A, Abd_Allah EF, Wu QS. Two different strategies of Diversispora spurca-inoculated walnut seedlings to improve leaf P acquisition at low and moderate P levels. Front Plant Sci 2023; 14:1140467. [PMID: 36909381 PMCID: PMC9995707 DOI: 10.3389/fpls.2023.1140467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Walnut (Juglans regia) is an important nut tree species in the world, whereas walnut trees often face inadequate phosphorus (P) levels of soil, negatively limiting its growth and yield. Arbuscular mycorrhizal fungi (AMF) can colonize walnut roots, but whether and how AMF promotes walnut growth, physiological activities, and P acquisition is unclear. The present study aimed to evaluate the effects of Diversispora spurca on plant growth, chlorophyll component concentrations, leaf gas exchange, sugar and P concentrations, and expression of purple acid phosphatase (PAP) and phosphate transporter (PT) genes in leaves of J. regia var. Liaohe 1 seedling under moderate (100 μmol/L P) and low P (1 μmol/L P) levels conditions. Three months after inoculation, the root mycorrhizal colonization rate and soil hyphal length were 45.6-53.2% and 18.7-39.9 cm/g soil, respectively, and low P treatment significantly increased both root mycorrhizal colonization rate and soil hyphal length. Low P levels inhibited plant growth (height, stem diameter, and total biomass) and leaf gas exchange (photosynthetic rate, transpiration rate and stomatal conductance), while AMF colonization significantly increased these variables at moderate and low P levels. Low P treatment limited the level of chlorophyll a, but AMF colonization did not significantly affect the level of chlorophyll components, independent on soil P levels. AMF colonization also increased leaf glucose at appropriate P levels and leaf fructose at low P levels than non-AMF treatment. AMF colonization significantly increased leaf P concentration by 21.0-26.2% than non-AMF colonization at low and moderate P levels. Low P treatment reduced the expression of leaf JrPAP10, JrPAP12, and JrPT3;2 in the inoculated plants, whereas AMF colonization up-regulated the expression of leaf JrPAP10, JrPAP12, and JrPT3;2 at moderate P levels, although AMF did not significantly alter the expression of JrPAPs and JrPTs at low P levels. It is concluded that AMF improved plant growth, leaf gas exchange, and P acquisition of walnut seedlings at different P levels, where mycorrhizal promotion of P acquisition was dominated by direct mycorrhizal involvement in P uptake at low P levels, while up-regulation of host PAPs and PTs expressions at moderate P levels.
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Affiliation(s)
- Ying-Ning Zou
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | | | - Rui-Cheng Liu
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - Guang-Ming Huang
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
| | - Kamil Kuča
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Qiang-Sheng Wu
- Tibet Plateau Walnut Industry Research Institute, College of Horticulture and Gardening, Yangtze University, Jingzhou, Hubei, China
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czechia
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10
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Wang S, Xu T, Chen M, Geng L, Huang Z, Dai X, Qu H, Zhang J, Li H, Gu M, Xu G. The transcription factor OsWRKY10 inhibits phosphate uptake via suppressing OsPHT1;2 expression under phosphate-replete conditions in rice. J Exp Bot 2023; 74:1074-1089. [PMID: 36402551 PMCID: PMC9899414 DOI: 10.1093/jxb/erac456] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 11/16/2022] [Indexed: 05/28/2023]
Abstract
Plants have evolved delicate systems for stimulating or inhibiting inorganic phosphate (Pi) uptake in response to the fluctuating Pi availability in soil. However, the negative regulators inhibiting Pi uptake at the transcriptional level are largely unexplored. Here, we functionally characterized a transcription factor in rice (Oryza sativa), OsWRKY10. OsWRKY10 encodes a nucleus-localized protein and showed preferential tissue localization. Knockout of OsWRKY10 led to increased Pi uptake and accumulation under Pi-replete conditions. In accordance with this phenotype, OsWRKY10 was transcriptionally induced by Pi, and a subset of PHOSPHATE TRANSPORTER 1 (PHT1) genes were up-regulated upon its mutation, suggesting that OsWRKY10 is a transcriptional repressor of Pi uptake. Moreover, rice plants expressing the OsWRKY10-VP16 fusion protein (a dominant transcriptional activator) accumulated even more Pi than oswrky10. Several lines of biochemical evidence demonstrated that OsWRKY10 directly suppressed OsPHT1;2 expression. Genetic analysis showed that OsPHT1;2 was responsible for the increased Pi accumulation in oswrky10. Furthermore, during Pi starvation, OsWRKY10 protein was degraded through the 26S proteasome. Altogether, the OsWRKY10-OsPHT1;2 module represents a crucial loop in the Pi signaling network in rice, inhibiting Pi uptake when there is ample Pi in the environment.
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Affiliation(s)
- Shichao Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Tingting Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Min Chen
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Liyan Geng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhaoyang Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaoli Dai
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
- MOA Key Laboratory of Plant Nutrition and Fertilization in Lower-Middle Reaches of the Yangtze River, Nanjing 210095, China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Hongye Qu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
- MOA Key Laboratory of Plant Nutrition and Fertilization in Lower-Middle Reaches of the Yangtze River, Nanjing 210095, China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
| | - Jun Zhang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Huanhuan Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | | | - Guohua Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
- MOA Key Laboratory of Plant Nutrition and Fertilization in Lower-Middle Reaches of the Yangtze River, Nanjing 210095, China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing 210095, China
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11
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An L, Yao X, Yao Y, Cui Y, Bai Y, Li X, Wu K. Cloning, subcellular localization and expression of phosphate transporter gene HvPT6 of hulless barley. Open Life Sci 2023; 18:20220543. [PMID: 37179786 PMCID: PMC10170964 DOI: 10.1515/biol-2022-0543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/06/2022] [Accepted: 12/14/2022] [Indexed: 05/15/2023] Open
Abstract
Deficiency of phosphate (Pi) is one of the main growth-limiting factors for crops. Generally, phosphate transporters play a key role in the uptake of P in the crops. However, current knowledge regarding the molecular mechanism underlying Pi transport is still limited. In this study, a phosphate transporter (PT) gene, designated HvPT6, was isolated from a cDNA library constructed from hulless barley "Kunlun 14." The promoter of HvPT6 showed a large number of elements related to plant hormones. The expression pattern also indicated that HvPT6 was highly induced by low phosphorus, drought, abscisic acid, methyl jasmonate and gibberellin. Phylogenetic tree analysis revealed that HvPT6 belongs to the same subfamily of the major facilitator superfamily as OsPT6 from Oryza sativa. Subcellular localization of HvPT6:GFP using transient expression of Agrobacterium tumefaciens showed the green fluorescent protein signal in the membrane and nucleus of the Nicotiana benthamiana leaves. Overexpressing HvPT6 led to a longer and higher lateral root length and dry matter yield in the transgenic Arabidopsis lines under low Pi conditions, indicating that HvPT6 improves plant tolerance under Pi-deficient conditions. This study will lay a molecular basis for phosphate absorption mechanism in barley and breeding barley with high-efficient phosphate uptake.
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Affiliation(s)
- Likun An
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Xiaohua Yao
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Youhua Yao
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Yongmei Cui
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Yixiong Bai
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Xin Li
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
| | - Kunlun Wu
- College of Agriculture and Forestry Sciences, Qinghai University, Xining810016, P.R. China
- Qinghai Key Laboratory of Hulless Barley Genetics and Breeding, Xining810016, P.R. China
- Qinghai Subcenter of National Hulless Barley Improvement, Xining810016, P.R. China
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12
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Tanifuji K, Shiozaki Y, Koike M, Uga M, Komiya A, Miura M, Higashi A, Shimohata T, Takahashi A, Ishizuka N, Hayashi H, Ichida Y, Ohtomo S, Horiba N, Miyamoto KI, Segawa H. Effects of EOS789, a novel pan- phosphate transporter inhibitor, on phosphate metabolism : Comparison with a conventional phosphate binder. J Med Invest 2023; 70:260-270. [PMID: 37164731 DOI: 10.2152/jmi.70.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
BACKGROUND Inorganic phosphate (Pi) binders are the only pharmacologic treatment approved for hyperphosphatemia. However, Pi binders induce the expression of intestinal Pi transporters and have limited effects on the inhibition of Pi transport. EOS789, a novel pan-Pi transporter inhibitor, reportedly has potent efficacy in treating hyperphosphatemia. We investigated the properties of EOS789 with comparison to a conventional Pi binder. METHODS Protein and mRNA expression levels of Pi transporters were measured in intestinal and kidney tissues from male Wistar rats fed diets supplemented with EOS789 or lanthanum carbonate (LC). 32Pi permeability was measured in intestinal tissues from normal rats using a chamber. RESULTS Increased protein levels of NaPi-2b, an intestinal Pi transporter, and luminal Pi removal were observed in rats treated with LC but not in rats treated with EOS789. EOS789 but not LC suppressed intestinal protein levels of the Pi transporter Pit-1 and sodium/hydrogen exchanger isoform 3. 32Pi flux experiments using small intestine tissues from rats demonstrated that EOS789 may affect transcellular Pi transport in addition to paracellular Pi transport. CONCLUSION EOS789 has differing regulatory effects on Pi metabolism compared to LC. The properties of EOS789 may compensate for the limitations of LC therapy. The combined or selective use of EOS789 and conventional Pi binders may allow tighter control of hyperphosphatemia. J. Med. Invest. 70 : 260-270, February, 2023.
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Affiliation(s)
- Kazuya Tanifuji
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Yuji Shiozaki
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Megumi Koike
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Minori Uga
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Aoi Komiya
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Mizuki Miura
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Ayami Higashi
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Takaaki Shimohata
- Department of Preventive Environment and Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Akira Takahashi
- Department of Preventive Environment and Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Noriko Ishizuka
- Laboratory of Physiology School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Hisayoshi Hayashi
- Laboratory of Physiology School of Food and Nutritional Sciences, University of Shizuoka, Suruga-ku, Shizuoka, Japan
| | - Yasuhiro Ichida
- Research Division, Chugai Pharmaceutical Co., Ltd. Yokohama, Kanagawa, Japan
| | - Shuichi Ohtomo
- Translational Research Division, Chugai Pharmaceutical Co., Ltd. Research Division, Tokyo, Japan
| | - Naoshi Horiba
- Research Division, Chugai Pharmaceutical Co., Ltd. Yokohama, Kanagawa, Japan
| | - Ken-Ichi Miyamoto
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
- Graduate School of Agriculture, Ryukoku University, Ohtsu, Japan
| | - Hiroko Segawa
- Department of Applied Nutrition, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
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13
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Zhao X, Jin Y, Bai F, Cheng Z, Wu W, Pan X. Pseudomonas aeruginosa Phosphate Transporter PitA (PA4292) Controls Susceptibility to Aminoglycoside Antibiotics by Regulating the Proton Motive Force. Antimicrob Agents Chemother 2022; 66:e0099222. [PMID: 36346250 DOI: 10.1128/aac.00992-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic Gram-negative bacterium that causes nosocomial infections in immunocompromised patients. β-lactam and aminoglycoside antibiotics are commonly used in the treatment of P. aeruginosa infections. Previously, we found that mutation in a PA4292 gene increases bacterial resistance to β-lactam antibiotics. In this study, we demonstrated that mutation in PA4292 increases bacterial susceptibility to aminoglycoside antibiotics. We further found enhanced uptake of tobramycin by the ΔPA4292 mutant, which might be due to an increase of proton motive force (PMF). Sequence analysis revealed PA4292 is homologous to the Escherichia coli phosphate transporter PitA. Mutation of PA4292 indeed reduces intracellular phosphate concentration. We thus named PA4292 as pitA. Although the PMF is enhanced in the ΔpitA mutant, the intracellular ATP concentration is lower than that in the isogenic wild-type strain PA14, which might be due to lack of the ATP synthesis substrate phosphate. Overexpression of the phosphate transporter complex genes pstSCAB in the ΔpitA mutant restores the intracellular phosphate concentration, PMF, ATP synthesis, and aminoglycosides resistance. In addition, growth of wild-type PA14 in a low-phosphate medium resulted in higher PMF and aminoglycoside susceptibility compared to cells grown in a high-phosphate medium. Overall, our results demonstrate the roles of PitA in phosphate transportation and reveal the relationship between intracellular phosphate and aminoglycoside susceptibility.
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14
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Hao DL, Zhou JY, Huang YN, Wang HR, Li XH, Guo HL, Liu JX. Roles of plastid-located phosphate transporters in carotenoid accumulation. Front Plant Sci 2022; 13:1059536. [PMID: 36589064 PMCID: PMC9798012 DOI: 10.3389/fpls.2022.1059536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Enhanced carotenoid accumulation in plants is crucial for the nutritional and health demands of the human body since these beneficial substances are acquired through dietary intake. Plastids are the major organelles to accumulate carotenoids in plants and it is reported that manipulation of a single plastid phosphate transporter gene enhances carotenoid accumulation. Amongst all phosphate transport proteins including phosphate transporters (PHTs), plastidial phosphate translocators (pPTs), PHOSPHATE1 (PHO1), vacuolar phosphate efflux transporter (VPE), and Sulfate transporter [SULTR]-like phosphorus distribution transporter (SPDT) in plants, plastidic PHTs (PHT2 & PHT4) are found as the only clade that is plastid located, and manipulation of which affects carotenoid accumulation. Manipulation of a single chromoplast PHT (PHT4;2) enhances carotenoid accumulation, whereas manipulation of a single chloroplast PHT has no impact on carotenoid accumulation. The underlying mechanism is mainly attributed to their different effects on plastid orthophosphate (Pi) concentration. PHT4;2 is the only chromoplast Pi efflux transporter, and manipulating this single chromoplast PHT significantly regulates chromoplast Pi concentration. This variation subsequently modulates the carotenoid accumulation by affecting the supply of glyceraldehyde 3-phosphate, a substrate for carotenoid biosynthesis, by modulating the transcript abundances of carotenoid biosynthesis limited enzyme genes, and by regulating chromoplast biogenesis (facilitating carotenoid storage). However, at least five orthophosphate influx PHTs are identified in the chloroplast, and manipulating one of the five does not substantially modulate the chloroplast Pi concentration in a long term due to their functional redundancy. This stable chloroplast Pi concentration upon one chloroplast PHT absence, therefore, is unable to modulate Pi-involved carotenoid accumulation processes and finally does affect carotenoid accumulation in photosynthetic tissues. Despite these advances, several cases including the precise location of plastid PHTs, the phosphate transport direction mediated by these plastid PHTs, the plastid PHTs participating in carotenoid accumulation signal pathway, the potential roles of these plastid PHTs in leaf carotenoid accumulation, and the roles of these plastid PHTs in other secondary metabolites are waiting for further research. The clarification of the above-mentioned cases is beneficial for breeding high-carotenoid accumulation plants (either in photosynthetic or non-photosynthetic edible parts of plants) through the gene engineering of these transporters.
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Affiliation(s)
- Dong-Li Hao
- The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-Season Turfgrasses, Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, China
| | - Jin-Yan Zhou
- Department of Agronomy and Horticulture, Jiangsu Vocational College of Agriculture and Forest, Jurong, China
| | - Ya-Nan Huang
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing, China
| | - Hao-Ran Wang
- The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-Season Turfgrasses, Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, China
| | - Xiao-Hui Li
- The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-Season Turfgrasses, Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, China
| | - Hai-Lin Guo
- The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-Season Turfgrasses, Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, China
| | - Jian-Xiu Liu
- The National Forestry and Grassland Administration Engineering Research Center for Germplasm Innovation and Utilization of Warm-Season Turfgrasses, Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing, China
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15
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Cui J, Yang X, Yang J, Jia R, Feng Y, Shen B. A Coccidia-Specific Phosphate Transporter Is Essential for the Growth of Toxoplasma gondii Parasites. Microbiol Spectr 2022; 10:e0218622. [PMID: 36094254 PMCID: PMC9604053 DOI: 10.1128/spectrum.02186-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/26/2022] [Indexed: 12/31/2022] Open
Abstract
Toxoplasma gondii is an obligate intracellular parasite that acquires all necessary nutrients from the hosts, but the exact nutrient acquisition mechanisms are poorly understood. Here, we identified three putative phosphate transporters in T. gondii. TgPiT and TgPT2 are mainly on the plasma membrane, whereas TgmPT is localized to the mitochondrion. TgPiT and TgmPT are widely present and conserved in apicomplexan parasites that include Plasmodium and Eimeria species. Nonetheless, they are dispensable for the growth and virulence of Toxoplasma. TgPT2, on the other hand, is restricted to coccidia parasites and is essential for Toxoplasma survival. TgPT2 depletion led to reduced motility and invasion, as well as growth arrest of the parasites both in vitro and in vivo. Both TgPiT and TgPT2 have phosphate transport activities and contribute to parasites' inorganic phosphate (Pi) absorption. Interestingly, the Pi importing activity of Toxoplasma parasites could be competitively inhibited by ATP and AMP. Furthermore, direct uptake of 32P-ATP was also observed, indicating the parasites' ability to scavenge host ATP. Nonetheless, ATP/AMP import is not mediated by TgPiT or TgPT2, suggesting additional mechanisms. Together, these results show the complex pathways of phosphate transport in Toxoplasma, and TgPT2 is a potential target for antitoxoplasmic intervention design due to its essential role in parasite growth. IMPORTANCE To grow and survive within host cells, Toxoplasma must scavenge necessary nutrients from hosts to support its parasitism. Transporters located in the plasma membrane of the parasites play critical roles in nutrient acquisition. Toxoplasma encodes a large number of transporters, but so far, only a few have been characterized. In this study, we identified two phosphate transporters, TgPiT and TgPT2, to localize to the plasma membrane of Toxoplasma. Although both TgPiT and TgPT2 possess phosphate transport activities, only the novel transporter TgPT2 was essential for parasite growth, both in vitro and in vivo. In addition, TgPT2 and its orthologs are only present in coccidia parasites. As such, TgPT2 represents a potential target for drug design against toxoplasmosis. In addition, our data indicated that Toxoplasma can take up ATP and AMP from the environment, providing new insights into the energy metabolism of Toxoplasma.
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Affiliation(s)
- Jianmin Cui
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
- Key Laboratory of Preventive Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
| | - Xuke Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
- Key Laboratory of Preventive Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
| | - Jichao Yang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
- Key Laboratory of Preventive Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
| | - Ruilian Jia
- Center for Emerging and Zoonotic Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, People’s Republic of China
| | - Yaoyu Feng
- Center for Emerging and Zoonotic Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, People’s Republic of China
| | - Bang Shen
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
- Key Laboratory of Preventive Medicine in Hubei Province, Huazhong Agricultural University, Wuhan, Hubei Province, People’s Republic of China
- Hubei Hongshan Laboratory, Wuhan, Hubei Province, People’s Republic of China
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16
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Zechner C, Henne WM, Sathe AA, Xing C, Hernandez G, Sun S, Cheong MC. Cellular abundance of sodium phosphate cotransporter SLC20A1/PiT1 and phosphate uptake are controlled post-transcriptionally by ESCRT. J Biol Chem 2022; 298:101945. [PMID: 35447110 PMCID: PMC9123275 DOI: 10.1016/j.jbc.2022.101945] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 04/09/2022] [Accepted: 04/12/2022] [Indexed: 11/30/2022] Open
Abstract
Inorganic phosphate is essential for human life. The widely expressed mammalian sodium/phosphate cotransporter SLC20A1/PiT1 mediates phosphate uptake into most cell types; however, while SLC20A1 is required for development, and elevated SLC20A1 expression is associated with vascular calcification and aggressive tumor growth, the mechanisms regulating SLC20A1 protein abundance are unknown. Here, we found that SLC20A1 protein expression is low in phosphate-replete cultured cells but is strikingly induced following phosphate starvation, whereas mRNA expression is high in phosphate-replete cells and only mildly increased by phosphate starvation. To identify regulators of SLC20A1 protein levels, we performed a genome-wide CRISPR-based loss-of-function genetic screen in phosphate-replete cells using SLC20A1 protein induction as readout. Our screen revealed that endosomal sorting complexes required for transport (ESCRT) machinery was essential for proper SLC20A1 protein downregulation in phosphate-replete cells. We show that SLC20A1 colocalizes with ESCRT and that ESCRT deficiency increases SLC20A1 protein and phosphate uptake into cells. We also found numerous additional candidate regulators of mammalian phosphate homeostasis, including genes modifying protein ubiquitination and the Krebs cycle and oxidative phosphorylation pathways. Many of these targets have not been previously implicated in this process. We present here a model in which SLC20A1 protein abundance and phosphate uptake are tonically negatively regulated post-transcriptionally in phosphate-replete cells through direct ESCRT-mediated SLC20A1 degradation. Moreover, our screening results provide a comprehensive resource for future studies to elucidate the mechanisms governing cellular phosphate homeostasis. We conclude that genome-wide CRISPR-based genetic screening is a powerful tool to discover proteins and pathways relevant to physiological processes.
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Affiliation(s)
- Christoph Zechner
- Division of Endocrinology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
| | - W Mike Henne
- Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Adwait A Sathe
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Chao Xing
- Eugene McDermott Center for Human Growth and Development, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Population and Data Sciences, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Genaro Hernandez
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Shengyi Sun
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA; Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Mi Cheong Cheong
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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17
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Daryadel A, Haykir B, Küng CJ, Bugarski M, Bettoni C, Schnitzbauer U, Hernando N, Hall AM, Wagner CA. Acute adaptation of renal phosphate transporters in the murine kidney to oral phosphate intake requires multiple signals. Acta Physiol (Oxf) 2022; 235:e13815. [PMID: 35334154 DOI: 10.1111/apha.13815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 12/01/2022]
Abstract
AIMS Dietary inorganic phosphate (Pi) modulates renal Pi reabsorption by regulating the expression of the NaPi-IIa and NaPi-IIc Pi transporters. Here, we aimed to clarify the role of several Pi-regulatory mechanisms including parathyroid hormone (PTH), fibroblast growth factor 23 (FGF23) and inositol hexakisphosphate kinases (IP6-kinases) in the acute regulation of NaPi-IIa and NaPi-IIc. METHODS Wildtype (WT) and PTH-deficient mice (PTH-KO) with/without inhibition of FGF23 signalling were gavaged with Pi/saline and examined at 1, 4 and 12 h. RESULTS Pi-gavage elevated plasma Pi and decreased plasma Ca2+ in both genotypes after 1 h Within 1 h, Pi-gavage decreased NaPi-IIa abundance in WT and PTH-KO mice. NaPi-IIc was downregulated 1 h post-administration in WT and after 4 h in PTH-KO. PTH increased after 1 h in WT animals. After 4 h Pi-gavage, FGF23 increased in both genotypes being higher in the KO group. PTHrp and dopamine were not altered by Pi-gavage. Blocking FGF23 signalling blunted PTH upregulation in WT mice and reduced NaPi-IIa downregulation in PTH-KO mice 4 h after Pi-gavage. Inhibition of IP6-kinases had no effect. CONCLUSIONS (1) Acute downregulation of renal Pi transporters in response to Pi intake occurs also in the absence of PTH and FGF23 signalling, (2) when FGF23 signalling is blocked, a partial contribution of PTH is revealed, (3) IP6 kinases, intracellular Pi-sensors in yeast and bacteria, are not involved, and (4) Acute Pi does not alter PTHrp and dopamine. Thus, signals other than PTH, PTHrp, FGF23 and dopamine contribute to renal adaption.
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Affiliation(s)
- Arezoo Daryadel
- Institute of Physiology University of Zürich Zürich Switzerland
- National Center of Competence in Research Kidney.CH Zürich Switzerland
| | - Betül Haykir
- Institute of Physiology University of Zürich Zürich Switzerland
| | | | - Milica Bugarski
- National Center of Competence in Research Kidney.CH Zürich Switzerland
- Institute of Anatomy University of Zürich Zürich Switzerland
| | - Carla Bettoni
- Institute of Physiology University of Zürich Zürich Switzerland
| | | | - Nati Hernando
- Institute of Physiology University of Zürich Zürich Switzerland
| | - Andrew M. Hall
- National Center of Competence in Research Kidney.CH Zürich Switzerland
- Institute of Anatomy University of Zürich Zürich Switzerland
| | - Carsten A. Wagner
- Institute of Physiology University of Zürich Zürich Switzerland
- National Center of Competence in Research Kidney.CH Zürich Switzerland
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18
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Akasu-Nagayoshi Y, Hayashi T, Kawabata A, Shimizu N, Yamada A, Yokota N, Nakato R, Shirahige K, Okamoto A, Akiyama T. The phosphate exporter XPR1/SLC53A1 is required for the tumorigenicity of epithelial ovarian cancer. Cancer Sci 2022; 113:2034-2043. [PMID: 35377528 PMCID: PMC9207365 DOI: 10.1111/cas.15358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 12/02/2022] Open
Abstract
Ovarian cancer is the fifth most common cause of cancer‐related death in women. Ovarian clear cell carcinoma (OCCC) is a chemotherapy‐resistant epithelial ovarian cancer with poor prognosis. As a basis for the development of therapeutic agents that could improve the prognosis of OCCC, we performed a screen for proteins critical for the tumorigenicity of OCCC using the CRISPR/Cas9 system. Here we show that knockdown of the phosphate exporter XPR1/SLC53A1 induces the growth arrest and apoptosis of OCCC cells in vitro. Moreover, we show that knockdown of XPR1/SLC53A1 inhibits the proliferation of OCCC cells xenografted into immunocompromised mice. These results suggest that XPR1/SLC53A1 plays a critical role in the tumorigenesis of OCCC cells. We speculate that XPR1/SLC53A1 might be a promising molecular target for the therapeutic treatment of OCCC.
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Affiliation(s)
- Yoko Akasu-Nagayoshi
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan.,Department of Obstetrics and Gynecology, Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo, Japan
| | - Tomoatsu Hayashi
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Ayako Kawabata
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan.,Department of Obstetrics and Gynecology, Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo, Japan
| | - Naomi Shimizu
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Ai Yamada
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Naoko Yokota
- Laboratory of Computational Genetics, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Ryuichiro Nakato
- Laboratory of Computational Genetics, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Katsuhiko Shirahige
- Laboratory of Genome Structure and Function, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Aikou Okamoto
- Department of Obstetrics and Gynecology, Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo, Japan
| | - Tetsu Akiyama
- Laboratory of Molecular and Genetic Information, Institute of Quantitative Biosciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
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19
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Xie X, Lai W, Che X, Wang S, Ren Y, Hu W, Chen H, Tang M. A SPX domain-containing phosphate transporter from Rhizophagus irregularis handles phosphate homeostasis at symbiotic interface of arbuscular mycorrhizas. New Phytol 2022; 234:650-671. [PMID: 35037255 DOI: 10.1111/nph.17973] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 12/22/2021] [Indexed: 05/28/2023]
Abstract
Reciprocal symbiosis of > 70% of terrestrial vascular plants with arbuscular mycorrhizal (AM) fungi provides the fungi with fatty acids and sugars. In return, AM fungi facilitate plant phosphate (Pi) uptake from soil. However, how AM fungi handle Pi transport and homeostasis at the symbiotic interface of AM symbiosis is poorly understood. Here, we identify an SPX (SYG1/Pho81/XPR1) domain-containing phosphate transporter, RiPT7 from Rhizophagus irregularis. To characterize the RiPT7 transporter, we combined subcellular localization and heterologous expression studies in yeasts with reverse genetics approaches during the in planta phase. The results show that RiPT7 is conserved across fungal species and expressed in the intraradical mycelia. It is expressed in the arbuscules, intraradical hyphae and vesicles, independently of Pi availability. The plasma membrane-localized RiPT7 facilitates bidirectional Pi transport, depending on Pi gradient across the plasma membrane, whereas the SPX domain of RiPT7 inhibits Pi transport activity and mediates the vacuolar targeting of RiPT7 in yeast in response to Pi starvation. Importantly, RiPT7 silencing hampers arbuscule development of R. irregularis and symbiotic Pi delivery under medium- to low-Pi conditions. Collectively, our findings reveal a role for RiPT7 in fine-tuning of Pi homeostasis across the fungal membrane to maintain the AM development.
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Affiliation(s)
- Xianan Xie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Wenzhen Lai
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Xianrong Che
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Sijia Wang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Ying Ren
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Wentao Hu
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Hui Chen
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Ming Tang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
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20
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Pan Y, Song Y, Zhao L, Chen P, Bu C, Liu P, Zhang D. The Genetic Basis of Phosphorus Utilization Efficiency in Plants Provide New Insight into Woody Perennial Plants Improvement. Int J Mol Sci 2022; 23:2353. [PMID: 35216469 DOI: 10.3390/ijms23042353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Revised: 02/18/2022] [Accepted: 02/19/2022] [Indexed: 01/01/2023] Open
Abstract
Soil nutrient restrictions are the main environmental conditions limiting plant growth, development, yield, and quality. Phosphorus (P), an essential macronutrient, is one of the most significant factors that vastly restrains the growth and development of plants. Although the total P is rich in soil, its bio-available concentration is still unable to meet the requirements of plants. To maintain P homeostasis, plants have developed lots of intricate responsive and acclimatory mechanisms at different levels, which contribute to administering the acquisition of inorganic phosphate (Pi), translocation, remobilization, and recycling of Pi. In recent years, significant advances have been made in the exploration of the utilization of P in annual plants, while the research progress in woody perennial plants is still vague. In the meanwhile, compared to annual plants, relevant reviews about P utilization in woody perennial plants are scarce. Therefore, based on the importance of P in the growth and development of plants, we briefly reviewed the latest advances on the genetic and molecular mechanisms of plants to uphold P homeostasis, P sensing, and signaling, ion transporting and metabolic regulation, and proposed the possible sustainable management strategies to fasten the P cycle in modern agriculture and new directions for future studies.
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21
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Wang P, Li G, Li G, Yuan S, Wang C, Xie Y, Guo T, Kang G, Wang D. TaPHT1;9-4B and its transcriptional regulator TaMYB4-7D contribute to phosphate uptake and plant growth in bread wheat. New Phytol 2021; 231:1968-1983. [PMID: 34096624 PMCID: PMC8489284 DOI: 10.1111/nph.17534] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/25/2021] [Indexed: 05/19/2023]
Abstract
Efficient phosphate (Pi) uptake and utilisation are essential for promoting crop yield. However, the underlying molecular mechanism is still poorly understood in complex crop species such as hexaploid wheat. Here we report that TaPHT1;9-4B and its transcriptional regulator TaMYB4-7D function in Pi acquisition, translocation and plant growth in bread wheat. TaPHT1;9-4B, a high-affinity Pi transporter highly upregulated in roots by Pi deficiency, was identified using quantitative proteomics. Disruption of TaPHT1;9-4B function by BSMV-VIGS or CRISPR editing impaired wheat tolerance to Pi deprivation, whereas transgenic expression of TaPHT1;9-4B in rice improved Pi uptake and plant growth. Using yeast-one-hybrid assay, we isolated TaMYB4-7D, a R2R3 MYB transcription factor that could activate TaPHT1;9-4B expression by binding to its promoter. Silencing TaMYB4-7D decreased TaPHT1;9-4B expression, Pi uptake and plant growth. Four promoter haplotypes were identified for TaPHT1;9-4B, with Hap3 showing significant positive associations with TaPHT1;9-4B transcript level, growth performance and phosphorus (P) content in wheat plants. A functional marker was therefore developed for tagging Hap3. Collectively, our data shed new light on the molecular mechanism controlling Pi acquisition and utilisation in bread wheat. TaPHT1;9-4B and TaMYB4-7D may aid further research towards the development of P efficient crop cultivars.
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Affiliation(s)
- Pengfei Wang
- The National Engineering Research Center for Wheat, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, 450046, China
| | - Gezi Li
- The State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China
| | - Guangwei Li
- The State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China
| | - Shasha Yuan
- The National Engineering Research Center for Wheat, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, 450046, China
| | - Chenyang Wang
- The State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yingxin Xie
- The National Engineering Research Center for Wheat, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, 450046, China
| | - Tiancai Guo
- The National Engineering Research Center for Wheat, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, 450046, China
| | - Guozhang Kang
- The National Engineering Research Center for Wheat, College of Agronomy, Henan Agricultural University, Longzi Lake Campus, Zhengzhou, 450046, China
- The State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China
| | - Daowen Wang
- The State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou, 450002, China
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22
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Liu Y, Li C, Gupta M, Verma N, Johri AK, Stroud RM, Voth GA. Key computational findings reveal proton transfer as driving the functional cycle in the phosphate transporter PiPT. Proc Natl Acad Sci U S A 2021; 118:e2101932118. [PMID: 34135124 DOI: 10.1073/pnas.2101932118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Phosphate is an indispensable metabolite in a wide variety of cells and is involved in nucleotide and lipid synthesis, signaling, and chemical energy storage. Proton-coupled phosphate transporters within the major facilitator family are crucial for phosphate uptake in plants and fungi. Similar proton-coupled phosphate transporters have been found in different protozoan parasites that cause human diseases, in breast cancer cells with elevated phosphate demand, in osteoclast-like cells during bone reabsorption, and in human intestinal Caco2BBE cells for phosphate homeostasis. However, the mechanism of proton-driven phosphate transport remains unclear. Here, we demonstrate in a eukaryotic, high-affinity phosphate transporter from Piriformospora indica (PiPT) that deprotonation of aspartate 324 (D324) triggers phosphate release. Quantum mechanics/molecular mechanics molecular dynamics simulations combined with free energy sampling have been employed here to identify the proton transport pathways from D324 upon the transition from the occluded structure to the inward open structure and phosphate release. The computational insights so gained are then corroborated by studies of D45N and D45E amino acid substitutions via mutagenesis experiments. Our findings confirm the function of the structurally predicted cytosolic proton exit tunnel and suggest insights into the role of the titratable phosphate substrate.
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23
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Figueres L, Beck-Cormier S, Beck L, Marks J. The Complexities of Organ Crosstalk in Phosphate Homeostasis: Time to Put Phosphate Sensing Back in the Limelight. Int J Mol Sci 2021; 22:5701. [PMID: 34071837 PMCID: PMC8199323 DOI: 10.3390/ijms22115701] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/13/2021] [Accepted: 05/21/2021] [Indexed: 12/16/2022] Open
Abstract
Phosphate homeostasis is essential for health and is achieved via interaction between the bone, kidney, small intestine, and parathyroid glands and via intricate processes involving phosphate transporters, phosphate sensors, and circulating hormones. Numerous genetic and acquired disorders are associated with disruption in these processes and can lead to significant morbidity and mortality. The role of the kidney in phosphate homeostasis is well known, although it is recognized that the cellular mechanisms in murine models and humans are different. Intestinal phosphate transport also appears to differ in humans and rodents, with recent studies demonstrating a dominant role for the paracellular pathway. The existence of phosphate sensing has been acknowledged for decades; however, the underlying molecular mechanisms are poorly understood. At least three phosphate sensors have emerged. PiT2 and FGFR1c both act as phosphate sensors controlling Fibroblast Growth Factor 23 secretion in bone, whereas the calcium-sensing receptor controls parathyroid hormone secretion in response to extracellular phosphate. All three of the proposed sensors are expressed in the kidney and intestine but their exact function in these organs is unknown. Understanding organ interactions and the mechanisms involved in phosphate sensing requires significant research to develop novel approaches for the treatment of phosphate homeostasis disorders.
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Affiliation(s)
- Lucile Figueres
- Department of Neuroscience, Physiology and Pharmacology, Royal Free Campus, University College London, London NW3 2PF, UK;
- CHU de Nantes, Université de Nantes, F-44042 Nantes, France
| | - Sarah Beck-Cormier
- Inserm, UMR 1229, RMeS Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, F-44042 Nantes, France; (S.B.-C.); (L.B.)
| | - Laurent Beck
- Inserm, UMR 1229, RMeS Regenerative Medicine and Skeleton, Université de Nantes, ONIRIS, F-44042 Nantes, France; (S.B.-C.); (L.B.)
| | - Joanne Marks
- Department of Neuroscience, Physiology and Pharmacology, Royal Free Campus, University College London, London NW3 2PF, UK;
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24
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Lv S, Wang D, Jiang P, Jia W, Li Y. Variation of PHT families adapts salt cress to phosphate limitation under salinity. Plant Cell Environ 2021; 44:1549-1564. [PMID: 33560528 DOI: 10.1111/pce.14027] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/25/2021] [Accepted: 02/05/2021] [Indexed: 05/25/2023]
Abstract
Salt cress (Eutrema salsugineum) presents relatively high phosphate (Pi) use efficiency cy in its natural habitat. Phosphate Transporters (PHTs) play critical roles in Pi acquisition and homeostasis. Here, a comparative study of PHT families between salt cress and Arabidopsis was performed. A total of 27 putative PHT genes were identified in E. salsugineum genome. Notably, seven tandem genes encoding PHT1;3 were found, and function analysis in Arabidopsis indicated at least six EsPHT1;3s participated in Pi uptake. Meanwhile, different expression profiles of PHT genes between the two species under Pi limitation and salt stress were documented. Most PHT1 genes were down-regulated in Arabidopsis while up-regulated in salt cress under salinity, among which EsPHT1;9 was further characterized. EsPHT1;9 was involved in root-to-shoot Pi translocation. Particularly, the promoter of EsPHT1;9 outperformed that of AtPHT1;9 in promoting Pi translocation, K+ /Na+ ratio, thereby salt tolerance. Through cis-element analysis, we identified a bZIP transcription factor EsABF5 negatively regulating EsPHT1;9 and plant tolerance to low-Pi and salt stress. Altogether, more copies and divergent transcriptional regulation of PHT genes contribute to salt cress adaptation to the co-occurrence of salinity and Pi limitation, which add our knowledge on the evolutionary and molecular component of multistress- tolerance of this species.
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Affiliation(s)
- Sulian Lv
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
| | - Duoliya Wang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ping Jiang
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Weitao Jia
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- Key Laboratory on Water Environment of Reservoir Watershed, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China
| | - Yinxin Li
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
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25
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Zhang J, Gu M, Liang R, Shi X, Chen L, Hu X, Wang S, Dai X, Qu H, Li H, Xu G. OsWRKY21 and OsWRKY108 function redundantly to promote phosphate accumulation through maintaining the constitutive expression of OsPHT1;1 under phosphate-replete conditions. New Phytol 2021; 229:1598-1614. [PMID: 32936937 PMCID: PMC7820984 DOI: 10.1111/nph.16931] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 09/03/2020] [Indexed: 05/20/2023]
Abstract
Plant Phosphate Transporter 1 (PHT1) proteins, probably the only influx transporters for phosphate (Pi) uptake, are partially degraded on sufficient Pi levels to prevent excessive Pi accumulation. Therefore, the basal/constitutive expression level of PHT1 genes is vital for maintaining Pi uptake under Pi-replete conditions. Rice (Oryza sativa) OsPHT1;1 is a unique gene as it is highly expressed and not responsive to Pi, however the mechanism for maintaining its basal/constitutive expression remains unknown. Using biochemical and genetic approaches, we identified and functionally characterised the transcription factors maintaining the basal/constitutive expression of OsPHT1;1. OsWRKY21 and OsWRKY108 interact within the nucleus and both bind to the W-box in the OsPHT1;1 promoter. Overexpression of OsWRKY21 or OsWRKY108 led to increased Pi accumulation, resulting from elevated expression of OsPHT1;1. By contrast, oswrky21 oswrky108 double mutants showed decreased Pi accumulation and OsPHT1;1 expression in a Pi-dependent manner. Moreover, similar to ospht1;1 mutants, plants expressing the OsWRKY21-SRDX fusion protein (a chimeric dominant suppressor) were impaired in Pi accumulation in Pi-replete roots, accompanied by downregulation of OsPHT1;1 expression. Our findings demonstrated that rice WRKY transcription factors function redundantly to promote Pi uptake by activating OsPHT1;1 expression under Pi-replete conditions, and represent a novel pathway independent of the central Pi signalling system.
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Affiliation(s)
- Jun Zhang
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Mian Gu
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
- MOA Key Laboratory of Plant Nutrition and Fertilisation in Lower‐Middle Reaches of the Yangtze RiverNanjing210095China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilisationNanjing210095China
| | - Ruisuhua Liang
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Xinyu Shi
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Lingling Chen
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Xu Hu
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Shichao Wang
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Xiaoli Dai
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
- MOA Key Laboratory of Plant Nutrition and Fertilisation in Lower‐Middle Reaches of the Yangtze RiverNanjing210095China
| | - Hongye Qu
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
- MOA Key Laboratory of Plant Nutrition and Fertilisation in Lower‐Middle Reaches of the Yangtze RiverNanjing210095China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilisationNanjing210095China
| | - Huanhuan Li
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
| | - Guohua Xu
- State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing210095China
- MOA Key Laboratory of Plant Nutrition and Fertilisation in Lower‐Middle Reaches of the Yangtze RiverNanjing210095China
- Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilisationNanjing210095China
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Cai S, Liu F, Zhou B. Genome-Wide Identification and Expression Profile Analysis of the PHT1 Gene Family in Gossypium hirsutum and Its Two Close Relatives of Subgenome Donor Species. Int J Mol Sci 2020; 21:E4905. [PMID: 32664546 PMCID: PMC7404403 DOI: 10.3390/ijms21144905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/02/2020] [Accepted: 07/09/2020] [Indexed: 11/16/2022] Open
Abstract
Phosphate transporter (PHT) is responsible for plant phosphorus (P) absorption and transport. PHT1 is a component of the high-affinity phosphate transporter system and plays pivotal roles in P absorption under P starvation conditions. However, in cotton, the number and identity of PHT1 genes that are crucial for P absorption from soil remain unclear. Here, genome-wide identification detected twelve PHT1 genes in Gossypium hirsutum and seven and eight PHT1 genes in two close relatives of the G. hirsutum genome-G. arboreum and G. raimondii, respectively. In addition, under low-phosphate treatment, the expressions of GaPHT1;3, GaPHT1;4, and GaPHT1;5 in roots were upregulated after 3 h of induction, and GhPHT1;3-At, GhPHT1;4-At, GhPHT1;5-At, GhPHT1;3-Dt, GhPHT1;4-Dt, and GhPHT1;5-Dt in the roots began to respond after 1 h of induction. Homologous pairs-GaPHT1;4 and GhPHT1;4-At; GaPHT1;5 and GhPHT1;5-At; GrPHT1;4 and GhPHT1;4-Dt, with GhPHT1;5-Dt and GhPHT1;5-At being syntenic-were all highly expressed in the roots under normal conditions. Among the genes highly expressed in the roots, GhPHT1;4-At, GhPHT1;5-At, GhPHT1;4-Dt and GhPHT1;5-Dt were continuously upregulated by P starvation. Therefore, it is concluded that these four genes might be key genes for P uptake in cotton roots. The results of this study provide insights into the mechanisms of P absorption and transport in cotton.
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Affiliation(s)
| | | | - Baoliang Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement, MOE Hybrid Cotton R&D Engineering Research Center, Nanjing Agricultural University, Nanjing 210095, China; (S.C.); (F.L.)
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27
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López-Sánchez U, Tury S, Nicolas G, Wilson MS, Jurici S, Ayrignac X, Courgnaud V, Saiardi A, Sitbon M, Battini JL. Interplay between primary familial brain calcification-associated SLC20A2 and XPR1 phosphate transporters requires inositol polyphosphates for control of cellular phosphate homeostasis. J Biol Chem 2020; 295:9366-9378. [PMID: 32393577 PMCID: PMC7363132 DOI: 10.1074/jbc.ra119.011376] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 05/09/2020] [Indexed: 12/19/2022] Open
Abstract
Solute carrier family 20 member 2 (SLC20A2) and xenotropic and polytropic retrovirus receptor 1 (XPR1) are transporters with phosphate uptake and efflux functions, respectively. Both are associated with primary familial brain calcification (PFBC), a genetic disease characterized by cerebral calcium-phosphate deposition and associated with neuropsychiatric symptoms. The association of the two transporters with the same disease suggests that they jointly regulate phosphate fluxes and cellular homeostasis, but direct evidence is missing. Here, we found that cross-talk between SLC20A2 and XPR1 regulates phosphate homeostasis, and we identified XPR1 as a key inositol polyphosphate (IP)-dependent regulator of this process. We found that overexpression of WT SLC20A2 increased phosphate uptake, as expected, but also unexpectedly increased phosphate efflux, whereas PFBC-associated SLC20A2 variants did not. Conversely, SLC20A2 depletion decreased phosphate uptake only slightly, most likely compensated for by the related SLC20A1 transporter, but strongly decreased XPR1-mediated phosphate efflux. The SLC20A2-XPR1 axis maintained constant intracellular phosphate and ATP levels, which both increased in XPR1 KO cells. Elevated ATP levels are a hallmark of altered inositol pyrophosphate (PP-IP) synthesis, and basal ATP levels were restored after phosphate efflux rescue with WT XPR1 but not with XPR1 harboring a mutated PP-IP-binding pocket. Accordingly, inositol hexakisphosphate kinase 1-2 (IP6K1-2) gene inactivation or IP6K inhibitor treatment abolished XPR1-mediated phosphate efflux regulation and homeostasis. Our findings unveil an SLC20A2-XPR1 interplay that depends on IPs such as PP-IPs and controls cellular phosphate homeostasis via the efflux route, and alteration of this interplay likely contributes to PFBC.
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Affiliation(s)
- Uriel López-Sánchez
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS, Montpellier, France.,Institut de Génétique Moléculaire de Montpellier (IGMM), Université de Montpellier, CNRS, Montpellier, France
| | - Sandrine Tury
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS, Montpellier, France
| | - Gaël Nicolas
- Normandie Univ, UNIROUEN, Inserm U1245, and Rouen University Hospital, Department of Genetics and CNR-MAJ, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Miranda S Wilson
- MRC Laboratory for Molecular Cell Biology, University College London, London, United Kingdom
| | - Snejana Jurici
- Department of Neurology, Perpignan Hospital, Perpignan, France
| | - Xavier Ayrignac
- Department of Neurology, Montpellier University Hospital, Montpellier, France
| | - Valérie Courgnaud
- Institut de Génétique Moléculaire de Montpellier (IGMM), Université de Montpellier, CNRS, Montpellier, France
| | - Adolfo Saiardi
- MRC Laboratory for Molecular Cell Biology, University College London, London, United Kingdom
| | - Marc Sitbon
- Institut de Génétique Moléculaire de Montpellier (IGMM), Université de Montpellier, CNRS, Montpellier, France
| | - Jean-Luc Battini
- Institut de Recherche en Infectiologie de Montpellier (IRIM), Université de Montpellier, CNRS, Montpellier, France .,Institut de Génétique Moléculaire de Montpellier (IGMM), Université de Montpellier, CNRS, Montpellier, France
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Tsuboi Y, Ohtomo S, Ichida Y, Hagita H, Ozawa K, Iida M, Nagao S, Ikegami H, Takahashi T, Horiba N. EOS789, a novel pan- phosphate transporter inhibitor, is effective for the treatment of chronic kidney disease-mineral bone disorder. Kidney Int 2020; 98:343-354. [PMID: 32624180 DOI: 10.1016/j.kint.2020.02.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 02/18/2020] [Accepted: 02/28/2020] [Indexed: 12/13/2022]
Abstract
Chronic kidney disease is characterized as impaired renal function along with the imbalance and dysregulation of mineral metabolism; recognized as chronic kidney disease-mineral and bone disorder. Hyperphosphatemia, characterized by altered phosphate homeostasis along with elevated fibroblast growth factor-23 and intact parathyroid hormone, is such an alteration of mineral metabolism. We discovered a novel inhibitor, EOS789, that interacts with several sodium-dependent phosphate transporters (NaPi-IIb, PiT-1, and PiT-2) known to contribute to intestinal phosphate absorption. This inhibitor dose-dependently increased the fecal phosphorus excretion rate and inversely decreased the urinary phosphorus excretion rate in normal rats, suggesting inhibition of intestinal phosphorus absorption. In rats with adenine-induced hyperphosphatemia, EOS789 markedly decreased the serum phosphate, fibroblast growth factor-23, and intact parathyroid hormone below values found in normal control rats. Notably, this pan-phosphate transporter inhibitor exhibited a more potent effect on serum phosphate than a NaPi-IIb-selective inhibitor in rats with hyperphosphatemia indicating that PiT-1 and PiT-2 play important roles in intestinal phosphate absorption. Moreover, in a long-term study, EOS789 sustained the suppression of serum phosphorus in parallel with fibroblast growth factor-23 and intact parathyroid hormone and ameliorated ectopic calcification of the thoracic aorta. Additionally, EOS789 treatment also ameliorated kidney deterioration in rats with progressive kidney injury, probably due to the strict phosphate control. Thus, EOS789 has potent efficacy against hyperphosphatemia and its complications and could provide a significant benefit to patients who are ineffectively treated with phosphate binders.
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Affiliation(s)
- Yoshinori Tsuboi
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
| | - Shuichi Ohtomo
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan.
| | - Yasuhiro Ichida
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
| | - Hitoshi Hagita
- Chugai Research Institute for Medical Science, Inc., Gotemba, Shizuoka, Japan
| | - Kazuharu Ozawa
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
| | - Manami Iida
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
| | - Shunsuke Nagao
- Translational Research Division, Chugai Pharmaceutical Co., Ltd., Kamakura, Kanagawa, Japan
| | - Hisashi Ikegami
- Translational Research Division, Chugai Pharmaceutical Co., Ltd., Kamakura, Kanagawa, Japan
| | - Tadakatsu Takahashi
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
| | - Naoshi Horiba
- Research Division, Chugai Pharmaceutical Co., Ltd., Gotemba, Shizuoka, Japan
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29
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Endo Y, Funayama H, Yamaguchi K, Monma Y, Yu Z, Deng X, Oizumi T, Shikama Y, Tanaka Y, Okada S, Kim S, Kiyama T, Bando K, Shima K, Suzuki H, Takahashi T. [Basic Studies on the Mechanism, Prevention, and Treatment of Osteonecrosis of the Jaw Induced by Bisphosphonates]. YAKUGAKU ZASSHI 2020; 140:63-79. [PMID: 31902887 DOI: 10.1248/yakushi.19-00125] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Since the first report in 2003, bisphosphonate-related osteonecrosis of the jaw (BRONJ) has been increasing, without effective clinical strategies. Osteoporosis is common in elderly women, and bisphosphonates (BPs) are typical and widely used anti-osteoporotic or anti-bone-resorptive drugs. BRONJ is now a serious concern in dentistry. As BPs are pyrophosphate analogues and bind strongly to bone hydroxyapatite, and the P-C-P structure of BPs is non-hydrolysable, they accumulate in bones upon repeated administration. During bone-resorption, BPs are taken into osteoclasts and exhibit cytotoxicity, producing a long-lasting anti-bone-resorptive effect. BPs are divided into nitrogen-containing BPs (N-BPs) and non-nitrogen-containing BPs (non-N-BPs). N-BPs have far stronger anti-bone-resorptive effects than non-N-BPs, and BRONJ is caused by N-BPs. Our murine experiments have revealed the following. N-BPs, but not non-N-BPs, exhibit direct and potent inflammatory/necrotic effects on soft-tissues. These effects are augmented by lipopolysaccharide (the inflammatory component of bacterial cell-walls) and the accumulation of N-BPs in jawbones is augmented by inflammation. N-BPs are taken into soft-tissue cells via phosphate-transporters, while the non-N-BPs etidronate and clodronate inhibit this transportation. Etidronate, but not clodronate, has the effect of expelling N-BPs that have accumulated in bones. Moreover, etidronate and clodronate each have an analgesic effect, while clodronate has an anti-inflammatory effect via inhibition of phosphate-transporters. These findings suggest that BRONJ may be induced by phosphate-transporter-mediated and infection-promoted mechanisms, and that etidronate and clodronate may be useful for preventing and treating BRONJ. Our clinical trials support etidronate being useful for treating BRONJ, although additional clinical trials of etidronate and clodronate are needed.
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Affiliation(s)
- Yasuo Endo
- Divisions of Pharmacology, Graduate School of Dentistry, Tohoku University.,Divisions of Molecular Regulation, Graduate School of Dentistry, Tohoku University.,Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Hiromi Funayama
- Divisions of Pediatric Dentistry, Graduate School of Dentistry, Tohoku University.,Department of Pediatric Dentistry, Tsurumi University School of Dental Medicine
| | - Kouji Yamaguchi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Yuko Monma
- Divisions of Pediatric Dentistry, Graduate School of Dentistry, Tohoku University
| | - Zhiqian Yu
- Divisions of Oral Diagnosis, Graduate School of Dentistry, Tohoku University
| | - Xue Deng
- Divisions of Oral Diagnosis, Graduate School of Dentistry, Tohoku University
| | - Takefumi Oizumi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Yosuke Shikama
- Divisions of Periodontology and Endodontology, Graduate School of Dentistry, Tohoku University
| | - Yukinori Tanaka
- Divisions of Molecular Regulation, Graduate School of Dentistry, Tohoku University
| | - Satoshi Okada
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Siyoung Kim
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Tomomi Kiyama
- Divisions of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
| | - Kanan Bando
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Kazuhiro Shima
- Divisions of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University
| | - Hikari Suzuki
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
| | - Tetsu Takahashi
- Divisions of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Tohoku University
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30
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Omara II, Mou CT, Persia ME, Wong EA. Effects of available phosphorus source and concentration on performance and expression of sodium phosphate type IIb cotransporter, vitamin D-1α-hydroxylase, and vitamin D-24-hydroxylase mRNA in broiler chicks. Poult Sci 2020; 99:1822-1831. [PMID: 32241462 PMCID: PMC7587676 DOI: 10.1016/j.psj.2019.12.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/26/2019] [Accepted: 12/10/2019] [Indexed: 11/17/2022] Open
Abstract
This experiment was conducted to examine the effect of 2 phosphorus (P) sources on broiler performance to day 14. The P bioavailability was estimated using bird performance and tibia ash measurements, whereas P digestibility, intestinal P transporter, kidney vitamin D-1α-hydroxylase, and vitamin D-24-hydroxylase mRNA abundances were also determined. Slope regression analysis was used to determine the bioavailability of dicalcium phosphate (Dical P) and nanocalcium phosphate (Nano P) with dietary available P (AvP) set to 0.20% P (control) using AvP from the major ingredients and Dical P. The experimental treatments were achieved by supplementation with either Dical P or Nano P to generate 0.24, 0.28, 0.32, and 0.36% AvP. A total of 648-day-old unsexed broiler chicks were divided into 72 birds per treatment (8 replicate cages of 9 birds). Slope regression analysis showed positive linear relationships between BW, feed intake (FI), tibia ash weight (TAW), and tibia ash percentage (TAP) with dietary Dical P and Nano P levels. Comparisons between regression slopes for Dical P and Nano P fed birds were not significantly different for BW, feed intake, tibia ash weight, and tibia ash percentage, indicating similar P bioavailability from Dical P and Nano P. There were interactions between P source and AvP for feed efficiency (FE) and apparent ileal P digestibility (AIPD). Dicalcium phosphate had greater FE than Nano P at 0.28% AvP and greater AIPD than Nano P at 0.24% AvP. The addition of AvP from Dical P and Nano P resulted in reduced sodium phosphate cotransporter mRNA abundance in the duodenum in a dose–dependent response. In the kidney, vitamin D-1α-hydroxylase mRNA abundance was greater at 0.36% Nano P compared with control, but there was no difference with Dical P. There was no difference in vitamin D-24-hydroxylase mRNA abundance between control and supplementation with Nano P or Dical P. In conclusion, Nano P and Dical P had the same bioavailability but had different effects on gene expression.
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Affiliation(s)
- I I Omara
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24060, USA; Animal Production Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
| | - C T Mou
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - M E Persia
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - E A Wong
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA 24060, USA.
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31
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Hanazaki A, Ikuta K, Sasaki S, Sasaki S, Koike M, Tanifuji K, Arima Y, Kaneko I, Shiozaki Y, Tatsumi S, Hasegawa T, Amizuka N, Miyamoto K, Segawa H. Role of sodium-dependent Pi transporter/Npt2c on Pi homeostasis in klotho knockout mice different properties between juvenile and adult stages. Physiol Rep 2020; 8:e14324. [PMID: 32026654 PMCID: PMC7002534 DOI: 10.14814/phy2.14324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
SLC34A3/NPT2c/NaPi-2c/Npt2c is a growth-related NaPi cotransporter that mediates the uptake of renal sodium-dependent phosphate (Pi). Mutation of human NPT2c causes hereditary hypophosphatemic rickets with hypercalciuria. Mice with Npt2c knockout, however, exhibit normal Pi metabolism. To investigate the role of Npt2c in Pi homeostasis, we generated α-klotho-/- /Npt2c-/- (KL2cDKO) mice and analyzed Pi homeostasis. α-Klotho-/- (KLKO) mice exhibit hyperphosphatemia and markedly increased kidney Npt2c protein levels. Genetic disruption of Npt2c extended the lifespan of KLKO mice similar to that of α-Klotho-/- /Npt2a-/- mice. Adult KL2cDKO mice had hyperphosphatemia, but analysis of Pi metabolism revealed significantly decreased intestinal and renal Pi (re)absorption compared with KLKO mice. The 1,25-dihydroxy vitamin D3 concentration was not reduced in KL2cDKO mice compared with that in KLKO mice. The KL2cDKO mice had less severe soft tissue and vascular calcification compared with KLKO mice. Juvenile KL2cDKO mice had significantly reduced plasma Pi levels, but Pi metabolism was not changed. In Npt2cKO mice, plasma Pi levels began to decrease around the age of 15 days and significant hypophosphatemia developed within 21 days. The findings of the present study suggest that Npt2c contributes to regulating plasma Pi levels in the juvenile stage and affects Pi retention in the soft and vascular tissues in KLKO mice.
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Affiliation(s)
- Ai Hanazaki
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Kayo Ikuta
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Shohei Sasaki
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Sumire Sasaki
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Megumi Koike
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Kazuya Tanifuji
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Yuki Arima
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Ichiro Kaneko
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Yuji Shiozaki
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Sawako Tatsumi
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Tomoka Hasegawa
- Developmental Biology of Hard TissueHokkaido University Graduate School of Dental MedicineSapporoJapan
| | - Norio Amizuka
- Developmental Biology of Hard TissueHokkaido University Graduate School of Dental MedicineSapporoJapan
| | - Ken‐ichi Miyamoto
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
| | - Hiroko Segawa
- Department of Applied NutritionInstitute of Biomedical SciencesTokushima University Graduate School TokushimaTokushimaJapan
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Ding G, Lei GJ, Yamaji N, Yokosho K, Mitani-Ueno N, Huang S, Ma JF. Vascular Cambium-Localized AtSPDT Mediates Xylem-to-Phloem Transfer of Phosphorus for Its Preferential Distribution in Arabidopsis. Mol Plant 2020; 13:99-111. [PMID: 31610248 DOI: 10.1016/j.molp.2019.10.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 09/18/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
During plant growth and development mineral elements are preferentially delivered to different organs and tissues to meet the differential demand. It has been shown that the preferential distribution of mineral nutrients in gramineous plants is mediated by node-based transporters, but the mechanisms of preferential distribution in dicots are poorly understood. Here, we report a distinct mechanism for the preferential distribution of phosphorus (P) in Arabidopsis plants, revealed by detailed functional analysis of AtSPDT/AtSULTR3;4 (SULTR-like P Distribution Transporter), a homolog of rice OsSPDT. Like OsSPDT, AtSPDT is localized at the plasma membrane and showed proton-dependent transport activity for P. Interestingly, we found that AtSPDT is mainly expressed in the rosette basal region and leaf petiole, and its expression is up-regulated by P deficiency. Tissue-specific analysis showed that AtSPDT is mainly located in the vascular cambium of different organs, as well as in the parenchyma tissues of both xylem and phloem regions. Knockout of AtSPDT inhibited the growth of new leaves under low P due to decreased P distribution to those organs. The seed yields of the wild-type and atspdt mutant plants are similar, but the seeds of mutant plants contain - less P. These results indicate that AtSPDT localized in the vascular cambium is involved in preferential distribution of P to the developing tissues, through xylem-to-phloem transfer mainly at the rosette basal region and leaf petiole.
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Affiliation(s)
- Guangda Ding
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Gui Jie Lei
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Naoki Yamaji
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Kengo Yokosho
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Namiki Mitani-Ueno
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Sheng Huang
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan.
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33
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Cominelli E, Pilu R, Sparvoli F. Phytic Acid and Transporters: What Can We Learn from low phytic acid Mutants. Plants (Basel) 2020; 9:plants9010069. [PMID: 31948109 PMCID: PMC7020491 DOI: 10.3390/plants9010069] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/23/2019] [Accepted: 01/01/2020] [Indexed: 01/22/2023]
Abstract
Phytic acid has two main roles in plant tissues: Storage of phosphorus and regulation of different cellular processes. From a nutritional point of view, it is considered an antinutritional compound because, being a cation chelator, its presence reduces mineral bioavailability from the diet. In recent decades, the development of low phytic acid (lpa) mutants has been an important goal for nutritional seed quality improvement, mainly in cereals and legumes. Different lpa mutations affect phytic acid biosynthetic genes. However, other lpa mutations isolated so far, affect genes coding for three classes of transporters: A specific group of ABCC type vacuolar transporters, putative sulfate transporters, and phosphate transporters. In the present review, we summarize advances in the characterization of these transporters in cereals and legumes. Particularly, we describe genes, proteins, and mutants for these different transporters, and we report data of in silico analysis aimed at identifying the putative orthologs in some other cereal and legume species. Finally, we comment on the advantage of using such types of mutants for crop biofortification and on their possible utility to unravel links between phosphorus and sulfur metabolism (phosphate and sulfate homeostasis crosstalk).
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Affiliation(s)
- Eleonora Cominelli
- Institute of Agricultural Biology and Biotechnology, Consiglio Nazionale delle Ricerche, Via E. Bassini 15, 20133 Milan, Italy;
- Correspondence: ; Tel.: +39-022-369-9421
| | - Roberto Pilu
- Department of Agricultural and Environmental Sciences—Production Landscape, Agroenergy Università degli Studi di Milano, Via G. Celoria 2, 20133 Milan, Italy;
| | - Francesca Sparvoli
- Institute of Agricultural Biology and Biotechnology, Consiglio Nazionale delle Ricerche, Via E. Bassini 15, 20133 Milan, Italy;
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Cao Y, Liu J, Li Y, Zhang J, Li S, An Y, Hu T, Yang P. Functional Analysis of the Phosphate Transporter Gene MtPT6 From Medicago truncatula. Front Plant Sci 2020; 11:620377. [PMID: 33613589 PMCID: PMC7890022 DOI: 10.3389/fpls.2020.620377] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 12/29/2020] [Indexed: 05/22/2023]
Abstract
Phosphorus is one of the essential macronutrients required by plant growth and development, but phosphate resources are finite and diminishing rapidly because of the huge need in global agriculture. In this study, 11 genes were found in the Phosphate Transporter 1 (PHT1) family of Medicago truncatula. Seven genes of the PHT1 family were available by qRT-PCR. Most of them were expressed in roots, and almost all genes were induced by low-phosphate stress in the nodule. The expression of MtPT6 was relatively high in nodules and induced by low-phosphate stress. The fusion expression of MtPT6 promoter-GUS gene in M. truncatula suggested that the expression of MtPT6 was induced in roots and nodules by phosphate starvation. In roots, MtPT6 was mainly expressed in vascular tissue and tips, and it was also expressed in cortex under low-phosphate stress; in nodules, it was mainly expressed in vascular bundles, cortical cells, and fixation zone cells. MtPT6 had a close relationship with other PHT1 family members according to amino acid alignment and phylogenetic analysis. Subcellular localization analysis in tobacco revealed that MtPT6 protein was localized to the plasma membrane. The heterologous expression of MtPT6 in Arabidopsis knockout mutants of pht1.1 and pht1.4 made seedlings more susceptible to arsenate treatment, and the phosphate concentrations in pht1.1 were higher in high phosphate condition by expressing MtPT6. We conclude that MtPT6 is a typical phosphate transporter gene and can promote phosphate acquisition efficiency of plants.
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35
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Cao S, Zhang S, Liu G, Zhang L, Lu L, Zhang R, Liao X, Luo X. Kinetics of phosphorus absorption and expressions of related transporters in primary cultured duodenal epithelial cells of chick embryos. J Anim Physiol Anim Nutr (Berl) 2019; 104:237-244. [PMID: 31808203 DOI: 10.1111/jpn.13260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 10/21/2019] [Accepted: 11/02/2019] [Indexed: 01/21/2023]
Abstract
Two experiments were conducted to investigate the kinetics of phosphorus (P) absorption and expressions of type IIb sodium-dependent phosphate cotransporter (NaP-IIb), inorganic phosphate transporters 1 and 2 (PiT-1 and PiT-2) in primary cultured duodenal epithelial cells of chick embryos. In experiment 1, the P absorptions across duodenal epithelial cell monolayers at different incubation time points (0, 10, 20, 40, 60, 80, 100 and 120 min) were compared. In experiment 2, the kinetics of P absorption was performed at 40 min after incubation of duodenal epithelial cells with the media containing 0, 0.75, 1.5, 3.0, 6.0, 12.0, 24.0 and 48.0 mmol P/L as KH2 PO4 , and the mRNA and protein expression levels of NaP-IIb, PiT-1 and PiT-2 in duodenal epithelial cells with the media containing 0, 6.0 and 48.0 mmol P/L were determined at 87 min after incubation. The results from experiment 1 showed that the P absorption increased linearly (p < .0001) from 0 to 80 min and the fastest increase occurred at 40 min; the asymptotic model was shown to have the best fit degree, and the optimal incubation time for saturable P absorption was determined to be 87 min. The kinetic curves of P absorption from experiment 2 demonstrated that P absorption was a mixed process of a non-saturable diffusion plus a saturable carrier-mediated transport across the duodenal epithelial cells. The high P concentration (48.0 mmol/L) decreased (p < .05) NaP-IIb and PiT-1 mRNA and protein levels and increased (p < .0001) PiT-2 mRNA level. These results indicated that the P absorption across primary cultured duodenal epithelial cell monolayers of chick embryos was a mixed process of a non-saturable diffusion plus a saturable carrier-mediated transport and could be restricted by reducing the NaP-IIb and PiT-1 expressions while increasing the PiT-2 expression at a high P concentration.
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Affiliation(s)
- Sumei Cao
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China.,Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Shumin Zhang
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Guoqing Liu
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Liyang Zhang
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Lin Lu
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Rijun Zhang
- Laboratory of Feed Biotechnology, State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, P. R. China
| | - Xiudong Liao
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Xugang Luo
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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Lederer E. Another Tool in the Fight Against Phosphate Toxicity: Where Will It Fit and What Does It Tell Us about Phosphate Homeostasis? J Am Soc Nephrol 2019; 30:2039-2040. [PMID: 31604810 DOI: 10.1681/asn.2019090924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Eleanor Lederer
- Division of Nephrology and Hypertension, Department of Medicine, University of Louisville School of Medicine, Robley Rex Veterans Affairs Medical Center, Louisville, Kentucky
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Luo Y, Wei Y, Sun S, Wang J, Wang W, Han D, Shao H, Jia H, Fu Y. Selenium Modulates the Level of Auxin to Alleviate the Toxicity of Cadmium in Tobacco. Int J Mol Sci 2019; 20:E3772. [PMID: 31374993 PMCID: PMC6696094 DOI: 10.3390/ijms20153772] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/28/2019] [Accepted: 07/30/2019] [Indexed: 12/20/2022] Open
Abstract
Cadmium (Cd) is an environmental pollutant that potentially threatens human health worldwide. Developing approaches for efficiently treating environmental Cd is a priority. Selenium (Se) plays important role in the protection of plants against various abiotic stresses, including heavy metals. Previous research has shown that Se can alleviate Cd toxicity, but the molecular mechanism is still not clear. In this study, we explore the function of auxin and phosphate (P) in tobacco (Nicotiana tabacum), with particular focus on their interaction with Se and Cd. Under Cd stress conditions, low Se (10 μM) significantly increased the biomass and antioxidant capacity of tobacco plants and reduced uptake of Cd. We also measured the auxin concentration and expression of auxin-relative genes in tobacco and found that plants treated with low Se (10 μM) had higher auxin concentrations at different Cd supply levels (0 μM, 20 μM, 50 μM) compared with no Se treatment, probably due to increased expression of auxin synthesis genes and auxin efflux carriers. Overexpression of a high affinity phosphate transporter NtPT2 enhanced the tolerance of tobacco to Cd stress, possibly by increasing the total P and Se content and decreasing Cd accumulation compared to that in the wild type (WT). Our results show that there is an interactive mechanism among P, Se, Cd, and auxin that affects plant growth and may provide a new approach for relieving Cd toxicity in plants.
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Affiliation(s)
- Yong Luo
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Yuewei Wei
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Shuguang Sun
- China Tobacco Hubei Industrial Co., Ltd., Wuhan 430040, China
| | - Jian Wang
- China Tobacco Hubei Industrial Co., Ltd., Wuhan 430040, China
| | - Weifeng Wang
- Guangxi Zhuang Autonomous Region Provincial Branch of China National Tobacco Corporation, Nanning 530000, China
| | - Dan Han
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Huifang Shao
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Hongfang Jia
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China.
| | - Yunpeng Fu
- National Tobacco Cultivation & Physiology & Biochemistry Research Centre, College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China.
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38
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Watts-Williams SJ, Emmett BD, Levesque-Tremblay V, MacLean AM, Sun X, Satterlee JW, Fei Z, Harrison MJ. Diverse Sorghum bicolor accessions show marked variation in growth and transcriptional responses to arbuscular mycorrhizal fungi. Plant Cell Environ 2019; 42:1758-1774. [PMID: 30578745 DOI: 10.1111/pce.13509] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 12/13/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
Sorghum is an important crop grown worldwide for feed and fibre. Like most plants, it has the capacity to benefit from symbioses with arbuscular mycorrhizal (AM) fungi, and its diverse genotypes likely vary in their responses. Currently, the genetic basis of mycorrhiza-responsiveness is largely unknown. Here, we investigated transcriptional and physiological responses of sorghum accessions, founders of a bioenergy nested association mapping panel, for their responses to four species of AM fungi. Transcriptome comparisons across four accessions identified mycorrhiza-inducible genes; stringent filtering criteria revealed 278 genes that show mycorrhiza-inducible expression independent of genotype and 55 genes whose expression varies with genotype. The latter suggests variation in phosphate transport and defence across these accessions. The mycorrhiza growth and nutrient responses of 18 sorghum accessions varied tremendously, ranging from mycorrhiza-dependent to negatively mycorrhiza-responsive. Additionally, accessions varied in the number of AM fungi to which they showed positive responses, from one to several fungal species. Mycorrhiza growth and phosphorus responses were positively correlated, whereas expression of two mycorrhiza-inducible phosphate transporters, SbPT8 and SbPT9, correlated negatively with mycorrhizal growth responses. AM fungi improve growth and mineral nutrition of sorghum, and the substantial variation between lines provides the potential to map loci influencing mycorrhiza responses.
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Affiliation(s)
| | - Bryan D Emmett
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
| | | | - Allyson M MacLean
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
| | - Xuepeng Sun
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
| | - James W Satterlee
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
- Plant Biology Section, SIPs, Cornell University, Ithaca, 14853, NY, USA
| | - Zhangjun Fei
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
| | - Maria J Harrison
- Boyce Thompson Institute, 533 Tower Rd, Ithaca, 14853, New York, USA
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Chen L, Qin L, Zhou L, Li X, Chen Z, Sun L, Wang W, Lin Z, Zhao J, Yamaji N, Ma JF, Gu M, Xu G, Liao H. A nodule-localized phosphate transporter GmPT7 plays an important role in enhancing symbiotic N 2 fixation and yield in soybean. New Phytol 2019; 221:2013-2025. [PMID: 30317659 DOI: 10.1111/nph.15541] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 10/05/2018] [Indexed: 05/26/2023]
Abstract
Symbiotic nitrogen (N2 ) fixation plays a vital role in sustainable agriculture. Efficient N2 fixation requires various materials, including phosphate (Pi); however, the molecular mechanism underlying the transport of Pi into nodules and bacteroids remains largely unknown. A nodule-localized Pi transporter, GmPT7, was functionally characterized in soybean (Glycine max) and its role in N2 fixation and yield was investigated via composite and whole transgenic plants. GmPT7 protein was localized to the plasma membrane and showed transport activity for Pi in yeast. Altered expression of GmPT7 changed 33 Pi uptake from rhizosphere and translocation to bacteroids. GmPT7 was mainly localized to the outer cortex and fixation zones of the nodules. Overexpression of GmPT7 promoted nodulation, and increased plant biomass, shoot nitrogen and phosphorus content, resulting in improved soybean yield by up to 36%. Double suppression of GmPT5 and GmPT7 led to nearly complete elimination of nodulation and over 50% reduction in plant biomass, shoot nitrogen and phosphorus content, indicating that both GmPT7 and GmPT5 contribute to Pi transport for N2 fixation. Taken together, our results indicate that GmPT7 is a transporter responsible for direct Pi entry to nodules and further to fixation zones, which is required for enhancing symbiotic N2 fixation and grain yield of soybean.
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Affiliation(s)
- Liyu Chen
- Root Biology Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
| | - Lu Qin
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Lili Zhou
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
| | - Xinxin Li
- Root Biology Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
| | - Zhichang Chen
- Root Biology Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
| | - Lili Sun
- Root Biology Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
| | - Wenfei Wang
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
| | - Zhihao Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, China
| | - Jing Zhao
- Guangdong Eco-engineering Polytechnic, Guangzhou, 510642, China
| | - Naoki Yamaji
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Mian Gu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guohua Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hong Liao
- Root Biology Center, Fujian Agriculture and Forestry University, Fuzhou, 350000, China
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40
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Liao YY, Li JL, Pan RL, Chiou TJ. Structure-Function Analysis Reveals Amino Acid Residues of Arabidopsis Phosphate Transporter AtPHT1;1 Crucial for Its Activity. Front Plant Sci 2019; 10:1158. [PMID: 31608095 PMCID: PMC6761603 DOI: 10.3389/fpls.2019.01158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 08/26/2019] [Indexed: 05/05/2023]
Abstract
Phosphorus (P), an essential plant macronutrient, is acquired in the form of inorganic phosphate (Pi) by transporters located at the plasma membrane of root cells. To decipher the Pi transport mechanism, Arabidopsis thaliana Pi transporter 1;1 (AtPHT1;1), the most predominantly H+-coupled Pi co-transporter in the root, was selected for structure-function analysis. We first predicted its secondary and tertiary structures on the basis of the Piriformospora indica Pi transporter (PiPT) and identified 28 amino acid residues potentially engaged in the activity of AtPHT1;1. We then mutagenized these residues into alanine and expressed them in the yeast pam2 mutant defective in high-affinity Pi transporters and Arabidopsis pht1;1 mutant, respectively, for functional complementation validation. We further incorporated the functional characterization and structure analyses to propose a mechanistic model for the function of AtPHT1;1. We showed that D35, D38, R134, and D144, implicated in H+ transfer across the membrane, and Y312 and N421, involved in initial interaction and translocation of Pi, are all essential for its transport activity. When Pi enters the binding pocket, the two aromatic moieties of Y145 and F169 and the hydrogen bonds generated from Q172, W304, Y312, D308, and K449 can build a scaffold to stabilize the structure. Subsequent interaction between Pi and the positive residue of K449 facilitates its release. Furthermore, D38, D93, R134, D144, D212, R216, R233, D367, K373, and E504 may form internal electrostatic interactions for structure ensemble and adaptability. This study offers a comprehensive model for elucidating the transport mechanism of a plant Pi transporter.
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Affiliation(s)
- Ya-Yun Liao
- Department of Life Science, Institute of Bioinformatics and Structural Biology, College of Life Science, National Tsing Hua University, Hsin Chu, Taiwan
| | - Jia-Ling Li
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Rong-Long Pan
- Department of Life Science, Institute of Bioinformatics and Structural Biology, College of Life Science, National Tsing Hua University, Hsin Chu, Taiwan
- *Correspondence: Tzyy-Jen Chiou, ; Rong-Long Pan,
| | - Tzyy-Jen Chiou
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
- *Correspondence: Tzyy-Jen Chiou, ; Rong-Long Pan,
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41
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Watts-Williams SJ, Cavagnaro TR, Tyerman SD. Variable effects of arbuscular mycorrhizal fungal inoculation on physiological and molecular measures of root and stomatal conductance of diverse Medicago truncatula accessions. Plant Cell Environ 2019; 42:285-294. [PMID: 29933517 DOI: 10.1111/pce.13369] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/17/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Association with arbuscular mycorrhizal fungi (AMF) can impact on plant water relations; mycorrhizal plants can exhibit increased stomatal conductance (gs ) and root hydraulic conductance (normalized to root dry weight, Lo ), and altered expression of aquaporins (AQP). Many factors regulate such responses; however, plant intraspecific diversity effects have yet to be explored. Twenty geographically diverse accessions of Medicago truncatula were inoculated with the AMF Funneliformis mosseae or mock-inoculated, and grown under well-watered conditions. Biomass, gs , shoot nutrient concentrations and mycorrhizal colonization were measured in all accessions, and Lo and gene expression in five accessions. The diverse accessions varied in physiology and gene expression; some accessions were also larger or had higher gs when colonized by F. mosseae. In the five accessions, Lo was higher in two accessions when colonized by AMF and also maintained within a much smaller range than the mock-inoculated plants. Expression of MtPIP1 correlated with both gs and Lo , and when plants were more than 3% colonized, mycorrhizal colonization correlated with Lo . Accession and AMF treatments had profound effects on M. truncatula, including several measures of plant water relations. Correlations between response variables, especially between molecular and physiological variables, across genotypes, highlight the findings of this study.
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Affiliation(s)
- Stephanie J Watts-Williams
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, South Australia, Australia
- Australian Research Council Centre of Excellence in Plant Energy Biology, The University of Adelaide, Glen Osmond, South Australia, Australia
| | - Timothy R Cavagnaro
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, South Australia, Australia
| | - Stephen D Tyerman
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, South Australia, Australia
- Australian Research Council Centre of Excellence in Plant Energy Biology, The University of Adelaide, Glen Osmond, South Australia, Australia
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42
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Becquer A, Garcia K, Amenc L, Rivard C, Doré J, Trives-Segura C, Szponarski W, Russet S, Baeza Y, Lassalle-Kaiser B, Gay G, Zimmermann SD, Plassard C. The Hebeloma cylindrosporum HcPT2 Pi transporter plays a key role in ectomycorrhizal symbiosis. New Phytol 2018; 220:1185-1199. [PMID: 29944179 DOI: 10.1111/nph.15281] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 05/28/2018] [Indexed: 05/23/2023]
Abstract
Through a mutualistic relationship with woody plant roots, ectomycorrhizal fungi provide growth-limiting nutrients, including inorganic phosphate (Pi), to their host. Reciprocal trades occur at the Hartig net, which is the symbiotic interface of ectomycorrhizas where the two partners are symplasmically isolated. Fungal Pi must be exported to the symbiotic interface, but the proteins facilitating this transfer are unknown. In the present study, we combined transcriptomic, microscopy, whole plant physiology, X-ray fluorescence mapping, 32 P labeling and fungal genetic approaches to unravel the role of HcPT2, a fungal Pi transporter, during the Hebeloma cylindrosporum-Pinus pinaster ectomycorrhizal association. We localized HcPT2 in the extra-radical hyphae and the Hartig net and demonstrated its determinant role for both the establishment of ectomycorrhizas and Pi allocation towards P. pinaster. We showed that the host plant induces HcPT2 expression and that the artificial overexpression of HcPT2 is sufficient to significantly enhance Pi export towards the central cylinder. Together, our results reveal that HcPT2 plays an important role in ectomycorrhizal symbiosis, affecting both Pi influx in the mycelium and efflux towards roots under the control of P. pinaster.
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Affiliation(s)
- Adeline Becquer
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
| | - Kevin Garcia
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD, 57007, USA
- BPMP, Université de Montpellier, CNRS, INRA, SupAgro, 34060, Montpellier, France
| | - Laurie Amenc
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
| | - Camille Rivard
- CEPIA, INRA, 44300, Nantes, France
- Synchrotron SOLEIL, 91190, Gif-sur-Yvette, France
| | - Jeanne Doré
- LEM, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 69622, Villeurbanne, France
| | - Carlos Trives-Segura
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
| | - Wojciech Szponarski
- BPMP, Université de Montpellier, CNRS, INRA, SupAgro, 34060, Montpellier, France
| | - Sylvie Russet
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
| | - Yoan Baeza
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
| | | | - Gilles Gay
- LEM, CNRS, INRA, VetAgro Sup, UCBL, Université de Lyon, 69622, Villeurbanne, France
| | | | - Claude Plassard
- Eco & Sols, Université de Montpellier, CIRAD, INRA, IRD, Montpellier SupAgro, 34060, Montpellier, France
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Deng Y, Teng W, Tong YP, Chen XP, Zou CQ. Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field. Front Plant Sci 2018; 9:1614. [PMID: 30459796 PMCID: PMC6232341 DOI: 10.3389/fpls.2018.01614] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 10/18/2018] [Indexed: 05/28/2023]
Abstract
Phosphorus (P) efficiency includes both P acquisition efficiency (PAE) and internal P utilization efficiency (PUE). Despite substantial research, genotypic variation in PAE and PUE remains incompletely understood in the field. A 2-year field study was conducted to compare PAE and PUE and related morphological, physiological, and molecular root traits of two winter wheat cultivars (Triticum aestivum L. cv. SJZ8 and KN92) in response to six P application rates in a P-deficient calcareous soil. Both cultivars showed similar growth and yield potential at each P supply level, reaching optimal growth at the same P application rate of about 100 kg P ha-1. However, the two cultivars differed in how they achieved yield and P efficiency. As P supply increased for both cultivars, root dry weight (RDW), root length density, and expression of the phosphate transporter gene TaPHT1.2 in roots initially increased and then stabilized, but arbuscular mycorrhizal fungal colonization, rhizosphere acid phosphatase activity, expressions of the P-starvation marker gene TaIPS1.1 and the purple acid phosphatase gene TaPAP16 in roots initially decreased and then stabilized. To enhance P acquisition when the P supply was deficient, KN92 modified the morphology of its roots, while SJZ8 increased the physiological activities in its roots. With an adequate P supply, high expression of TaPHT1.2 in roots might account for efficient P uptake for both cultivars, especially for KN92. Although P uptake per RDW was similar for both cultivars at anthesis, PAE was higher for KN92 than SJZ8 in terms of total P uptake in aboveground parts, whereas shoot and grain PUE were higher in SJZ8 than in KN92, mainly during the reproductive growth stage. These results indicate that P efficiency is under genotypic control at all P supply levels tested in both wheat cultivars, and that the two cultivars depend on different root strategies for P acquisition and utilization in response to changes in the P supply.
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Affiliation(s)
- Yan Deng
- Key Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security, China Agricultural University, Beijing, China
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, China
| | - Wan Teng
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Yi-Ping Tong
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xin-Ping Chen
- College of Resources and Environment, Southwest University, Chongqing, China
| | - Chun-Qin Zou
- Key Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security, China Agricultural University, Beijing, China
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Xu Y, Liu F, Li X, Cheng B. The mycorrhiza-induced maize ZmPt9 gene affects root development and phosphate availability in nonmycorrhizal plant. Plant Signal Behav 2018; 13:e1542240. [PMID: 30395788 PMCID: PMC6296386 DOI: 10.1080/15592324.2018.1542240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
The arbuscular mycorrhizal (AM)-induced ZmPt9 gene is an orthologous to some AM-inducible phosphate (Pi) transporter genes involved in Pi-starvation responses. Promoter GFP assay confirmed its transcript was localized surrounding arbuscule in arbuscule-containing cells. But this gene was not an AM fungi-specific gene. Its function in nonmycorrhizal seedlings was verified through phenotypic analysis of ZmPt9-overexpression Arabidopsis. Overexpression of ZmPt9 in Arabidopsis exhibited increased primary root length and lateral root formation. Furthermore, ZmPt9-overexpression Arabidopsis plants contained more phosphorus (P) than that of wild type. The affection of ZmPt9 in nonmycorrhizal Arabidopsis leads to the hypothesis that symbiosis-inducible genes are also involved in root development and Pi accumulation in AM-independent manner.
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Affiliation(s)
- Yunjian Xu
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
| | - Fang Liu
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
| | - Xiaoyu Li
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
| | - Beijiu Cheng
- National Engineering Laboratory of Crop Stress Resistance Breeding, Anhui Agricultural University, Hefei, China
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45
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Volpe V, Chitarra W, Cascone P, Volpe MG, Bartolini P, Moneti G, Pieraccini G, Di Serio C, Maserti B, Guerrieri E, Balestrini R. The Association With Two Different Arbuscular Mycorrhizal Fungi Differently Affects Water Stress Tolerance in Tomato. Front Plant Sci 2018; 9:1480. [PMID: 30356724 PMCID: PMC6189365 DOI: 10.3389/fpls.2018.01480] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/21/2018] [Indexed: 05/25/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi are very widespread, forming symbiotic associations with ∼80% of land plant species, including almost all crop plants. These fungi are considered of great interest for their use as biofertilizer in low-input and organic agriculture. In addition to an improvement in plant nutrition, AM fungi have been reported to enhance plant tolerance to important abiotic and biotic environmental conditions, especially to a reduced availability of resources. These features, to be exploited and applied in the field, require a thorough identification of mechanisms involved in nutrient transfer, metabolic pathways induced by single and multiple stresses, physiological and eco-physiological mechanisms resulting in improved tolerance. However, cooperation between host plants and AM fungi is often related to the specificity of symbiotic partners, the environmental conditions and the availability of resources. In this study, the impact of two AM fungal species (Funneliformis mosseae and Rhizophagus intraradices) on the water stress tolerance of a commercial tomato cultivar (San Marzano nano) has been evaluated in pots. Biometric and eco-physiological parameters have been recorded and gene expression analyses in tomato roots have been focused on plant and fungal genes involved in inorganic phosphate (Pi) uptake and transport. R. intraradices, which resulted to be more efficient than F. mosseae to improve physiological performances, was selected to assess the role of AM symbiosis on tomato plants subjected to combined stresses (moderate water stress and aphid infestation) in controlled conditions. A positive effect on the tomato indirect defense toward aphids in terms of enhanced attraction of their natural enemies was observed, in agreement with the characterization of volatile organic compound (VOC) released. In conclusion, our results offer new insights for understanding the molecular and physiological mechanisms involved in the tolerance toward water deficit as mediated by a specific AM fungus. Moreover, they open new perspectives for the exploitation of AM symbiosis to enhance crop tolerance to abiotic and biotic stresses in a scenario of global change.
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Affiliation(s)
- Veronica Volpe
- Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
| | - Walter Chitarra
- Council for Agricultural Research and Economics, Centre of Viticulture and Enology Research, Conegliano, Italy
| | - Pasquale Cascone
- National Research Council, Institute for Sustainable Plant Protection, Turin-Florence-Portici (NA) Units, Portici, Italy
| | | | - Paola Bartolini
- National Research Council, Institute for Sustainable Plant Protection, Turin-Florence-Portici (NA) Units, Portici, Italy
| | - Gloriano Moneti
- Department of Health Sciences, University of Florence, Florence, Italy
| | | | - Claudia Di Serio
- Geriatric Intensive Care Unit, Experimental and Clinical Medicine Department, University of Florence, AOU Careggi, Florence, Italy
| | - Biancaelena Maserti
- National Research Council, Institute for Sustainable Plant Protection, Turin-Florence-Portici (NA) Units, Portici, Italy
| | - Emilio Guerrieri
- National Research Council, Institute for Sustainable Plant Protection, Turin-Florence-Portici (NA) Units, Portici, Italy
| | - Raffaella Balestrini
- National Research Council, Institute for Sustainable Plant Protection, Turin-Florence-Portici (NA) Units, Portici, Italy
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46
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Firmenich CS, Elfers K, Wilkens MR, Breves G, Muscher-Banse AS. Modulation of renal calcium and phosphate transporting proteins by dietary nitrogen and/or calcium in young goats. J Anim Sci 2018; 96:3208-3220. [PMID: 29741700 PMCID: PMC6095294 DOI: 10.1093/jas/sky185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 05/07/2018] [Indexed: 12/24/2022] Open
Abstract
In young goats, a reduction in dietary nitrogen (N) had an impact on mineral homeostasis although ruminants are able to recycle N effectively due to rumino-hepatic circulation. A solitary calcium (Ca) reduction stimulated calcitriol synthesis and Ca concentrations remained unchanged, whereas a dietary N reduction led to a decrease in calcitriol, which could not be prevented by a simultaneous reduction of N and Ca. In a previous study, it was shown that a reduced dietary N intake caused a decrease in intestinal Ca absorption due to a reduction of intestinal Ca transporting proteins. As no data on the potential role of the kidneys are available, it was the aim of the present study to evaluate whether an N- and/or Ca-reduced diet had an impact on renal Ca and phosphate (Pi) transporting protein expression in young goats. The animals were divided into 4 feeding groups, each receiving an adequate N and Ca supply, a reduced N supply, a reduced Ca supply, or a combined N and Ca reduction for 6 to 9 wk. The protein expression of the renal Ca channel transient receptor potential cation channel subfamily V member 5 (TRPV5) was diminished in N-reduced fed goats (P = 0.03), whereas in Ca restricted animals, the expression remained unaltered. The mRNA and protein expression of the Ca-binding protein calbindin-D28K (CaBPD28K) and the sodium-Ca exchanger 1 (NCX1) were significantly decreased due to the N-reduced feeding (mRNA, P = 0.003; P < 0.0001; protein, P = 0.002; P = 0.02), whereas dietary Ca reduction increased the CaBPD28K and NCX1 mRNA expression (P = 0.05; P = 0.01). The mRNA and protein expression of the parathyroid hormone receptor (PTHR) decreased due to the N-reduced feeding (P = 0.02; P = 0.03). These results confirm that a reduced dietary N intake led to decreased TRPV5, CaBPD28K, PTHR, and NCX1 expression levels, contributing to low levels of calcitriol and plasma Ca. In contrast to this, sodium-phosphate cotransporter type IIa expression and plasma Pi concentration were increased during dietary N reduction, thus indicating that Pi homeostasis is modulated in a calcitriol-independent manner. In conclusion, the modulation of Ca transporting proteins expression in the kidney is not able to prevent changes in mineral homeostasis in young goats receiving an N-reduced diet.
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Affiliation(s)
- C S Firmenich
- Department of Physiology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - K Elfers
- Department of Physiology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - M R Wilkens
- Department of Physiology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - G Breves
- Department of Physiology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - A S Muscher-Banse
- Department of Physiology, University of Veterinary Medicine Hannover, Hannover, Germany
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47
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Garg A, Sanchez AM, Shuman S, Schwer B. A long noncoding (lnc)RNA governs expression of the phosphate transporter Pho84 in fission yeast and has cascading effects on the flanking prt lncRNA and pho1 genes. J Biol Chem 2018; 293:4456-4467. [PMID: 29414789 DOI: 10.1074/jbc.ra117.001352] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 01/16/2018] [Indexed: 11/06/2022] Open
Abstract
The expression of the phosphate transporter Pho84 in fission yeast Schizosaccharomyces pombe is repressed in phosphate-rich medium and induced during phosphate starvation. Two other phosphate-responsive genes in S. pombe (pho1 and tgp1) had been shown to be repressed in cis by transcription of a long noncoding (lnc) RNA from the upstream flanking gene, but whether pho84 expression is regulated in this manner is unclear. Here, we show that repression of pho84 is enforced by transcription of the SPBC8E4.02c locus upstream of pho84 to produce a lncRNA that we name prt2 ( pho-repressive transcript 2). We identify two essential elements of the prt2 promoter, a HomolD box and a TATA box, mutations of which inactivate the prt2 promoter and de-repress the downstream pho84 promoter under phosphate-replete conditions. We find that prt2 promoter inactivation also elicits a cascade effect on the adjacent downstream prt (lncRNA) and pho1 (acid phosphatase) genes, whereby increased pho84 transcription down-regulates prt lncRNA transcription and thereby de-represses pho1 Our results establish a unified model for the repressive arm of fission yeast phosphate homeostasis, in which transcription of prt2, prt, and nc-tgp1 lncRNAs interferes with the promoters of the flanking pho84, pho1, and tgp1 genes, respectively.
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Affiliation(s)
- Angad Garg
- From the Molecular Biology Program, Sloan-Kettering Institute, New York and
| | - Ana M Sanchez
- the Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065
| | - Stewart Shuman
- From the Molecular Biology Program, Sloan-Kettering Institute, New York and
| | - Beate Schwer
- the Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065
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48
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Liu C, Su J, Stephen GK, Wang H, Song A, Chen F, Zhu Y, Chen S, Jiang J. Overexpression of Phosphate Transporter Gene CmPht1;2 Facilitated Pi Uptake and Alternated the Metabolic Profiles of Chrysanthemum Under Phosphate Deficiency. Front Plant Sci 2018; 9:686. [PMID: 30079072 PMCID: PMC6062769 DOI: 10.3389/fpls.2018.00686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 05/04/2018] [Indexed: 05/21/2023]
Abstract
Low availability of phosphorus (P) in the soil is the principal limiting factor for the growth of cut chrysanthemum. Plant phosphate transporters (PTs) facilitate acquisition of inorganic phosphate (Pi) and its homeostasis within the plant. In the present study, CmPht1;2 of the Pht1 family was cloned from chrysanthemum. CmPht1;2 is composed of 12 transmembrane domains and localized to the plasma membrane. Expression of CmPht1;2 in roots was induced by Pi starvation. Chrysanthemum plants with overexpression of CmPht1;2 (Oe) showed higher Pi uptake, as compared to the wild type (WT), both under Pi-starvation and Pi-sufficient conditions, and also showed a higher root biomass compared to WT in the Pi-starvation conditions. Seven days after the P-deficiency treatment, 85 distinct analytes were identified in the roots and 27 in the shoots between the Oe1 plant and WT, in which sophorose, sorbitol (sugars), hydroxybutyric acid (organic acids), and ornithine (amino acid) of CmPht1;2 overexpressing chrysanthemum are specific responses to P-starvation.
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Affiliation(s)
- Chen Liu
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Jiangshuo Su
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Githeng’u K. Stephen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Haibin Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Aiping Song
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Fadi Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
| | - Yiyong Zhu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China
| | - Sumei Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
- *Correspondence: Sumei Chen, Jiafu Jiang,
| | - Jiafu Jiang
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
- Key Laboratory of Landscape Agriculture, Ministry of Agriculture, Nanjing, China
- *Correspondence: Sumei Chen, Jiafu Jiang,
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49
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Baek D, Chun HJ, Yun DJ, Kim MC. Cross-talk between Phosphate Starvation and Other Environmental Stress Signaling Pathways in Plants. Mol Cells 2017; 40:697-705. [PMID: 29047263 PMCID: PMC5682247 DOI: 10.14348/molcells.2017.0192] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/21/2017] [Accepted: 09/30/2017] [Indexed: 01/22/2023] Open
Abstract
The maintenance of inorganic phosphate (Pi) homeostasis is essential for plant growth and yield. Plants have evolved strategies to cope with Pi starvation at the transcriptional, post-transcriptional, and post-translational levels, which maximizes its availability. Many transcription factors, miRNAs, and transporters participate in the Pi starvation signaling pathway where their activities are modulated by sugar and phytohormone signaling. Environmental stresses significantly affect the uptake and utilization of nutrients by plants, but their effects on the Pi starvation response remain unclear. Recently, we reported that Pi starvation signaling is affected by abiotic stresses such as salt, abscisic acid, and drought. In this review, we identified transcription factors, such as MYB, WRKY, and zinc finger transcription factors with functions in Pi starvation and other environmental stress signaling. In silico analysis of the promoter regions of Pi starvation-responsive genes, including phosphate transporters, microRNAs, and phosphate starvation-induced genes, suggest that their expression may be regulated by other environmental stresses, such as hormones, drought, cold, heat, and pathogens as well as by Pi starvation. Thus, we suggest the possibility of cross-talk between Pi starvation signaling and other environmental stress signaling pathways.
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Affiliation(s)
- Dongwon Baek
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828,
Korea
| | - Hyun Jin Chun
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828,
Korea
| | - Dae-Jin Yun
- Department of Biomedical Science and Engineering, Konkuk University, Seoul 05029,
Korea
| | - Min Chul Kim
- Division of Applied Life Science (BK21 PLUS), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 52828,
Korea
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828,
Korea
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50
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Taglia I, Formichi P, Battisti C, Peppoloni G, Barghigiani M, Tessa A, Federico A. Primary familial brain calcification with a novel SLC20A2 mutation: Analysis of PiT-2 expression and localization. J Cell Physiol 2017; 233:2324-2331. [PMID: 28722801 DOI: 10.1002/jcp.26104] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/18/2017] [Indexed: 12/11/2022]
Abstract
Primary familial brain calcification (PFBC) is an autosomal dominant rare disorder characterized by bilateral and symmetric brain calcifications, and neuropsychiatric manifestations. Four genes have been linked to PFBC: SLC20A2, PDGFRB, PDGFB, and XPR1. In this study, we report molecular and clinical data of a PFBC patient carrying a novel SLC20A2 mutation and we investigate the impact of the mutation on PiT-2 expression and function. Sanger sequencing of SLC20A2, PDGFRB, PDGFB, XPR1 led to the identification of a novel duplication of twelve nucleotides (c.1876_1887dup/ p.Trp626_Thr629dup) in SLC20A2 gene. SLC20A2 encodes for a cell membrane transporter (PiT-2) involved in maintenance of inorganic phosphate homeostasis. We performed an analysis of expression and functionality of PiT-2 protein in patient primary cultured fibroblasts. In patient fibroblasts, the mutation does not affect PiT-2 expression but alter sub-cellular localization. The Pi-uptake assay revealed a less Pi depletion in patient than in control fibroblasts, suggesting that SLC20A2 duplication may impair Pi internalization. This is the first study reporting sub-cellular expression analysis of mutant PiT-2 in primary cultured fibroblasts from a PFBC patient, showing that p.Trp626_Thr629dup in SLC20A2 alters PiT-2 sub-cellular localization and reduces Pi-uptake, leading to onset of PFBC in our patient.
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Affiliation(s)
- Ilaria Taglia
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Patrizia Formichi
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Carla Battisti
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Giulia Peppoloni
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | | | - Alessandra Tessa
- Molecular Medicine and Neurogenetics, IRCCS Stella Maris, Pisa, Italy
| | - Antonio Federico
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
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