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Kim J, Lee JG, Hong Y, Lee EJ. Analysis of eight phytohormone concentrations, expression levels of ABA biosynthesis genes, and ripening-related transcription factors during fruit development in strawberry. J Plant Physiol 2019; 239:52-60. [PMID: 31185317 DOI: 10.1016/j.jplph.2019.05.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 10/02/2018] [Revised: 05/26/2019] [Accepted: 05/29/2019] [Indexed: 05/25/2023]
Abstract
The contents of eight phytohormones and the expression levels of genes encoding enzymes related to abscisic acid (ABA) biosynthesis and deactivation/degradation and transcription factors (TFs) related to fruit ripening were studied in the non-climacteric strawberry fruit (Fragaria × ananassa Duch., cv. 'Seolhyang') at six developmental stages. The hormones tested were ABA, indole-3-acetic acid (IAA), gibberellic acid 4 (GA4), jasmonic acid (JA), methyljasmonate (MJ), jasmonoyl isoleucine (JA-Ile), salicylic acid (SA), and ethylene (ET). The developmental and ripening stages studied were small green (S1, 11 days post-anthesis, DPA), green (S2, 20 DPA), breaker (S3, 24 DPA), pink (S4, 27 DPA), red (S5, 31 DPA), and fully red (S6, 40 DPA). IAA and GA4 contents were highest at S1 and gradually decreased after this stage. ABA content was low at S1-S3 and then increased rapidly until peaking at S6. By contrast, MJ content showed no significant changes over time, while SA content gradually increased. JA, JA-Ile, and ET contents were either insufficient for quantification or undetectable. Expression of the ABA biosynthesis genes FaNCED1 and FaABA2 increased during fruit ripening, whereas expression of the ABA deactivation/degradation genes FaUGT75C1 and FaCYP707A1 was high early in development, when ABA content was low, and then decreased. Among four ripening-related TF genes, FaMYB1, FaMYB5, FaMYB10, and FaASR, only the expression of FaMYB10 seemed to be closely related to strawberry fruit ripening. Our study supports the idea that ABA and FaMYB10 appear to be the key hormone and TF regulating strawberry ripening.
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Affiliation(s)
- Joonggon Kim
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jeong Gu Lee
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Yoonpyo Hong
- National Institute of Horticultural and Herbal Science, Rural Development Administration, 55365 Wanju-gun, Republic of Korea
| | - Eun Jin Lee
- Department of Plant Science, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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2
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Zhu Z, Li G, Yan C, Liu L, Zhang Q, Han Z, Li B. DRL1, Encoding A NAC Transcription Factor, Is Involved in Leaf Senescence in Grapevine. Int J Mol Sci 2019; 20:ijms20112678. [PMID: 31151316 PMCID: PMC6600502 DOI: 10.3390/ijms20112678] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 05/07/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 01/01/2023] Open
Abstract
The NAC (for NAM, ATAF1,2, and CUC2) proteins family are plant-specific transcription factors, which play important roles in leaf development and response to environmental stresses. In this study, an NAC gene, DRL1, isolated from grapevine Vitis vinifera L. "Yatomi Rose", was shown to be involved in leaf senescence. The quantity of DRL1 transcripts decreased with advancing leaf senescence in grapevine. Overexpressing the DRL1 gene in tobacco plants significantly delayed leaf senescence with respect to chlorophyll concentration, potential quantum efficiency of photosystem II (Fv/Fm), and ion leakage. Moreover, exogenous abscisic acid (ABA) markedly reduced the expression of DRL1, and the ABA and salicylic acid (SA) concentration was lower in the DRL1-overexpressing transgenic plants than in the wild-type plants. The DRL1 transgenic plants exhibited reduced sensitivity to ABA-induced senescence but no significant change in the sensitivity to jasmonic acid-, SA- or ethylene-induced senescence. Transcriptomic analysis and RNA expression studies also indicated that the transcript abundance of genes associated with ABA biosynthesis and regulation, including 9-cis-epoxycarotenoid dioxygenase (NCED1), NCED5, zeaxanthin epoxidase1 (ZEP1), ABA DEFICIENT2 (ABA2), ABA4, and ABA INSENSITIVE 2 (ABI2), was markedly reduced in the DRL1-overexpressing plants. These results suggested that DRL1 plays a role as a negative regulator of leaf senescence by regulating ABA synthesis.
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Affiliation(s)
- Ziguo Zhu
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Guirong Li
- College of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China.
| | - Chaohui Yan
- College of Horticulture and Landscape Architecture, Henan Institute of Science and Technology, Xinxiang 453003, China.
| | - Li Liu
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Qingtian Zhang
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Zhen Han
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
| | - Bo Li
- Shandong Institute of Pomology, Shandong Academy of Agricultural Science, No 66 Longtan Road, Taian 271000, China.
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Liang Y, Jiang Y, Du M, Li B, Chen L, Chen M, Jin D, Wu J. ZmASR3 from the Maize ASR Gene Family Positively Regulates Drought Tolerance in Transgenic Arabidopsis. Int J Mol Sci 2019; 20:E2278. [PMID: 31072025 PMCID: PMC6539908 DOI: 10.3390/ijms20092278] [Citation(s) in RCA: 22] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/04/2019] [Accepted: 05/06/2019] [Indexed: 01/08/2023] Open
Abstract
Abscisic acid (ABA)-, stress-, and ripening-induced (ASR) proteins are reported to be involved in drought stress responses. However, the function of maize ASR genes in enhancing drought tolerance is not known. Here, nine maize ASR members were cloned, and the molecular features of these genes were analyzed. Phenotype results of overexpression of maize ZmASR3 gene in Arabidopsis showed lower malondialdehyde (MDA) levels and higher relative water content (RWC) and proline content than the wild type under drought conditions, demonstrating that ZmASR3 can improve drought tolerance. Further experiments showed that ZmASR3-overexpressing transgenic lines displayed increased stomatal closure and reduced reactive oxygen species (ROS) accumulation by increasing the enzyme activities of superoxide dismutase (SOD) and catalase (CAT) under drought conditions. Moreover, overexpression of ZmASR3 in Arabidopsis increased ABA content and reduced sensitivity to exogenous ABA in both the germination and post-germination stages. In addition, the ROS-related, stress-responsive, and ABA-dependent pathway genes were activated in transgenic lines under drought stress. Taken together, these results suggest that ZmASR3 acts as a positive regulator of drought tolerance in plants.
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Affiliation(s)
- Yani Liang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Yingli Jiang
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Ming Du
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Baoyan Li
- Institute of Plant Protection, Yantai Academy of Agricultural Sciences, Yantai 265500, China.
| | - Long Chen
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Mingchao Chen
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Demiao Jin
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
| | - Jiandong Wu
- National Engineering Laboratory of Crop Stress Resistance Breeding, School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
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Wang M, Qu H, Zhang H, Liu S, Li Y, Zhang C. Hormone and RNA-seq analyses reveal the mechanisms underlying differences in seed vigour at different maize ear positions. Plant Mol Biol 2019; 99:461-476. [PMID: 30710225 DOI: 10.1007/s11103-019-00830-0] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
ABA/GA4 ratio, stress resistance, carbon and nitrogen metabolism, and chromatin structure play important roles in vigour differences of seeds located at different maize ear positions. Seed vigour, which ensures rapid and uniform field emergence across diverse environments, differs at different maize ear positions. However, little is known regarding the associated mechanisms. In this study, we determined that seed vigour, stress resistance, and carbon and nitrogen metabolism were higher in seeds from middle and bottom section of the ear, while the ABA/GA4 ratio in the embryos was significantly lower. Compared with the seeds subjected to repeated pollination during silking, less variation in seed vigour and the ABA/GA4 ratio in the embryos was observed in seeds at different ear positions subjected to single pollination after complete silking. This indicated that single pollination can reduce, but not eliminate, the differences in seed vigour at different ear positions. RNA-seq analysis indicated that the seed vigour differences at the different locations of the maize ears of the single pollinated treatment were related to carbon and nitrogen metabolism. In contrast, the differences in seed vigour under repeated pollination were related to chromatin structure. The present study contributes to our understanding of the mechanisms underlying differences in seed vigour at different positions on the maize ear.
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Affiliation(s)
- Mingming Wang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Haibin Qu
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Huidi Zhang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Shuai Liu
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China
| | - Yan Li
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China.
| | - Chunqing Zhang
- State Key Laboratory of Crop Biology, Agronomy College, Shandong Agricultural University, Taian, 271018, China.
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Rezaul IM, Baohua F, Tingting C, Weimeng F, Caixia Z, Longxing T, Guanfu F. Abscisic acid prevents pollen abortion under high-temperature stress by mediating sugar metabolism in rice spikelets. Physiol Plant 2019; 165:644-663. [PMID: 29766507 DOI: 10.1111/ppl.12759] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 04/22/2018] [Accepted: 05/11/2018] [Indexed: 05/20/2023]
Abstract
Heat stress at the pollen mother cell (PMC) meiotic stage leads to pollen sterility in rice, in which the reactive oxygen species (ROS) and sugar homeostasis are always adversely affected. This damage is reversed by abscisic acid (ABA), but the mechanisms underlying the interactions among the ABA, sugar metabolism, ROS and heat shock proteins in rice spikelets under heat stress are unclear. Two rice genotypes, Zhefu802 (a recurrent parent) and fgl (its near-isogenic line) were subjected to heat stress of 40°C after pre-foliage sprayed with ABA and its biosynthetic inhibitor fluridone at the meiotic stage of PMC. The results revealed that exogenous application of ABA reduced pollen sterility caused by heat stress. This was achieved through various means, including: increased levels of soluble sugars, starch and non-structural carbohydrates, markedly higher relative expression levels of heat shock proteins (HSP24.1 and HSP71.1) and genes related to sugar metabolism and transport, such as sucrose transporters (SUT) genes, sucrose synthase (SUS) genes and invertase (INV) genes as well as increased antioxidant activities and increased content of adenosine triphosphate and endogenous ABA in spikelets. In short, exogenous application of ABA prior to heat stress enhanced sucrose transport and accelerated sucrose metabolism to maintain the carbon balance and energy homeostasis, thus ABA contributed to heat tolerance in rice.
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Affiliation(s)
- Islam Md Rezaul
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
- Department of Agricultural Extension, Ministry of Agriculture, Dhaka 1215, Bangladesh
| | - Feng Baohua
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Chen Tingting
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Fu Weimeng
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Zhang Caixia
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Tao Longxing
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Fu Guanfu
- National Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
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Wang Y, Liu X, Su H, Yin S, Han C, Hao D, Dong X. The regulatory mechanism of chilling-induced dormancy transition from endo-dormancy to non-dormancy in Polygonatum kingianum Coll.et Hemsl rhizome bud. Plant Mol Biol 2019; 99:205-217. [PMID: 30627860 DOI: 10.1007/s11103-018-0812-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 07/15/2018] [Accepted: 12/11/2018] [Indexed: 05/27/2023]
Abstract
We identified three dormant stages of Polygonatum kingianum and changes that occurred during dormancy transition in the following aspects including cell wall and hormones, as well as interaction among them. Polygonatum kingianum Coll.et Hemsl (P. kingianum) is an important traditional Chinese medicine, but the mechanism of its rhizome bud dormancy has not yet been studied systematically. In this study, three dormancy phases were induced under controlled conditions, and changes occurring during the transition were examined, focusing on phytohormones and the cell wall. As revealed by HPLC-MS (High Performance Liquid Chromatography-Mass Spectrometry) analysis, the endo- to non-dormancy transition was association with a reduced abscisic acid (ABA)/gibberellin (GA3) ratio, a decreased level of auxin (IAA) and an increased level of trans-zeatin (tZR). Transmission electron microscopy showed that plasmodesmata (PDs) and the cell wall of the bud underwent significant changes between endo- and eco-dormancy. A total of 95,462 differentially expressed genes (DEGs) were identified based on transcriptomics, and clustering and principal component analysis confirmed the different physiological statuses of the three types of bud samples. Changes in the abundance of transcripts associated with IAA, cytokinins (CTKs), GA, ABA, brassinolide (BR), jasmonic acid (JA), ethylene, salicylic acid (SA), PDs and cell wall-loosening factors were analysed during the bud dormancy transition in P. kingianum. Furthermore, nitrilase 4 (NIT4) and tryptophan synthase alpha chain (TSA1), which are related to IAA synthesis, were identified as hub genes of the co-expression network, and strong interactions between hormones and cell wall-related factors were observed. This research will provide a good model for chilling-treated rhizome bud dormancy in P. kingianum and cultivation of this plant.
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Affiliation(s)
- Yue Wang
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - Xiaoqing Liu
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - He Su
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - Shikai Yin
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - Caixia Han
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - Dandan Hao
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China
| | - Xuehui Dong
- College of Agronomy and Biotechnology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing, China.
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Waadt R, Jawurek E, Hashimoto K, Li Y, Scholz M, Krebs M, Czap G, Hong-Hermesdorf A, Hippler M, Grill E, Kudla J, Schumacher K. Modulation of ABA responses by the protein kinase WNK8. FEBS Lett 2019; 593:339-351. [PMID: 30556127 DOI: 10.1002/1873-3468.13315] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 12/02/2018] [Accepted: 12/11/2018] [Indexed: 12/31/2022]
Abstract
Abscisic acid (ABA) regulates growth and developmental processes in response to limiting water conditions. ABA functions through a core signaling pathway consisting of PYR1/PYL/RCAR ABA receptors, type 2C protein phosphatases (PP2Cs), and SnRK2-type protein kinases. Other signaling modules might converge with ABA signals through the modulation of core ABA signaling components. We have investigated the role of the protein kinase WNK8 in ABA signaling. WNK8 interacted with PP2CA and PYR1, phosphorylated PYR1 in vitro, and was dephosphorylated by PP2CA. A hypermorphic wnk8-ct Arabidopsis mutant allele suppressed ABA and glucose hypersensitivities of pp2ca-1 mutants during young seedling development, and WNK8 expression in protoplasts suppressed ABA-induced reporter gene expression. We conclude that WNK8 functions as a negative modulator of ABA signaling.
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Affiliation(s)
- Rainer Waadt
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
| | - Esther Jawurek
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
| | - Kenji Hashimoto
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische-Wilhelms-Universität Münster, Germany
| | - Yan Li
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
| | - Martin Scholz
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische-Wilhelms-Universität Münster, Germany
| | - Melanie Krebs
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
| | - Gereon Czap
- Lehrstuhl für Botanik, Technische Universität München, Freising, Germany
| | - Anne Hong-Hermesdorf
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
| | - Michael Hippler
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische-Wilhelms-Universität Münster, Germany
| | - Erwin Grill
- Lehrstuhl für Botanik, Technische Universität München, Freising, Germany
| | - Jörg Kudla
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische-Wilhelms-Universität Münster, Germany
| | - Karin Schumacher
- Department of Cell Biology, Centre for Organismal Studies, Ruprecht-Karls-Universität Heidelberg, Germany
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Liu T, Zhou T, Lian M, Liu T, Hou J, Ijaz R, Song B. Genome-Wide Identification and Characterization of the AREB/ABF/ABI5 Subfamily Members from Solanum tuberosum. Int J Mol Sci 2019; 20:E311. [PMID: 30646545 PMCID: PMC6358972 DOI: 10.3390/ijms20020311] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 12/13/2018] [Revised: 01/01/2019] [Accepted: 01/10/2019] [Indexed: 12/16/2022] Open
Abstract
Abscisic acid (ABA) plays crucial roles in plant development and adaption to environmental stresses. The ABA-responsive element binding protein/ABRE-binding factor and ABA INSENSITIVE 5 (AREB/ABF/ABI5) gene subfamily members, which belong to the basic domain/leucine zipper (bZIP) transcription factors family, participate in the ABA-mediated signaling pathway by regulating the expression of their target genes. However, information about potato (Solanum tuberosum) AREB/ABF/ABI5 subfamily members remains scarce. Here, seven putative AREB/ABF/ABI5 members were identified in the potato genome. Sequences alignment revealed that these members shared high protein sequence similarity, especially in the bZIP region, indicating that they might possess overlapping roles in regulating gene expression. Subcellular localization analysis illustrated that all seven AREB/ABF/ABI5 members were localized in the nucleus. Transactivation activity assays in yeast demonstrated that these AREB/ABF/ABI5 members possessed distinct transcriptional activity. Electrophoretic mobility shift assays (EMSA) confirmed that all of these AREB/ABF/ABI5 members could have an affinity to ABRE in vitro. The expression patterns of these AREB/ABF/ABI5 genes showed that they were in response to ABA or osmotic stresses in varying degrees. Moreover, most AREB/ABF/ABI5 genes were induced during stolon swelling. Overall, these results provide the first comprehensive identification of the potato AREB/ABF/ABI5 subfamily and would facilitate further functional characterization of these subfamily members in future work.
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Affiliation(s)
- Tengfei Liu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
| | - Tingting Zhou
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
| | - Meiting Lian
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
| | - Tiantian Liu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
| | - Juan Hou
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
- College of Horticulture, Henan Agricultural University, Zhengzhou 450002, China.
| | - Raina Ijaz
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
| | - Botao Song
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China.
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Wang P, Chen D, Zheng Y, Jin S, Yang J, Ye N. Identification and Expression Analyses of SBP-Box Genes Reveal Their Involvement in Abiotic Stress and Hormone Response in Tea Plant ( Camellia sinensis). Int J Mol Sci 2018; 19:ijms19113404. [PMID: 30380795 PMCID: PMC6274802 DOI: 10.3390/ijms19113404] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 09/14/2018] [Revised: 10/26/2018] [Accepted: 10/28/2018] [Indexed: 11/23/2022] Open
Abstract
The SQUAMOSA promoter binding protein (SBP)-box gene family is a plant-specific transcription factor family. This family plays a crucial role in plant growth and development. In this study, 20 SBP-box genes were identified in the tea plant genome and classified into six groups. The genes in each group shared similar exon-intron structures and motif positions. Expression pattern analyses in five different tissues demonstrated that expression in the buds and leaves was higher than that in other tissues. The cis-elements and expression patterns of the CsSBP genes suggested that the CsSBP genes play active roles in abiotic stress responses; these responses may depend on the abscisic acid (ABA), gibberellic acid (GA), and methyl jasmonate (MeJA) signaling pathways. Our work provides a comprehensive understanding of the CsSBP family and will aid in genetically improving tea plants.
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Affiliation(s)
- Pengjie Wang
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Di Chen
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Yucheng Zheng
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Shan Jin
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Jiangfan Yang
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Naixing Ye
- College of Horticulture, Key Laboratory of Tea Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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10
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Pérez FJ, Noriega X. Sprouting of paradormant and endodormant grapevine buds under conditions of forced growth: similarities and differences. Planta 2018; 248:837-847. [PMID: 29936547 DOI: 10.1007/s00425-018-2941-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 01/12/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
Bud-break assays under forced growth conditions suggest that a drop in ABA content and an increase in sugars are common features in the sprouting of paradormant (PD) and endodormant (ED) grapevine buds. However, increases in cell division and in respiration are unique characteristics of the ED budding. In tropical and subtropical regions where the variations in day length and temperatures are minor throughout the year, the rupture of grapevine buds can be achieved during the current growing season given rise to a double-cropping system annually. However, it is unknown whether the breaking buds are in the paradormancy (PD) or endodormancy (ED) stage. In this study, we compared the breakage of PD and ED buds under conditions of forced growth. To do this, the expression of genes related to the metabolism of phytohormones and sugars, and of relevant physiological functions such as respiration and cell division was analyzed temporally throughout the incubation period in both types of buds. An early fall in the expression of the ABA biosynthesis gene (VvNCED1) and increases in genes related to sugar metabolism and transports were observed during the incubation period in both types of buds. However, while in the PD buds, the genes related to respiration and the cell cycle did not undergo significant changes in their expression during the incubation period, in the ED buds, the expression of these genes together with those related to auxin and cytokinin biosynthesis experienced a large increase. The results suggest that a drop in ABA content and an increase in sugars are early signals for the onset of bud break in both PD and ED vines, while the increase in respiration and cell division are unique characteristics of the ED buds, which reflect its transition from a resting state to a state of active growth.
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Affiliation(s)
- Francisco J Pérez
- Fac. Ciencias, Lab. de Bioquímica Vegetal, Universidad de Chile, Casilla 653, Santiago, Chile.
| | - Ximena Noriega
- Fac. Ciencias, Lab. de Bioquímica Vegetal, Universidad de Chile, Casilla 653, Santiago, Chile
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11
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Cheng H, Chen X, Fang J, An Z, Hu Y, Huang H. Comparative transcriptome analysis reveals an early gene expression profile that contributes to cold resistance in Hevea brasiliensis (the Para rubber tree). Tree Physiol 2018; 38:1409-1423. [PMID: 29474681 DOI: 10.1093/treephys/tpy014] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Accepted: 01/26/2018] [Indexed: 06/08/2023]
Abstract
The rubber tree (Hevea brasiliensis Muell. Arg) is a tropical, perennial, woody plant that is susceptible to cold stress. In China, cold stress has been found to severely damage rubber plants in plantations in past decades. Although several Hevea clones that are resistant to cold have been developed, their cold hardiness mechanism has yet to be elucidated. For the study reported herein, we subjected the cold-resistant clone CATAS93-114 and the cold-sensitive clone Reken501 to chilling stress, and characterized their transcriptomes at 0, 2, 8 and 24 h after the start of chilling. We found that 7870 genes were differentially expressed in the transcriptomes of the two clones. In CATAS93-114, a greater number of genes were found to be up- or downregulated between 2 h and 8 h than in Reken501, which indicated a more rapid and intensive response by CATAS93-114 than by Reken501. The differentially expressed genes were grouped into seven major clusters, according to their Gene Ontology terms. The expression profiles for genes involved in abscisic acid metabolism and signaling, in an abscisic acid-independent pathway, and in early signal perception were found to have distinct expression patterns for the transcriptomes of the two clones. The differential expression of 22 genes that appeared to have central roles in response to chilling was confirmed by quantitative real-time PCR.
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Affiliation(s)
- Han Cheng
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
| | - Xiang Chen
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
| | - Jialin Fang
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
| | - Zewei An
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
| | - Yanshi Hu
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
| | - Huasun Huang
- Key Laboratory of Rubber Biology, Ministry of Agriculture, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou, Hainan, People's Republic of China
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12
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Ye G, Ma Y, Feng Z, Zhang X. Transcriptomic analysis of drought stress responses of sea buckthorn (Hippophae rhamnoidessubsp. sinensis) by RNA-Seq. PLoS One 2018; 13:e0202213. [PMID: 30102736 PMCID: PMC6089444 DOI: 10.1371/journal.pone.0202213] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 07/29/2018] [Indexed: 12/15/2022] Open
Abstract
Sea buckthorn is one of the most important eco-economic tree species in China due to its ability to grow and produce acceptable yields under limited water and fertilizer availability. In this study, the differentially expressed genes under drought stress (DS) of sea buckthorn were identified and compared with control (CK) by RNA-Seq. A total of 122,803 unigenes were identified in sea buckthorn, and 70,025 unigenes significantly matched a sequence in at least one of the seven databases. A total of 24,060 (19.59%) unigenes can be assigned to 19 KEGG pathways, and 1,644 unigenes were differentially expressed between DS and CK, of which 519 unigenes were up-regulated and 1,125 unigenes down-regulated. Of the 47 significantly enriched GO terms, 14, 7 and 26 items were related to BP, CC and MF, respectively. KEGG enrichment analysis showed 398 DEGs involved in 97 different pathways, of which 119 DEGs were up-regulated and 279 DEGs were down-regulated under drought stress. In addition, we found 4438 transcriptor factors (TFs) in sea buckthorn, of which 100 were differentially expressed between DS and CK. These results lay a first foundation for further investigations of the very specific functions of these unigenes in sea buckthorn in response to drought stress.
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Affiliation(s)
- Guisheng Ye
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Yuhua Ma
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
- * E-mail:
| | - Zhipeng Feng
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Xiaofen Zhang
- State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
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13
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Wu R, Duan L, Pruneda-Paz JL, Oh DH, Pound M, Kay S, Dinneny JR. The 6xABRE Synthetic Promoter Enables the Spatiotemporal Analysis of ABA-Mediated Transcriptional Regulation. Plant Physiol 2018; 177:1650-1665. [PMID: 29884679 PMCID: PMC6084650 DOI: 10.1104/pp.18.00401] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/16/2018] [Indexed: 05/17/2023]
Abstract
The water stress-associated hormone abscisic acid (ABA) acts through a well-defined signal transduction cascade to mediate downstream transcriptional events important for acclimation to stress. Although ABA signaling is known to function in specific tissues to regulate root growth, little is understood regarding the spatial pattern of ABA-mediated transcriptional regulation. Here, we describe the construction and evaluation of an ABSCISIC ACID RESPONSIVE ELEMENT (ABRE)-based synthetic promoter reporter that reveals the transcriptional response of tissues to different levels of exogenous ABA and stresses. Genome-scale yeast one-hybrid screens complemented these approaches and revealed how promoter sequence and architecture affect the recruitment of diverse transcription factors (TFs) to the ABRE. Our analysis also revealed ABA-independent activity of the ABRE-reporter under nonstress conditions, with expression being enriched at the quiescent center and stem cell niche. We show that the WUSCHEL RELATED HOMEOBOX5 and NAC DOMAIN PROTEIN13 TFs regulate QC/SCN expression of the ABRE reporter, which highlights the convergence of developmental and DNA-damage signaling pathways onto this cis-element in the absence of water stress. This work establishes a tool to study the spatial pattern of ABA-mediated transcriptional regulation and a repertoire of TF-ABRE interactions that contribute to the developmental and environmental control of gene expression in roots.
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Affiliation(s)
- Rui Wu
- Carnegie Institution for Science, Department of Plant Biology, Stanford, California 94305
- Temasek Lifesciences Laboratory, 117604, Singapore, Singapore
- National University of Singapore, Department of Biological Sciences, 117543, Singapore, Singapore
| | - Lina Duan
- Carnegie Institution for Science, Department of Plant Biology, Stanford, California 94305
| | - José L Pruneda-Paz
- University of California San Diego, Section of Cell and Developmental Biology, La Jolla, California 92093
| | - Dong-Ha Oh
- Louisiana State University, Department of Biological Sciences, Baton Rouge, Louisiana 70803
| | - Michael Pound
- University of Nottingham, School of Computer Science, Jubilee Campus, Nottingham, NG8 1BB, United Kingdom
| | - Steve Kay
- University of Southern California, The Keck School of Medicine, Los Angeles, California 90089
| | - José R Dinneny
- Carnegie Institution for Science, Department of Plant Biology, Stanford, California 94305
- Temasek Lifesciences Laboratory, 117604, Singapore, Singapore
- National University of Singapore, Department of Biological Sciences, 117543, Singapore, Singapore
- Stanford University, Department of Biology, Stanford, California 94305
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14
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Ma X, Zhang Y, Turečková V, Xue GP, Fernie AR, Mueller-Roeber B, Balazadeh S. The NAC Transcription Factor SlNAP2 Regulates Leaf Senescence and Fruit Yield in Tomato. Plant Physiol 2018; 177:1286-1302. [PMID: 29760199 PMCID: PMC6052983 DOI: 10.1104/pp.18.00292] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 05/02/2018] [Indexed: 05/18/2023]
Abstract
Leaf senescence is an essential physiological process in plants that supports the recycling of nitrogen and other nutrients to support the growth of developing organs, including young leaves, seeds, and fruits. Thus, the regulation of senescence is crucial for evolutionary success in wild populations and for increasing yield in crops. Here, we describe the influence of a NAC transcription factor, SlNAP2 (Solanum lycopersicum NAC-like, activated by Apetala3/Pistillata), that controls both leaf senescence and fruit yield in tomato (S. lycopersicum). SlNAP2 expression increases during age-dependent and dark-induced leaf senescence. We demonstrate that SlNAP2 activates SlSAG113 (S. lycopersicum SENESCENCE-ASSOCIATED GENE113), a homolog of Arabidopsis (Arabidopsis thaliana) SAG113, chlorophyll degradation genes such as SlSGR1 (S. lycopersicum senescence-inducible chloroplast stay-green protein 1) and SlPAO (S. lycopersicum pheide a oxygenase), and other downstream targets by directly binding to their promoters, thereby promoting leaf senescence. Furthermore, SlNAP2 directly controls the expression of genes important for abscisic acid (ABA) biosynthesis, S. lycopersicum 9-cis-epoxycarotenoid dioxygenase 1 (SlNCED1); transport, S. lycopersicum ABC transporter G family member 40 (SlABCG40); and degradation, S. lycopersicum ABA 8'-hydroxylase (SlCYP707A2), indicating that SlNAP2 has a complex role in establishing ABA homeostasis during leaf senescence. Inhibiting SlNAP2 expression in transgenic tomato plants impedes leaf senescence but enhances fruit yield and sugar content likely due to prolonged leaf photosynthesis in aging tomato plants. Our data indicate that SlNAP2 has a central role in controlling leaf senescence and fruit yield in tomato.
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Affiliation(s)
- Xuemin Ma
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- University of Potsdam, Institute of Biochemistry and Biology, 14476 Potsdam-Golm, Germany
| | - Youjun Zhang
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Veronika Turečková
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Palacký University and Institute of Experimental Botany, Czech Academy of Sciences, 78371 Olomouc, Czech Republic
| | | | - Alisdair R Fernie
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Bernd Mueller-Roeber
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
- University of Potsdam, Institute of Biochemistry and Biology, 14476 Potsdam-Golm, Germany
- Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
| | - Salma Balazadeh
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
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15
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Boba A, Kostyn K, Preisner M, Wojtasik W, Szopa J, Kulma A. Expression of heterologous lycopene β-cyclase gene in flax can cause silencing of its endogenous counterpart by changes in gene-body methylation and in ABA homeostasis mechanism. Plant Physiol Biochem 2018; 127:143-151. [PMID: 29579641 DOI: 10.1016/j.plaphy.2018.03.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 01/09/2018] [Revised: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 05/28/2023]
Abstract
Previously we described flax plants with expression of Arabidopsis lycopene β-cyclase (lcb) gene in which decreased expression of the endogenous lcb and increased resistance to fungal pathogen was observed. We suggested that co-suppression was responsible for the change. In this study we investigated the molecular basis of the observed effect in detail. We found that methylation changes in the Lulcb gene body might be responsible for repression of the gene. Treatment with azacitidine (DNA methylation inhibitor) confirmed the results. Moreover, we studied how the manipulation of carotenoid biosynthesis pathway increased ABA level in these plants. We suggest that elevated ABA levels may be responsible for the increased resistance of the flax plants to pathogen infection through activation of chitinase (PR gene).
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Affiliation(s)
- Aleksandra Boba
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Kamil Kostyn
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland; Department of Genetics, Plant Breeding and Seed Production, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Plant Sciences, Plac Grunwaldzki 24A, 53-363 Wroclaw, Poland.
| | - Marta Preisner
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland; Department of Genetics, Plant Breeding and Seed Production, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Plant Sciences, Plac Grunwaldzki 24A, 53-363 Wroclaw, Poland.
| | - Wioleta Wojtasik
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
| | - Jan Szopa
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland; Department of Genetics, Plant Breeding and Seed Production, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Plant Sciences, Plac Grunwaldzki 24A, 53-363 Wroclaw, Poland.
| | - Anna Kulma
- Faculty of Biotechnology, University of Wroclaw, Przybyszewskiego 63/77, 51-148 Wroclaw, Poland.
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16
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Ullah A, Sun H, Yang X, Zhang X. A novel cotton WRKY gene, GhWRKY6-like, improves salt tolerance by activating the ABA signaling pathway and scavenging of reactive oxygen species. Physiol Plant 2018; 162:439-454. [PMID: 29027659 DOI: 10.1111/ppl.12651] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/03/2017] [Accepted: 10/04/2017] [Indexed: 05/17/2023]
Abstract
WRKY transcription factors are transcriptional regulators of signaling pathways involved in biotic and abiotic stress responses. In this study, we report that ectopic expression of the GhWRKY6-like gene significantly improved salt tolerance in Arabidopsis thaliana while silencing the GhWRKY6-like increase the sensitivity to abiotic stresses in cotton. GhWRKY6-like was localized to the nucleus. Expression of GhWRKY6-like was remarkably induced by salt, polyethylene glycol (PEG) and abscisic acid (ABA) treatments. For further characterization, the GhWRKY6-like gene was cloned and transformed into Arabidopsis. Our findings showed that the germination rate and root length were significantly improved in plants overexpressing GhWRKY6-like vs wild type (WT) under salt, mannitol and ABA treatments. Additionally, the overexpressing lines showed greater salt tolerance than WT plants in soil. In addition, overexpressing plants accumulated less H2 O2 and malondialdehyde (MDA), while higher proline content, superoxide dismutase (SOD) and peroxidase (POD) activities were detected under salt and osmotic stresses. In contrast, virus-induced gene silencing (VIGS) of GhWRKY6-like in cotton showed enhanced sensitivity compared to WT plants during salt and drought stresses. Additionally, expression analysis of stress-responsive genes in GhWRKY6-like Arabidopsis revealed that there was increased expression of genes involved in the ABA signaling pathway (AtABF4, AtABI5 and AtMYC2) and osmotic stress (AtSOS2, AtRD29a and AtRD29b). Our results revealed that GhWRKY6-like enhanced salt tolerance in Arabidopsis by scavenging reactive oxygen species and regulating the ABA signaling pathway. We suggest that overexpression of the GhWRKY6-like gene in cotton will enhance tolerance against salt, drought and osmotic stresses.
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Affiliation(s)
- Abid Ullah
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, P. R. China
| | - Heng Sun
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, P. R. China
| | - Xiyan Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, P. R. China
| | - Xianlong Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, P. R. China
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17
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Jakubowicz M, Nowak W, Gałgański Ł, Babula-Skowrońska D. Expression profiling of genes encoding ABA route components in response to dehydration or various light conditions in poplar buds and leaves. J Plant Physiol 2018; 223:84-95. [PMID: 29554558 DOI: 10.1016/j.jplph.2018.01.011] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 06/08/2023]
Abstract
In this report, the members of PP2C, SnRK2a and Rboh oxidase families from Arabidopsis and poplar were studied in silico, and the expression profiles of the some of them were specified in Populus tremula buds and adult leaves. In poplars, the counterparts of ABI1- and ABI2-like protein phosphatases are lacking, but poplar genomes encode three HAB-like proteins denoted in this work as HAB1, HAB3a and HAB3b, and the counterparts of the two latter ones are absent in Arabidopsis. Nonetheless, they may be present in other species. In poplars, SnRK2 subclass III includes two SnRK2.6-like protein kinases denoted by us as SnRK2.6a and SnRK2.6b, and only one SnRK2.2 corresponding to SnRK2.2 and SnRK2.3 ones from Arabidopsis. In contrast to Arabidopsis, the poplar Rboh family involves two RbohD- and RbohF-like proteins denoted here as RbohD1 and RbohD2, and RbohF1 and RbohF2, respectively. The expressions of genes encoding the above components of the ABA route were studied in Populus tremula dehydrated buds and adult leaves not subjected to stress but exposed to natural daylight or to darkness, and to inhibition of ethylene biosynthesis or signaling route by cobalt or silver ions, respectively. In leaves, the light conditions seemed to be the most pronounced factor, from among the studied stimuli, controlling the expression Ptre-HAB3a, Ptre-HAB1, Ptre-SnRK2.6a and Ptre-RbohF2 genes, their expression was upregulated in darkness. This observation implies that these genes may be important for dark-induced stomatal closure regulation. Ethylene negatively affected the expression of three studied Rboh genes and Ptre-HAB1one but only at daylight, whereas its positive effect on the of Ptre-HAB3a was shown in the dark exposed leaves. In buds, three studied Rboh genes took part in the early response to dehydration, however their participation involved the visibly highest level of the Ptre-RbohD1 transcripts, followed by Ptre-RbohF2 and the lowest one of Ptre-RbohF1. Nonetheless, the further stress-induced superoxide anion generation seemed to depend on the enhanced expression of the Ptre-RbohD1 and Ptre-RbohF2 genes only, still with a significantly higher level of the Ptre-RbohD1 one. Ptre-RbohD2 transcripts were found neither in leaves nor in buds. The expression of the other genes discussed in the present work was either slightly upregulated at moderate stress or did not significantly change in response to dehydration. The protein kinase activity of overexpressed Ptre-SnRK2.6a and Ptre-SnRK2.6b was confirmed in in vitro protein kinase assay and compared to that of SnRK2.6/OST1 one from Arabidopsis.
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Affiliation(s)
- Małgorzata Jakubowicz
- Department of Genome Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland.
| | - Witold Nowak
- Molecular Biology Techniques Laboratory, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland
| | - Łukasz Gałgański
- Department of Genome Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznań, Poland; Department of Molecular Biomedicine, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland
| | - Danuta Babula-Skowrońska
- Department of Environmental Stress Biology, Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland
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18
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Luang S, Sornaraj P, Bazanova N, Jia W, Eini O, Hussain SS, Kovalchuk N, Agarwal PK, Hrmova M, Lopato S. The wheat TabZIP2 transcription factor is activated by the nutrient starvation-responsive SnRK3/CIPK protein kinase. Plant Mol Biol 2018; 96:543-561. [PMID: 29564697 DOI: 10.1007/s11103-018-0713-1] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 02/23/2018] [Indexed: 05/09/2023]
Abstract
The understanding of roles of bZIP factors in biological processes during plant development and under abiotic stresses requires the detailed mechanistic knowledge of behaviour of TFs. Basic leucine zipper (bZIP) transcription factors (TFs) play key roles in the regulation of grain development and plant responses to abiotic stresses. We investigated the role and molecular mechanisms of function of the TabZIP2 gene isolated from drought-stressed wheat plants. Molecular characterisation of TabZIP2 and derived protein included analyses of gene expression and its target promoter, and the influence of interacting partners on the target promoter activation. Two interacting partners of TabZIP2, the 14-3-3 protein, TaWIN1 and the bZIP transcription factor TaABI5L, were identified in a Y2H screen. We established that under elevated ABA levels the activity of TabZIP2 was negatively regulated by the TaWIN1 protein and positively regulated by the SnRK3/CIPK protein kinase WPK4, reported previously to be responsive to nutrient starvation. The physical interaction between the TaWIN1 and the WPK4 was detected. We also compared the influence of homo- and hetero-dimerisation of TabZIP2 and TaABI5L on DNA binding. TabZIP2 gene functional analyses were performed using drought-inducible overexpression of TabZIP2 in transgenic wheat. Transgenic plants grown under moderate drought during flowering, were smaller than control plants, and had fewer spikes and seeds per plant. However, a single seed weight was increased compared to single seed weights of control plants in three of four evaluated transgenic lines. The observed phenotypes of transgenic plants and the regulation of TabZIP2 activity by nutrient starvation-responsive WPK4, suggest that the TabZIP2 could be the part of a signalling pathway, which controls the rearrangement of carbohydrate and nutrient flows in plant organs in response to drought.
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Affiliation(s)
- Sukanya Luang
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Pradeep Sornaraj
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Natalia Bazanova
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Commonwealth Scientific and Industrial Research Organisation, Glen Osmond, SA, 5064, Australia
| | - Wei Jia
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Omid Eini
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Department of Plant Protection, School of Agriculture, University of Zanjan, Zanjan, Iran
| | - Syed Sarfraz Hussain
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
- Forman Christian College, Lahore, 54600, Pakistan
| | - Nataliya Kovalchuk
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Pradeep K Agarwal
- CSIR-Central Salt and Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar, India
| | - Maria Hrmova
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia.
| | - Sergiy Lopato
- School of Agriculture, Food and Wine, University of Adelaide, Glen Osmond, SA, 5064, Australia
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19
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Laloum T, Martín G, Duque P. Alternative Splicing Control of Abiotic Stress Responses. Trends Plant Sci 2018; 23:140-150. [PMID: 29074233 DOI: 10.1016/j.tplants.2017.09.019] [Citation(s) in RCA: 265] [Impact Index Per Article: 44.2] [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: 07/23/2017] [Revised: 09/25/2017] [Accepted: 09/26/2017] [Indexed: 05/20/2023]
Abstract
Alternative splicing, which generates multiple transcripts from the same gene, is an important modulator of gene expression that can increase proteome diversity and regulate mRNA levels. In plants, this post-transcriptional mechanism is markedly induced in response to environmental stress, and recent studies have identified alternative splicing events that allow rapid adjustment of the abundance and function of key stress-response components. In agreement, plant mutants defective in splicing factors are severely impaired in their response to abiotic stress. Notably, mounting evidence indicates that alternative splicing regulates stress responses largely by targeting the abscisic acid (ABA) pathway. We review here current understanding of post-transcriptional control of plant stress tolerance via alternative splicing and discuss research challenges for the near future.
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Affiliation(s)
- Tom Laloum
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
| | - Guiomar Martín
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal
| | - Paula Duque
- Instituto Gulbenkian de Ciência, 2780-156 Oeiras, Portugal.
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20
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Jeon E, Young Kang N, Cho C, Joon Seo P, Chung Suh M, Kim J. LBD14/ASL17 Positively Regulates Lateral Root Formation and is Involved in ABA Response for Root Architecture in Arabidopsis. Plant Cell Physiol 2017; 58:2190-2201. [PMID: 29040694 DOI: 10.1093/pcp/pcx153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 01/19/2017] [Accepted: 10/03/2017] [Indexed: 05/21/2023]
Abstract
The LATERAL ORGAN BOUNDARIES (LOB) DOMAIN/ASYMMETRIC LEAVES2-LIKE (LBD/ASL) gene family members play key roles in diverse aspects of plant development. Previous studies have shown that LBD16, 18, 29 and 33 are critical for integrating the plant hormone auxin to control lateral root development in Arabidopsis thaliana. In the present study, we show that LBD14 is expressed exclusively in the root where it promotes lateral root (LR) emergence. Repression of LBD14 expression by ABA correlates with the inhibitory effects of ABA on LR emergence. Transient gene expression assays with Arabidopsis protoplasts demonstrated that LBD14 is a nuclear-localized transcriptional activator. The knock-down of LBD14 expression by RNA interference (RNAi) resulted in reduced LR formation by delaying both LR primordium development and LR emergence, whereas overexpression of LBD14 in Arabidopsis enhances LR formation. We show that ABA (but not other plant hormones such as auxin, brassinosteroids and cytokinin) specifically down-regulated β-glucuronidase (GUS) expression under the control of the LBD14 promoter in transgenic Arabidopsis during LR development from initiation to emergence and endogenous LBD14 transcript levels in the root. Moreover, RNAi of LBD14 enhanced the LR suppression in response to ABA, whereas LBD14 overexpression did not alter the ABA-mediated suppression of LR formation. Taken together, these results suggest that LBD14 promoting LR formation is one of the critical factors regulated by ABA to inhibit LR growth, contributing to the regulation of the Arabidopsis root system architecture in response to ABA.
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Affiliation(s)
- Eunkyeong Jeon
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Korea
| | - Na Young Kang
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Korea
| | - Chuloh Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Korea
| | - Pil Joon Seo
- Department of Biological Sciences, Sungkyunkwan University, Suwon, Korea
| | - Mi Chung Suh
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Korea
| | - Jungmook Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Korea
- Kumho Life Science Laboratory, Chonnam National University, Gwangju 500-757, Korea
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21
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Xu D, Cao H, Fang W, Pan J, Chen J, Zhang J, Shen W. Linking hydrogen-enhanced rice aluminum tolerance with the reestablishment of GA/ABA balance and miRNA-modulated gene expression: A case study on germination. Ecotoxicol Environ Saf 2017; 145:303-312. [PMID: 28756251 DOI: 10.1016/j.ecoenv.2017.07.055] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 03/25/2017] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 06/07/2023]
Abstract
Although previous results showed that exogenous hydrogen (H2) alleviated aluminum (Al) toxicity, the detailed mechanism remains unclear. Here, we reported that the exposure of germinating rice seeds to Al triggered H2 production, followed by a decrease of GA/ABA ratio and seed germination inhibition. Compared to inert gas (argon), H2 pretreatment not only strengthened H2 production and alleviated Al-induced germination inhibition, but also partially reestablished the balance between GA and ABA. By contrast, a GA biosynthesis inhibitor paclobutrazol (PAC) could block the H2-alleviated germination inhibition. The expression of GA biosynthesis genes (GA20ox1 and GA20ox2) and ABA catabolism genes (ABA8ox1 and ABA8ox2), was also induced by H2. Above results indicated that GA/ABA might be partially involved in H2 responses. Subsequent results revealed that compared with Al alone, transcripts of miR398a and miR159a were decreased by H2, and expression levels of their target genes OsSOD2 and OsGAMYB were up-regulated. Whereas, miR528 and miR160a transcripts were increased differentially, and contrasting tendencies were observed in the changes of their target genes (OsAO and OsARF10). The transcripts of Al-tolerant gene OsSTAR1/OsSTAR2 and OsFRDL4 were up-regulated. Above results were consistent with the anti-oxidant defense, decreased Al accumulation, and enhanced citrate efflux. Together, our results provided insight into the mechanism underlying H2-triggered Al tolerance in plants.
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Affiliation(s)
- Daokun Xu
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Hong Cao
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei Fang
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jincheng Pan
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun Chen
- Yanggu (Wuhan) Environmental Sci-Tech Corp., Wuhan 430200, China
| | - Jiaofei Zhang
- Wuhan Shizhen Water Structure Research Institute Co., Ltd., Wuhan 430200, China
| | - Wenbiao Shen
- College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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22
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Shuai H, Meng Y, Luo X, Chen F, Zhou W, Dai Y, Qi Y, Du J, Yang F, Liu J, Yang W, Shu K. Exogenous auxin represses soybean seed germination through decreasing the gibberellin/abscisic acid (GA/ABA) ratio. Sci Rep 2017; 7:12620. [PMID: 28974733 PMCID: PMC5626727 DOI: 10.1038/s41598-017-13093-w] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 09/19/2017] [Indexed: 11/09/2022] Open
Abstract
Auxin is an important phytohormone which mediates diverse development processes in plants. Published research has demonstrated that auxin induces seed dormancy. However, the precise mechanisms underlying the effect of auxin on seed germination need further investigation, especially the relationship between auxins and both abscisic acid (ABA) and gibberellins (GAs), the latter two phytohormones being the key regulators of seed germination. Here we report that exogenous auxin treatment represses soybean seed germination by enhancing ABA biosynthesis, while impairing GA biogenesis, and finally decreasing GA1/ABA and GA4/ABA ratios. Microscope observation showed that auxin treatment delayed rupture of the soybean seed coat and radicle protrusion. qPCR assay revealed that transcription of the genes involved in ABA biosynthetic pathway was up-regulated by application of auxin, while expression of genes involved in GA biosynthetic pathway was down-regulated. Accordingly, further phytohormone quantification shows that auxin significantly increased ABA content, whereas the active GA1 and GA4 levels were decreased, resulting insignificant decreases in the ratiosGA1/ABA and GA4/ABA.Consistent with this, ABA biosynthesis inhibitor fluridone reversed the delayed-germination phenotype associated with auxin treatment, while paclobutrazol, a GA biosynthesis inhibitor, inhibited soybean seed germination. Altogether, exogenous auxin represses soybean seed germination by mediating ABA and GA biosynthesis.
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Affiliation(s)
- Haiwei Shuai
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yongjie Meng
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiaofeng Luo
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Feng Chen
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wenguan Zhou
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yujia Dai
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Ying Qi
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Junbo Du
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Feng Yang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jiang Liu
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wenyu Yang
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Kai Shu
- Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Sichuan Engineering Research Center for Crop Strip Intercropping System, Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu, 611130, China.
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23
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Tuan PA, Bai S, Saito T, Ito A, Moriguchi T. Dormancy-Associated MADS-Box (DAM) and the Abscisic Acid Pathway Regulate Pear Endodormancy Through a Feedback Mechanism. Plant Cell Physiol 2017; 58:1378-1390. [PMID: 28586469 DOI: 10.1093/pcp/pcx074] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [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: 01/16/2017] [Accepted: 05/10/2017] [Indexed: 05/20/2023]
Abstract
In the pear 'Kosui' (Pyrus pyrifolia Nakai), the dormancy-associated MADS-box (PpDAM1 = PpMADS13-1) gene has been reported to play an essential role in bud endodormancy. Here, we found that PpDAM1 up-regulated expression of 9-cis-epoxycarotenoid dioxygenase (PpNCED3), which is a rate-limiting gene for ABA biosynthesis. Transient assays with a dual luciferase reporter system (LUC assay) and electrophoretic mobility shift assay (EMSA) showed that PpDAM1 activated PpNCED3 expression by binding to the CArG motif in the PpNCED3 promoter. PpNCED3 expression was increased toward endodormancy release in lateral flower buds of 'Kosui', which is consistent with the induced levels of ABA, its catabolism (ABA 8'-hydroxylase) and signaling genes (type 2C protein phosphatase genes and SNF1-related protein kinase 2 genes). In addition, we found that an ABA response element (ABRE)-binding transcription factor, PpAREB1, exhibiting high expression concomitant with endodormancy release, bound to three ABRE motifs in the promoter region of PpDAM1 and negatively regulated its activity. Taken together, our results suggested a feedback regulation between PpDAM1 and the ABA metabolism and signaling pathway during endodormancy of pear. This first evidence of an interaction between a DAM and ABA biosynthesis in vitro will provide further insights into bud endodormancy regulatory mechanisms of deciduous trees including pear.
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Affiliation(s)
- Pham Anh Tuan
- Institute of Fruit Tree and Tea Science, NARO, Tsukuba, Ibaraki 305-8605, Japan
| | - Songling Bai
- Institute of Fruit Tree and Tea Science, NARO, Tsukuba, Ibaraki 305-8605, Japan
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Takanori Saito
- Institute of Fruit Tree and Tea Science, NARO, Tsukuba, Ibaraki 305-8605, Japan
- Graduate School of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan
| | - Akiko Ito
- Institute of Fruit Tree and Tea Science, NARO, Tsukuba, Ibaraki 305-8605, Japan
| | - Takaya Moriguchi
- Institute of Fruit Tree and Tea Science, NARO, Tsukuba, Ibaraki 305-8605, Japan
- Institute of Fruit Tree and Tea Science, NARO, Okitsu-Nakacho Shimizu, Shizuoka 424-0292, Japan
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24
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Wang GQ, Hao SS, Gao B, Chen MX, Liu YG, Yang JC, Ye NH, Zhang JH. Regulation of Gene Expression in the Remobilization of Carbon Reserves in Rice Stems During Grain Filling. Plant Cell Physiol 2017; 58:1391-1404. [PMID: 28575477 DOI: 10.1093/pcp/pcx072] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 12/23/2016] [Accepted: 05/09/2017] [Indexed: 05/15/2023]
Abstract
Carbon reserves in rice straw (stem and sheath) before flowering contribute to a significant portion of grain filling. However, the molecular mechanism of carbon reserve remobilization from straw to grains remains unclear. In this study, super rice LYP9 and conventional rice 9311 showed different carbon reserve remobilization behaviors. The transcriptomic profiles of straws of LYP9 and 9311 were analyzed at three stages of grain filling. Among the differentially expressed genes (DGs), 5,733 genes were uniquely up- or down-regulated at 30 days after anthesis (DAA) between LYP9 and 9311 in comparison with 681 at 10 DAA and 495 at 20 DAA, suggesting that the gene expression profile of LYP9 was very different from that of 9311 at the late stage of grain filling. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis and Gene Ontology (GO) classification of DGs both showed that the carbohydrate catabolic pathway, plant hormone signal transduction and photosynthesis pathway were enriched in DGs, suggesting their roles in carbon reserve remobilization, which explains to a certain extent the difference in non-structural carbohydrate content, photosynthesis and ABA content between the two cultivars during grain filling. Further comparative analysis and confirmation by quantitative real-time PCR and enzyme assays suggest that genes involved in trehalose synthesis (trehalose-phosphate phosphatase and trehalose 6-phosphate synthase/phosphatase), starch degradation (β-amylase) and sucrose synthesis (sucrose-phosphate synthase and sucrose synthase) were important for carbon reserve remobilization, whereas ABA content was determined by the counteraction of NCED1 and ABA8ox1 genes. The higher expression level of all these genes and ABA content in 9311 resulted in better efficiency of carbon reserve remobilization in 9311 than in LYP9.
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Affiliation(s)
- Guan-Qun Wang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Hunan Agricultural University, Changsha, 410128, China
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Shuai-Shuai Hao
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, Jiangsu, China
| | - Bei Gao
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Mo-Xian Chen
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ying-Gao Liu
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Taian, Shandong, China
| | - Jian-Chang Yang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou, Jiangsu, China
| | - Neng-Hui Ye
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Hunan Agricultural University, Changsha, 410128, China
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Jian-Hua Zhang
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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25
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Buzas DM. Capturing Environmental Plant Memories in DNA, with a Little Help from Chromatin. Plant Cell Physiol 2017; 58:1302-1312. [PMID: 28961992 DOI: 10.1093/pcp/pcx092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 04/04/2017] [Accepted: 06/28/2017] [Indexed: 05/11/2023]
Abstract
Plants are eukaryotes living mostly immotile in harsh environments. On occasion, it is beneficial for their survival to maintain a transcriptional response to an environmental stress longer than the stress lasts (transcriptional memory) and even to reiterate such a response more quickly or more strongly when the same stress is re-encountered (priming memory). In eukaryotes, transcription takes place in the context of chromatin, the packaging material of DNA. Chromatin regulation is often invoked when it comes to environmental transcriptional and priming memory in plants, but rarely chromatin-based regulation can be accurately assigned to a given aspect of transcription in vivo. The conserved eukaryotic chromatin-modifying system Polycomb/Trithorax can support both long-term stability and flexibility of gene expression in Drosophila. The main principles of Polycomb/Trithorax regulation will be outlined and illustrated with the best-studied case of environmental memory from Arabidopsis. Despite being complex, the Polycomb/Trithorax system relies on experimentally tractable elements in the form of DNA, termed Polycomb/Trithorax Responsive Elements. PREs/TREs are essentially memory DNA elements. Here, relevant information to identify PRE/TRE-like elements in plants is highlighted. Examples of priming memory in plants are discussed in relation to the first two reported putative memory DNA elements. Arguably, similar cases from plants can be conducive in dissecting the contribution of DNA-based from chromatin-based regulation of transcription, when two types of DNA elements are defined: those representing binding sites for the transcription factors determining the environmental response and those controlling memory by regulating chromatin modification dynamics, ultimately maintaining the corresponding transcriptional state.
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Affiliation(s)
- Diana Mihaela Buzas
- Life and Environmental Sciences and Gene Research Centre, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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26
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Le Hir R, Castelain M, Chakraborti D, Moritz T, Dinant S, Bellini C. AtbHLH68 transcription factor contributes to the regulation of ABA homeostasis and drought stress tolerance in Arabidopsis thaliana. Physiol Plant 2017; 160:312-327. [PMID: 28369972 DOI: 10.1111/ppl.12549] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 01/18/2017] [Accepted: 01/20/2017] [Indexed: 05/22/2023]
Abstract
Basic helix-loop-helix (bHLH) transcription factors are involved in a wide range of developmental processes and in response to biotic and abiotic stresses. They represent one of the biggest families of transcription factors but only few of them have been functionally characterized. Here we report the characterization of AtbHLH68 and show that, although the knock out mutant did not have an obvious development phenotype, it was slightly more sensitive to drought stress than the Col-0, and AtbHLH68 overexpressing lines displayed defects in lateral root (LR) formation and a significant increased tolerance to drought stress, likely related to an enhanced sensitivity to abscisic acid (ABA) and/or increased ABA content. AtbHLH68 was expressed in the vascular system of Arabidopsis and its expression was modulated by exogenously applied ABA in an organ-specific manner. We showed that the expression of genes involved in ABA metabolism [AtAAO3 (AtALDEHYDE OXIDASE 3) and AtCYP707A3 (AtABSCISIC ACID 8'HYDROXYLASE 3)], in ABA-related response to drought-stress (AtMYC2, AtbHLH122 and AtRD29A) or during LRs development (AtMYC2 and AtABI3) was de-regulated in the overexpressing lines. We propose that AtbHLH68 has a function in the regulation of LR elongation, and in the response to drought stress, likely through an ABA-dependent pathway by regulating directly or indirectly components of ABA signaling and/or metabolism.
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Affiliation(s)
- Rozenn Le Hir
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, 78000, France
| | - Mathieu Castelain
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, 90187, Sweden
| | - Dipankar Chakraborti
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, 90187, Sweden
| | - Thomas Moritz
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, 90187, Sweden
| | - Sylvie Dinant
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, 78000, France
| | - Catherine Bellini
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, Versailles, 78000, France
- Umeå Plant Science Centre, Department of Plant Physiology, Umeå University, Umeå, 90183, Sweden
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27
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Gupta A, Hisano H, Hojo Y, Matsuura T, Ikeda Y, Mori IC, Senthil-Kumar M. Global profiling of phytohormone dynamics during combined drought and pathogen stress in Arabidopsis thaliana reveals ABA and JA as major regulators. Sci Rep 2017; 7:4017. [PMID: 28638069 PMCID: PMC5479852 DOI: 10.1038/s41598-017-03907-2] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 05/05/2017] [Indexed: 12/20/2022] Open
Abstract
Global transcriptome studies demonstrated the existence of unique plant responses under combined stress which are otherwise not seen during individual stresses. In order to combat combined stress plants use signaling pathways and 'cross talk' mediated by hormones involved in stress and growth related processes. However, interactions among hormones' pathways in combined stressed plants are not yet known. Here we studied dynamics of different hormones under individual and combined drought and pathogen infection in Arabidopsis thaliana by liquid chromatography-mass spectrometry (LC-MS) based profiling. Our results revealed abscisic acid (ABA) and salicylic acid (SA) as key regulators under individual drought and pathogen stress respectively. Under combined drought and host pathogen stress (DH) we observed non-induced levels of ABA with an upsurge in SA and jasmonic acid (JA) concentrations, underscoring their role in basal tolerance against host pathogen. Under a non-host pathogen interaction with drought (DNH) stressed plants, ABA, SA and JA profiles were similar to those under DH or non-host pathogen alone. We propose that plants use SA/JA dependent signaling during DH stress which antagonize ABA biosynthesis and signaling pathways during early stage of stress. The study provides insights into hormone modulation at different time points during combined stress.
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Affiliation(s)
- Aarti Gupta
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, JNU campus, New Delhi, 110067, India
| | - Hiroshi Hisano
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Yuko Hojo
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Takakazu Matsuura
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Yoko Ikeda
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Izumi C Mori
- Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan
| | - Muthappa Senthil-Kumar
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, JNU campus, New Delhi, 110067, India.
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28
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Wang Z, Han Q, Zi Q, Lv S, Qiu D, Zeng H. Enhanced disease resistance and drought tolerance in transgenic rice plants overexpressing protein elicitors from Magnaporthe oryzae. PLoS One 2017; 12:e0175734. [PMID: 28419172 PMCID: PMC5395183 DOI: 10.1371/journal.pone.0175734] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 03/30/2017] [Indexed: 01/12/2023] Open
Abstract
Exogenous application of the protein elicitors MoHrip1 and MoHrip2, which were isolated from the pathogenic fungus Magnaporthe oryzae (M. oryzae), was previously shown to induce a hypersensitive response in tobacco and to enhance resistance to rice blast. In this work, we successfully transformed rice with the mohrip1 and mohrip2 genes separately. The MoHrip1 and MoHrip2 transgenic rice plants displayed higher resistance to rice blast and stronger tolerance to drought stress than wild-type (WT) rice and the vector-control pCXUN rice. The expression of salicylic acid (SA)- and abscisic acid (ABA)-related genes was also increased, suggesting that these two elicitors may trigger SA signaling to protect the rice from damage during pathogen infection and regulate the ABA content to increase drought tolerance in transgenic rice. Trypan blue staining indicated that expressing MoHrip1 and MoHrip2 in rice plants inhibited hyphal growth of the rice blast fungus. Relative water content (RWC), water usage efficiency (WUE) and water loss rate (WLR) were measured to confirm the high capacity for water retention in transgenic rice. The MoHrip1 and MoHrip2 transgenic rice also exhibited enhanced agronomic traits such as increased plant height and tiller number.
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Affiliation(s)
- Zhenzhen Wang
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qiang Han
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qian Zi
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shun Lv
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dewen Qiu
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hongmei Zeng
- The State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- * E-mail:
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29
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Pang J, Turner NC, Khan T, Du YL, Xiong JL, Colmer TD, Devilla R, Stefanova K, Siddique KHM. Response of chickpea (Cicer arietinum L.) to terminal drought: leaf stomatal conductance, pod abscisic acid concentration, and seed set. J Exp Bot 2017; 68:1973-1985. [PMID: 27099375 PMCID: PMC5429003 DOI: 10.1093/jxb/erw153] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 05/22/2023]
Abstract
Flower and pod production and seed set of chickpea (Cicer arietinum L.) are sensitive to drought stress. A 2-fold range in seed yield was found among a large number of chickpea genotypes grown at three dryland field sites in south-western Australia. Leaf water potential, photosynthetic characteristics, and reproductive development of two chickpea genotypes with contrasting yields in the field were compared when subjected to terminal drought in 106kg containers of soil in a glasshouse. The terminal drought imposed from early podding reduced biomass, reproductive growth, harvest index, and seed yield of both genotypes. Terminal drought at least doubled the percentage of flower abortion, pod abscission, and number of empty pods. Pollen viability and germination decreased when the fraction of transpirable soil water (FTSW) decreased below 0.18 (82% of the plant-available soil water had been transpired); however, at least one pollen tube in each flower reached the ovary. The young pods which developed from flowers produced when the FTSW was 0.50 had viable embryos, but contained higher abscisic acid (ABA) concentrations than those of the well-watered plants; all pods ultimately aborted in the drought treatment. Cessation of seed set at the same soil water content at which stomata began to close and ABA increased strongly suggested a role for ABA signalling in the failure to set seed either directly through abscission of developing pods or seeds or indirectly through the reduction of photosynthesis and assimilate supply to the seeds.
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Affiliation(s)
- Jiayin Pang
- School of Plant Biology, The University of Western Australia, M084, LB 5005 Perth, WA 6001, Australia
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
| | - Neil C Turner
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
| | - Tanveer Khan
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
| | - Yan-Lei Du
- State Key Laboratory of Grassland Agroecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Jun-Lan Xiong
- State Key Laboratory of Grassland Agroecosystems, Institute of Arid Agroecology, School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Timothy D Colmer
- School of Plant Biology, The University of Western Australia, M084, LB 5005 Perth, WA 6001, Australia
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
| | - Rosangela Devilla
- CSIRO Agriculture, Black Mountain Laboratories, Canberra, ACT 2601, Australia
| | - Katia Stefanova
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture, The University of Western Australia, M082, LB 5005 Perth, WA 6001, Australia
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Arbona V, Zandalinas SI, Manzi M, González-Guzmán M, Rodriguez PL, Gómez-Cadenas A. Depletion of abscisic acid levels in roots of flooded Carrizo citrange (Poncirus trifoliata L. Raf. × Citrus sinensis L. Osb.) plants is a stress-specific response associated to the differential expression of PYR/PYL/RCAR receptors. Plant Mol Biol 2017; 93:623-640. [PMID: 28160166 DOI: 10.1007/s11103-017-0587-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 06/13/2016] [Accepted: 01/23/2017] [Indexed: 05/25/2023]
Abstract
Soil flooding reduces root abscisic acid (ABA) levels in citrus, conversely to what happens under drought. Despite this reduction, microarray analyses suggested the existence of a residual ABA signaling in roots of flooded Carrizo citrange seedlings. The comparison of ABA metabolism and signaling in roots of flooded and water stressed plants of Carrizo citrange revealed that the hormone depletion was linked to the upregulation of CsAOG, involved in ABA glycosyl ester (ABAGE) synthesis, and to a moderate induction of catabolism (CsCYP707A, an ABA 8'-hydroxylase) and buildup of dehydrophaseic acid (DPA). Drought strongly induced both ABA biosynthesis and catabolism (CsNCED1, 9-cis-neoxanthin epoxycarotenoid dioxygenase 1, and CsCYP707A) rendering a significant hormone accumulation. In roots of flooded plants, restoration of control ABA levels after stress release was associated to the upregulation of CsBGLU18 (an ABA β-glycosidase) that cleaves ABAGE. Transcriptional profile of ABA receptor genes revealed a different induction in response to soil flooding (CsPYL5) or drought (CsPYL8). These two receptor genes along with CsPYL1 were cloned and expressed in a heterologous system. Recombinant CsPYL5 inhibited ΔNHAB1 activity in vitro at lower ABA concentrations than CsPYL8 or CsPYL1, suggesting its better performance under soil flooding conditions. Both stress conditions induced ABA-responsive genes CsABI5 and CsDREB2A similarly, suggesting the occurrence of ABA signaling in roots of flooded citrus seedlings. The impact of reduced ABA levels in flooded roots on CsPYL5 expression along with its higher hormone affinity reinforce the role of this ABA receptor under soil-flooding conditions and explain the expression of certain ABA-responsive genes.
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Affiliation(s)
- Vicent Arbona
- Ecofisiologia i Biotecnologia Department Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain.
| | - Sara I Zandalinas
- Ecofisiologia i Biotecnologia Department Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
| | - Matías Manzi
- Ecofisiologia i Biotecnologia Department Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
| | - Miguel González-Guzmán
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, 46022, Valencia, Spain
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas, CSIC, 28040, Madrid, Spain
| | - Pedro L Rodriguez
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, 46022, Valencia, Spain
| | - Aurelio Gómez-Cadenas
- Ecofisiologia i Biotecnologia Department Ciències Agràries i del Medi Natural, Universitat Jaume I, 12071, Castelló de la Plana, Spain
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Xu P, Cai W. Functional characterization of the BnNCED3 gene in Brassica napus. Plant Sci 2017; 256:16-24. [PMID: 28167029 DOI: 10.1016/j.plantsci.2016.11.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 07/05/2016] [Revised: 10/25/2016] [Accepted: 11/27/2016] [Indexed: 05/12/2023]
Abstract
Abscisic acid (ABA) has been implicated in plant adaptation to various environmental stresses and the regulation of seed dormancy, leaf senescence and organ abscission progression. The cleavage of cis-epoxycarotenoids by 9-cis-epoxycarotenoid dioxygenase (NCED) family proteins is a critical step in the regulation of abscisic acid (ABA) synthesis in plants. In the present study, the NCED family gene BnNCED3 was isolated from Brassica napus. BnNCED3 encodes a 592-amino acid protein with high amino acid sequence similarity to the Arabidopsis AtNCED3 protein. Expression pattern assays revealed that BnNCED3 is ubiquitously expressed at different levels in all the examined organs. Furthermore, the overexpression of BnNCED3 contributed to ABA accumulation and NO and ROS generation in transgenic Arabidopsis plants, thereby enhancing abiotic stress tolerance. These experiments also indicated the involvement of BnNCED3 in the control of plant development in transgenic Arabidopsis, such as the inhibition of seed germination, lateral root initiation, early phase changes and the enhancement of ABA-associated leaf senescence. Together, these results indicated that BnNCED3 is at least partly involved in both stress adaptation and plant development through the regulation of ABA biosynthesis.
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Affiliation(s)
- Peipei Xu
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China.
| | - Weiming Cai
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China.
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Wang J, Lv M, Islam F, Gill RA, Yang C, Ali B, Yan G, Zhou W. Salicylic acid mediates antioxidant defense system and ABA pathway related gene expression in Oryza sativa against quinclorac toxicity. Ecotoxicol Environ Saf 2016; 133:146-56. [PMID: 27448955 DOI: 10.1016/j.ecoenv.2016.07.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [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: 05/04/2016] [Revised: 06/28/2016] [Accepted: 07/04/2016] [Indexed: 05/10/2023]
Abstract
The auxin herbicide quinclorac is widely used for controlling weeds in transplanted and direct-seeded rice fields. However, its phytotoxic responses on rice are still unknown. Therefore, in the present investigation we studied the effects of different concentrations (0, 0.1 and 0.5g/L) of quinclorac herbicide on the physiological and biochemical changes of two rice cultivars (XS 134 and ZJ 88) and further analyzed the ameliorating role of salicylic acid (SA) on quinclorac toxicity in rice plants. The results revealed that exogenous application of SA significantly increased plant biomass and total chlorophyll contents in herbicide stressed plants. The lipid peroxidation and ROS (H2O2, O2(-.), (-)OH) production were significantly increased in roots and leaves of both rice cultivars under quinclorac stress, demonstrating an oxidative burst in rice plants. Whereas, application of SA significantly lowered ROS contents under quinclorac stress. Further, exogenous SA treatment significantly modulated antioxidant enzymes and enhanced GSH concentration in stress plants. Anatomical observations of leaf and root revealed that herbicide affected internal structures, while SA played a vital role in protection from toxic effects. Expression analysis of stress hormone ABA genes (OsABA8oxs, OsNCEDs) revealed that quinclorac application enhanced stress condition in cultivar ZJ 88, while SA treatment downregulated ABA genes more in cultivar XS 134, which correlated with the enhanced tolerance to quinclorac induced oxidative stress in this cultivar. The present study delineated that SA played a critical role under quinclorac stress in both rice cultivars by regulating antioxidant defense system, reducing ROS formation and preventing the degradation of internal cell organelles.
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Affiliation(s)
- Jian Wang
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
| | - Mengting Lv
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
| | - Faisal Islam
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
| | - Rafaqat A Gill
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
| | - Chong Yang
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
| | - Basharat Ali
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China; Institute of Crop Science and Resource Conservation (INRES), Abiotic Stress Tolerance in Crops, University of Bonn, 53115 Bonn, Germany
| | - Guijun Yan
- School of Plant Biology, Faculty of Science and The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
| | - Weijun Zhou
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China.
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Yu D, Li X, Zhao X, Du C, Chen J, Li C, Sun M, Wang L, Lin J, Tang D, Yu F, Liu X. RPN1a negatively regulates ABA signaling in Arabidopsis. Plant Physiol Biochem 2016; 108:279-285. [PMID: 27474935 DOI: 10.1016/j.plaphy.2016.06.012] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 06/01/2016] [Accepted: 06/11/2016] [Indexed: 06/06/2023]
Abstract
The 26S proteasome selectively regulates key abscisic acid (ABA) signaling proteins, but the physiological functions and mechanisms of RPN1a (a subunit of the 26S proteasome) in ABA signaling remain largely unknown. In this study, we found that the mRNA expression of RPN1a was suppressed by ABA treatment, and that RPN1a protein was expressed abundantly in guard cells. In the presence of ABA, rpn1a mutants showed rapid stomatal closure, low water loss, delayed germination, and inhibited root elongation. In addition, the transcripts of key ABA signaling genes, including ABI5, RD22, RD29A, and RD29B, were upregulated in rpn1a mutant plants in response to ABA. Furthermore, the ABI5 protein level was higher in rpn1a mutants subjected to ABA treatment. Yeast two-hybrid and bimolecular fluorescence complementation assays showed that RPN1a interacts with ABI1. Overall, these findings suggest that RPN1a negatively regulates ABA signaling in Arabidopsis.
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Affiliation(s)
- Dashi Yu
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Xiushan Li
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Xiaoying Zhao
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Changqing Du
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Jia Chen
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Chiyu Li
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Mengsi Sun
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Long Wang
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Jianzhong Lin
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Dongying Tang
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China
| | - Feng Yu
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China.
| | - Xuanming Liu
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha, 410082, China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China.
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Yan J, Zhao C, Zhou J, Yang Y, Wang P, Zhu X, Tang G, Bressan RA, Zhu JK. The miR165/166 Mediated Regulatory Module Plays Critical Roles in ABA Homeostasis and Response in Arabidopsis thaliana. PLoS Genet 2016; 12:e1006416. [PMID: 27812104 PMCID: PMC5094776 DOI: 10.1371/journal.pgen.1006416] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/10/2016] [Indexed: 11/19/2022] Open
Abstract
The function of miR165/166 in plant growth and development has been extensively studied, however, its roles in abiotic stress responses remain largely unknown. Here, we report that reduction in the expression of miR165/166 conferred a drought and cold resistance phenotype and hypersensitivity to ABA during seed germination and post-germination seedling development. We further show that the ABA hypersensitive phenotype is associated with a changed transcript abundance of ABA-responsive genes and a higher expression level of ABI4, which can be directly regulated by a miR165/166 target. Additionally, we found that reduction in miR165/166 expression leads to elevated ABA levels, which occurs at least partially through the increased expression of BG1, a gene that is directly regulated by a miR165/166 target. Taken together, our results uncover a novel role for miR165/166 in the regulation of ABA and abiotic stress responses and control of ABA homeostasis.
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Affiliation(s)
- Jun Yan
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Chunzhao Zhao
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Jianping Zhou
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Yu Yang
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Pengcheng Wang
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Xiaohong Zhu
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Guiliang Tang
- Department of Biological Sciences, Michigan Technological University, Houghton, Michigan, United States of America
| | - Ray A. Bressan
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
| | - Jian-Kang Zhu
- Shanghai Center for Plant Stress Biology, and Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, United States of America
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Li X, Tan DX, Jiang D, Liu F. Melatonin enhances cold tolerance in drought-primed wild-type and abscisic acid-deficient mutant barley. J Pineal Res 2016; 61:328-39. [PMID: 27299847 DOI: 10.1111/jpi.12350] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 06/13/2016] [Indexed: 12/13/2022]
Abstract
Melatonin is involved in multiple plant developmental processes and various stress responses. To explore the roles of melatonin played as well as its association with abscisic acid (ABA) in a process of drought priming-induced cold tolerance (DPICT), a wild-type barley and its ABA-deficient mutant Az34 counterpart were selected for comparison, in which the effects of melatonin application (either foliarly or rhizospherically) and/or drought priming on the cold tolerance of both types of barleys were systematically investigated. It was demonstrated that the early drought priming induced an increase of endogenous melatonin production, which is not ABA dependent. In addition, exogenously applied melatonin resulted in higher ABA concentration in the drought-primed plants than in the nonprimed plants when exposed to cold stress, indicating that ABA responded in a drought-dependent manner. The interplay of melatonin and ABA leads to plants maintaining better water status. Drought priming-induced melatonin accumulation enhanced the antioxidant capacity in both chloroplasts and mitochondria, which sustained the photosynthetic electron transport in photosynthetic apparatus of the plants under cold stress. These results suggest that the exogenous melatonin application enhances the DPICT by modulating subcellular antioxidant systems and ABA levels in barley.
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Affiliation(s)
- Xiangnan Li
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Tåstrup, Denmark
| | - Dun-Xian Tan
- Department of Cellular and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Dong Jiang
- National Engineering and Technology Center for Information Agriculture/Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Fulai Liu
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Tåstrup, Denmark.
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Park Y, Xu ZY, Kim SY, Lee J, Choi B, Lee J, Kim H, Sim HJ, Hwang I. Spatial Regulation of ABCG25, an ABA Exporter, Is an Important Component of the Mechanism Controlling Cellular ABA Levels. Plant Cell 2016; 28:2528-2544. [PMID: 27697789 PMCID: PMC5134978 DOI: 10.1105/tpc.16.00359] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 09/13/2016] [Accepted: 09/29/2016] [Indexed: 05/22/2023]
Abstract
The phytohormone abscisic acid (ABA) plays crucial roles in various physiological processes, including responses to abiotic stresses, in plants. Recently, multiple ABA transporters were identified. The loss-of-function and gain-of-function mutants of these transporters show altered ABA sensitivity and stomata regulation, highlighting the importance of ABA transporters in ABA-mediated processes. However, how the activity of these transporters is regulated remains elusive. Here, we show that spatial regulation of ATP BINDING CASETTE G25 (ABCG25), an ABA exporter, is an important mechanism controlling its activity. ABCG25, as a soluble green fluorescent protein (sGFP) fusion, was subject to posttranslational regulation via clathrin-dependent and adaptor protein complex-2-dependent endocytosis followed by trafficking to the vacuole. The levels of sGFP:ABCG25 at the plasma membrane (PM) were regulated by abiotic stresses and exogenously applied ABA; PM-localized sGFP:ABCG25 decreased under abiotic stress conditions via activation of endocytosis in an ABA-independent manner, but increased upon application of exogenous ABA via activation of recycling from early endosomes in an ABA-dependent manner. Based on these findings, we propose that the spatial regulation of ABCG25 is an important component of the mechanism by which plants fine-tune cellular ABA levels according to cellular and environmental conditions.
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Affiliation(s)
- Youngmin Park
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Zheng-Yi Xu
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Soo Youn Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Jihyeong Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Bongsoo Choi
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Juhun Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Hyeran Kim
- Center for Genome Engineering Institute for Basic Science, Yuseong-gu 305-811, Daejeon, South Korea
| | - Hee-Jung Sim
- Center for Genome Engineering Institute for Basic Science, Yuseong-gu 305-811, Daejeon, South Korea
| | - Inhwan Hwang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea
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Li XW, Wang Y, Yan F, Li JW, Zhao Y, Zhao X, Zhai Y, Wang QY. Overexpression of soybean R2R3-MYB transcription factor, GmMYB12B2, and tolerance to UV radiation and salt stress in transgenic Arabidopsis. Genet Mol Res 2016; 15:gmr6573. [PMID: 27323089 DOI: 10.4238/gmr.15026573] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
MYB, v-myb avian myeloblastosis viral oncogene homolog, proteins play central roles in plant stress response. Previously, we identified a novel R2R3-MYB transcription factor, GmMYB12B2, which affected the expression levels of some key enzyme genes involved in flavonoid biosynthesis in transgenic Arabidopsis. In the present study, we analyzed the expression levels of GmMYB12B2 under salt, low temperature, drought, abscisic acid (ABA), and ultraviolet (UV) radiation treatments in soybean using semi-quantitative reverse transcription polymerase chain reaction. The expression of GmMYB12B2 was drastically induced by UV irradiation and salt treatment, but no response was detected under low temperature, drought, and ABA stresses. A detailed characterization of the GmMYB12B2 overexpression lines revealed that GmMYB12B2 might be involved in response of plants to UV radiation and salt stresses. Transgenic Arabidopsis lines constitutively expressing GmMYB12B2 showed an increased tolerance to salt and UV radiation treatment compared with wild-type plants. The expression levels of certain salt stress-responsive genes, such as DREB2A and RD17, were found to be elevated in the transgenic plants. These results indicate that GmMYB12B2 acts as a regulator in the plant stress response.
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Affiliation(s)
- X W Li
- College of Plant Science, Jilin University, Changchun, China
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, Changchun, Jilin, China
| | - Y Wang
- College of Plant Science, Jilin University, Changchun, China
| | - F Yan
- College of Plant Science, Jilin University, Changchun, China
| | - J W Li
- College of Plant Science, Jilin University, Changchun, China
| | - Y Zhao
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer, China
| | - X Zhao
- Jilin Province Institute of Product Quality Supervision and Inspection, Changchun, China
| | - Y Zhai
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer, China
| | - Q Y Wang
- College of Plant Science, Jilin University, Changchun, China
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Kashiwakura YI, Kobayashi D, Jikumaru Y, Takebayashi Y, Nambara E, Seo M, Kamiya Y, Kushiro T, Kawakami N. Highly Sprouting-Tolerant Wheat Grain Exhibits Extreme Dormancy and Cold Imbibition-Resistant Accumulation of Abscisic Acid. Plant Cell Physiol 2016; 57:715-32. [PMID: 26971301 DOI: 10.1093/pcp/pcw051] [Citation(s) in RCA: 24] [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: 11/08/2015] [Accepted: 03/07/2016] [Indexed: 05/21/2023]
Abstract
Pre-harvest sprouting (PHS) of wheat (Triticum aestivum L.) grains induces hydrolyzing enzymes such as α-amylase, which considerably decreases wheat product quality. PHS occurs when cool and wet weather conditions before harvest break dormancy and induce grain germination. In this study, we used PHS-tolerant varieties, Gifu-komugi (Gifu) and OS38, to characterize the mechanisms of both dormancy breakage and dormancy maintenance at low temperatures. Physiologically mature Gifu grains exhibited dormancy after imbibition at 20°C, but germinated at 15°C. In contrast, OS38 grains remained dormant even at temperatures as low as 5°C. Embryo half-grains cut out from the dormant Gifu grains germinated by imbibition at 20°C, similar to conventional varieties worldwide. However, OS38 embryo half-grains were still dormant. Hormonome and pharmacological analyses suggested that ABA and gibberellin metabolism are important for temperature-dependent dormancy maintenance and breakage. Imbibition at 15°C decreased ABA levels but increased gibberellin levels in embryos of freshly harvested Gifu grains. Additionally, low temperatures induced expression of the ABA catabolism genes,TaABA8' OH1 and TaABA8' OH2, and the gibberellin biosynthesis gene,TaGA3ox2, in the embryos. However, in embryos of freshly harvested OS38 grains, ABA levels were increased while gibberellin levels were suppressed at 15°C. In these dormant embryos, low temperatures induced the TaNCED ABA biosynthesis genes, but suppressed TaABA8' OH2 and TaGA3ox2.These results show that the regulatory mechanism influencing the expression of ABA and gibberellin metabolism genes may be critical for dormancy maintenance and breakage at low temperatures. Our findings should help improve PHS-resistant wheat breeding programs.
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Affiliation(s)
- Yu-ichi Kashiwakura
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571 Japan Present address: Central Research Laboratory, Nitto Fuji Milling Co., Ltd., 6-2-1 Tokai, Ohta-ku, Tokyo, 143-0001 Japan. These authors contributed equally to this work
| | - Daisuke Kobayashi
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571 Japan These authors contributed equally to this work
| | - Yusuke Jikumaru
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan Present address: Agilent Technologies Japan, Ltd., 9-1, Takakura-machi, Hachioji-shi, Tokyo, 192-8510 Japan
| | - Yumiko Takebayashi
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
| | - Eiji Nambara
- Cell and Systems Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada
| | - Mitsunori Seo
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
| | - Yuji Kamiya
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa 230-0045, Japan
| | - Tetsuo Kushiro
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571 Japan
| | - Naoto Kawakami
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, 214-8571 Japan
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Li Y, Wang C, Liu X, Song J, Li H, Sui Z, Zhang M, Fang S, Chu J, Xin M, Xie C, Zhang Y, Sun Q, Ni Z. Up-regulating the abscisic acid inactivation gene ZmABA8ox1b contributes to seed germination heterosis by promoting cell expansion. J Exp Bot 2016; 67:2889-900. [PMID: 27034328 PMCID: PMC4861030 DOI: 10.1093/jxb/erw131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 05/26/2023]
Abstract
Heterosis has been widely used in agriculture, but the underlying molecular principles are still largely unknown. During seed germination, we observed that maize (Zea mays) hybrid B73/Mo17 was less sensitive than its parental inbred lines to exogenous abscisic acid (ABA), and endogenous ABA content in hybrid embryos decreased more rapidly than in the parental inbred lines. ZmABA8ox1b, an ABA inactivation gene, was consistently more highly up-regulated in hybrid B73/Mo17 than in its parental inbred lines at early stages of seed germination. Moreover, ectopic expression of ZmABA8ox1b obviously promoted seed germination in Arabidopsis Remarkably, microscopic observation revealed that cell expansion played a major role in the ABA-mediated maize seed germination heterosis, which could be attributed to the altered expression of cell wall-related genes.
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Affiliation(s)
- Yangyang Li
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Cheng Wang
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Xinye Liu
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Jian Song
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Hongjian Li
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Zhipeng Sui
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Ming Zhang
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Shuang Fang
- National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jinfang Chu
- National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Mingming Xin
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Chaojie Xie
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Yirong Zhang
- National Maize Improvement Center of China, China Agricultural University, Beijing 100193, China
| | - Qixin Sun
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
| | - Zhongfu Ni
- State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing 100193, China National Plant Gene Research Center (Beijing), Beijing 100193, China
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Fan Q, Song A, Jiang J, Zhang T, Sun H, Wang Y, Chen S, Chen F. CmWRKY1 Enhances the Dehydration Tolerance of Chrysanthemum through the Regulation of ABA-Associated Genes. PLoS One 2016; 11:e0150572. [PMID: 26938878 PMCID: PMC4777562 DOI: 10.1371/journal.pone.0150572] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 02/17/2016] [Indexed: 01/09/2023] Open
Abstract
WRKY transcription factors serve as antagonistic or synergistic regulators in a variety of abiotic stress responses in plants. Here, we show that CmWRKY1, a member of the group IIb WRKY family isolated from Chrysanthemum morifolium, exhibits no transcriptional activation in yeast cells. The subcellular localization examination showed that CmWRKY1 localizes to the nucleus in vivo. Furthermore, CmWRKY1-overexpressing transgenic lines exhibit enhanced dehydration tolerance in response to polyethylene glycol (PEG) treatment compared with wild-type plants. We further confirmed that the transgenic plants exhibit suppressed expression levels of genes negatively regulated by ABA, such as PP2C, ABI1 and ABI2, and activated expression levels of genes positively regulated by ABA, such as PYL2, SnRK2.2, ABF4, MYB2, RAB18, and DREB1A. Taken together, our results indicate that CmWRKY1 plays an important role in the response to drought in chrysanthemum through an ABA-mediated pathway.
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Affiliation(s)
- Qingqing Fan
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Province Engineering Lab for Modern Facility Agriculture Technology & Equipment, Nanjing, 210095, China
| | - Aiping Song
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jiafu Jiang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ting Zhang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hainan Sun
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yinjie Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Sumei Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
| | - Fadi Chen
- College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China
- Jiangsu Province Engineering Lab for Modern Facility Agriculture Technology & Equipment, Nanjing, 210095, China
- * E-mail:
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Castillo MC, Lozano-Juste J, González-Guzmán M, Rodriguez L, Rodriguez PL, León J. Inactivation of PYR/PYL/RCAR ABA receptors by tyrosine nitration may enable rapid inhibition of ABA signaling by nitric oxide in plants. Sci Signal 2015. [PMID: 26329583 DOI: 10.13140/rg.2.1.1632.6883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Abscisic acid (ABA) is a phytohormone that inhibits growth and enhances adaptation to stress in plants. ABA perception and signaling rely on its binding to receptors of the pyrabactin resistance1/PYR1-like/regulatory components of ABA receptors (PYR/PYL/RCAR) family, the subsequent inhibition of clade A type 2C protein phosphatases (PP2Cs), and the phosphorylation of ion channels and transcription factors by protein kinases of the SnRK2 family. Nitric oxide (NO) may inhibit ABA signaling because NO-deficient plants are hypersensitive to ABA. Regulation by NO often involves posttranslational modification of proteins. Mass spectrometry analysis of ABA receptors expressed in plants and recombinant receptors modified in vitro revealed that the receptors were nitrated at tyrosine residues and S-nitrosylated at cysteine residues. In an in vitro ABA-induced, PP2C inhibition assay, tyrosine nitration reduced receptor activity, whereas S-nitrosylated receptors were fully capable of ABA-induced inhibition of the phosphatase. PYR/PYL/RCAR proteins with nitrated tyrosine, which is an irreversible covalent modification, were polyubiquitylated and underwent proteasome-mediated degradation. We propose that tyrosine nitration, which requires NO and superoxide anions, is a rapid mechanism by which NO limits ABA signaling under conditions in which NO and reactive oxygen species are both produced.
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Affiliation(s)
- Mari-Cruz Castillo
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Jorge Lozano-Juste
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Miguel González-Guzmán
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Lesia Rodriguez
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Pedro L Rodriguez
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - José León
- Instituto de Biología Molecular y Celular de Plantas (Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia), CPI Edificio 8E, Avda. Ingeniero Fausto Elio s/n, 46022 Valencia, Spain.
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Chiang MH, Shen HL, Cheng WH. Genetic analyses of the interaction between abscisic acid and gibberellins in the control of leaf development in Arabidopsis thaliana. Plant Sci 2015; 236:260-271. [PMID: 26025539 DOI: 10.1016/j.plantsci.2015.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 01/16/2015] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 06/04/2023]
Abstract
Although abscisic acid (ABA) and gibberellins (GAs) play pivotal roles in many physiological processes in plants, their interaction in the control of leaf growth remains elusive. In this study, genetic analyses of ABA and GA interplay in leaf growth were performed in Arabidopsis thaliana. The results indicate that for the ABA and GA interaction, leaf growth of both the aba2/ga20ox1 and aba2/GA20ox1 plants, which were derived from the crosses of aba2×ga20ox1 and aba2×GA20ox1 overexpressor, respectively, exhibits partially additive effects but is similar to the aba2 mutant. Consistently, the transcriptome analysis suggests that a substantial proportion (45-65%) of the gene expression profile of aba2/ga20ox1 and aba2/GA20ox1 plants overlap and share a pattern similar to the aba2 mutant. Thus, these data suggest that ABA deficiency dominates leaf growth regardless of GA levels. Moreover, the gene ontology (GO) analysis indicates gene enrichment in the categories of hormone response, developmental and metabolic processes, and cell wall organization in these three genotypes. Leaf developmental genes are also involved in the ABA-GA interaction. Collectively, these data support that the genetic relationship of ABA and GA interaction involves multiple coordinated pathways rather than a simple linear pathway for the regulation of leaf growth.
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Affiliation(s)
- Ming-Hau Chiang
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
| | - Hwei-Ling Shen
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan
| | - Wan-Hsing Cheng
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan; Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan.
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Schnaubelt D, Queval G, Dong Y, Diaz-Vivancos P, Makgopa ME, Howell G, De Simone A, Bai J, Hannah MA, Foyer CH. Low glutathione regulates gene expression and the redox potentials of the nucleus and cytosol in Arabidopsis thaliana. Plant Cell Environ 2015; 38:266-79. [PMID: 24329757 DOI: 10.1111/pce.12252] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [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: 09/06/2013] [Revised: 11/27/2013] [Accepted: 11/28/2013] [Indexed: 05/04/2023]
Abstract
Reduced glutathione (GSH) is considered to exert a strong influence on cellular redox homeostasis and to regulate gene expression, but these processes remain poorly characterized. Severe GSH depletion specifically inhibited root meristem development, while low root GSH levels decreased lateral root densities. The redox potential of the nucleus and cytosol of Arabidopsis thaliana roots determined using roGFP probes was between -300 and -320 mV. Growth in the presence of the GSH-synthesis inhibitor buthionine sulfoximine (BSO) increased the nuclear and cytosolic redox potentials to approximately -260 mV. GSH-responsive genes including transcription factors (SPATULA, MYB15, MYB75), proteins involved in cell division, redox regulation (glutaredoxinS17, thioredoxins, ACHT5 and TH8) and auxin signalling (HECATE), were identified in the GSH-deficient root meristemless 1-1 (rml1-1) mutant, and in other GSH-synthesis mutants (rax1-1, cad2-1, pad2-1) as well as in the wild type following the addition of BSO. Inhibition of auxin transport had no effect on organ GSH levels, but exogenous auxin decreased the root GSH pool. We conclude that GSH depletion significantly increases the redox potentials of the nucleus and cytosol, and causes arrest of the cell cycle in roots but not shoots, with accompanying transcript changes linked to altered hormone responses, but not oxidative stress.
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Affiliation(s)
- Daniel Schnaubelt
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds, LS2 9JT, UK
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Carsjens C, Nguyen Ngoc Q, Guzy J, Knutzen F, Meier IC, Müller M, Finkeldey R, Leuschner C, Polle A. Intra-specific variations in expression of stress-related genes in beech progenies are stronger than drought-induced responses. Tree Physiol 2014; 34:1348-61. [PMID: 25430883 DOI: 10.1093/treephys/tpu093] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Rapidly decreasing water availability as a consequence of climate change is likely to endanger the range of long-lived tree species. A pressing question is, therefore, whether adaptation to drought exists in important temperate tree species like European beech (Fagus sylvatica L.), a wide-spread, dominant forest tree in Central Europe. Here, five beech stands were selected along a precipitation gradient from moist to dry conditions. Neutral genetic markers revealed strong variation within and little differentiation between the populations. Natural regeneration from these stands was transferred to a common garden and used to investigate the expression of genes for abscisic acid (ABA)-related drought signaling [9-cis-epoxy-dioxygenase (NCED), protein phosphatase 2C (PP2C), early responsive to dehydration (ERD)] and stress protection [ascorbate peroxidase (APX), superoxide dismutase (SOD), aldehyde dehydrogenase (ALDH), glutamine amidotransferase (GAT)] that are involved in drought acclimation. We hypothesized that progenies from dry sites exhibit constitutively higher expression levels of ABA- and stress-related genes and are less drought responsive than progenies from moist sites. Transcript levels and stress responses (leaf area loss, membrane integrity) of well-irrigated and drought-stressed plants were measured during the early, mid- and late growing season. Principal component (PC) analysis ordered the beech progenies according to the mean annual precipitation at tree origin by the transcript levels of SOD, ALDH, GAT and ERD as major loadings along PC1. PC2 separated moist and drought treatments with PP2C levels as important loading. These results suggest that phosphatase-mediated signaling is flexibly acclimated to the current requirements, whereas stress compensatory measures exhibited genotypic variation, apparently underlying climate selection. In contrast to expectation, the drought responses were less pronounced than the progeny-related differences and the transcript levels were constitutively lower in beeches from dry than from moist sites. These results imply that beeches from dry origins may have evolved mechanisms to avoid oxidative stress.
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Affiliation(s)
- Caroline Carsjens
- Forstbotanik und Baumphysiologie, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Quynh Nguyen Ngoc
- Forstbotanik und Baumphysiologie, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Jonas Guzy
- Forstbotanik und Baumphysiologie, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Florian Knutzen
- Plant Ecology, Albrecht von Haller Institute for Plant Sciences, Georg-August Universität Göttingen, Untere Karspüle 2, 37073 Göttingen, Germany
| | - Ina Christin Meier
- Plant Ecology, Albrecht von Haller Institute for Plant Sciences, Georg-August Universität Göttingen, Untere Karspüle 2, 37073 Göttingen, Germany
| | - Markus Müller
- Forstgenetik und Forstpflanzenzüchtung, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Reiner Finkeldey
- Forstgenetik und Forstpflanzenzüchtung, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Christoph Leuschner
- Plant Ecology, Albrecht von Haller Institute for Plant Sciences, Georg-August Universität Göttingen, Untere Karspüle 2, 37073 Göttingen, Germany
| | - Andrea Polle
- Forstbotanik und Baumphysiologie, Büsgen-Institute, Georg-August Universität Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
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Rojas-Pierce M, Whippo CW, Davis PA, Hangarter RP, Springer PS. PLASTID MOVEMENT IMPAIRED1 mediates ABA sensitivity during germination and implicates ABA in light-mediated Chloroplast movements. Plant Physiol Biochem 2014; 83:185-193. [PMID: 25154696 DOI: 10.1016/j.plaphy.2014.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 05/12/2014] [Accepted: 07/17/2014] [Indexed: 06/03/2023]
Abstract
The plant hormone abscisic acid (ABA) controls many aspects of plant growth and development, including seed development, germination and responses to water-deficit stress. A complex ABA signaling network integrates environmental signals including water availability and light intensity and quality to fine-tune the response to a changing environment. To further define the regulatory pathways that control water-deficit and ABA responses, we carried out a gene-trap tagging screen for water-deficit-regulated genes in Arabidopsis thaliana. This screen identified PLASTID MOVEMENT IMPAIRED1 (PMI1), a gene involved in blue-light-induced chloroplast movement, as functioning in ABA-response pathways. We provide evidence that PMI1 is involved in the regulation of seed germination by ABA, acting upstream of the intersection between ABA and low-glucose signaling pathways. Furthermore, PMI1 participates in the regulation of ABA accumulation during periods of water deficit at the seedling stage. The combined phenotypes of pmi1 mutants in chloroplast movement and ABA responses indicate that ABA signaling may modulate chloroplast motility. This result was further supported by the detection of altered chloroplast movements in the ABA mutants aba1-6, aba2-1 and abi1-1.
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Affiliation(s)
- Marcela Rojas-Pierce
- Department of Botany and Plant Sciences and the Center for Plant Cell Biology, University of California, Riverside, CA 92521, USA; Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Craig W Whippo
- Department of Biology, Indiana University, Bloomington, IN 47405-3700, USA; Department of Natural Science, Dickinson State University, Dickinson, ND 58601, USA
| | - Phillip A Davis
- Department of Biology, Indiana University, Bloomington, IN 47405-3700, USA
| | - Roger P Hangarter
- Department of Biology, Indiana University, Bloomington, IN 47405-3700, USA
| | - Patricia S Springer
- Department of Botany and Plant Sciences and the Center for Plant Cell Biology, University of California, Riverside, CA 92521, USA
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Marchand G, Huynh-Thu VA, Kane NC, Arribat S, Varès D, Rengel D, Balzergue S, Rieseberg LH, Vincourt P, Geurts P, Vignes M, Langlade NB. Bridging physiological and evolutionary time-scales in a gene regulatory network. New Phytol 2014; 203:685-696. [PMID: 24786523 DOI: 10.1111/nph.12818] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 11/15/2013] [Accepted: 03/17/2014] [Indexed: 06/03/2023]
Abstract
Gene regulatory networks (GRNs) govern phenotypic adaptations and reflect the trade-offs between physiological responses and evolutionary adaptation that act at different time-scales. To identify patterns of molecular function and genetic diversity in GRNs, we studied the drought response of the common sunflower, Helianthus annuus, and how the underlying GRN is related to its evolution. We examined the responses of 32,423 expressed sequences to drought and to abscisic acid (ABA) and selected 145 co-expressed transcripts. We characterized their regulatory relationships in nine kinetic studies based on different hormones. From this, we inferred a GRN by meta-analyses of a Gaussian graphical model and a random forest algorithm and studied the genetic differentiation among populations (FST ) at nodes. We identified two main hubs in the network that transport nitrate in guard cells. This suggests that nitrate transport is a critical aspect of the sunflower physiological response to drought. We observed that differentiation of the network genes in elite sunflower cultivars is correlated with their position and connectivity. This systems biology approach combined molecular data at different time-scales and identified important physiological processes. At the evolutionary level, we propose that network topology could influence responses to human selection and possibly adaptation to dry environments.
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Affiliation(s)
- Gwenaëlle Marchand
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, F-31326, Castanet-Tolosan, France
- CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, F-31326, Castanet-Tolosan, France
| | - Vân Anh Huynh-Thu
- Department of Electrical Engineering and Computer Science and GIGA-R, Systems and Modeling, University of Liège, Liège, Belgium
| | - Nolan C Kane
- Department of Ecology and Evolutionary Biology, University of Colorado at Boulder, Boulder, CO, 80309, USA
| | - Sandrine Arribat
- INRA, Unité de Recherche en Génomique Végétale (URGV), UMR1165 - Université d'Evry Val d'Essonne - ERL CNRS 8196, CP 5708, F-91057, Evry Cedex, France
| | - Didier Varès
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, F-31326, Castanet-Tolosan, France
- CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, F-31326, Castanet-Tolosan, France
| | - David Rengel
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, F-31326, Castanet-Tolosan, France
- CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, F-31326, Castanet-Tolosan, France
| | - Sandrine Balzergue
- INRA, Unité de Recherche en Génomique Végétale (URGV), UMR1165 - Université d'Evry Val d'Essonne - ERL CNRS 8196, CP 5708, F-91057, Evry Cedex, France
| | - Loren H Rieseberg
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Patrick Vincourt
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, F-31326, Castanet-Tolosan, France
- CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, F-31326, Castanet-Tolosan, France
| | - Pierre Geurts
- Department of Electrical Engineering and Computer Science and GIGA-R, Systems and Modeling, University of Liège, Liège, Belgium
| | - Matthieu Vignes
- INRA, Mathématiques et Informatique Appliquées (MIA), UPR875, F-31326, Castanet-Tolosan, France
| | - Nicolas B Langlade
- INRA, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR441, F-31326, Castanet-Tolosan, France
- CNRS, Laboratoire des Interactions Plantes-Microorganismes (LIPM), UMR2594, F-31326, Castanet-Tolosan, France
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Yang R, Yang T, Zhang H, Qi Y, Xing Y, Zhang N, Li R, Weeda S, Ren S, Ouyang B, Guo YD. Hormone profiling and transcription analysis reveal a major role of ABA in tomato salt tolerance. Plant Physiol Biochem 2014; 77:23-34. [PMID: 24531233 DOI: 10.1016/j.plaphy.2014.01.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [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: 09/14/2013] [Accepted: 01/25/2014] [Indexed: 05/24/2023]
Abstract
The response and adaptation of plants to different environmental stresses are of great interest as they provide the key to understanding the mechanisms underlying stress tolerance. In this study, the changing patterns of four endogenous hormones and various physiological and biochemical parameters of both a salt-tolerant (LA2711) and a salt-sensitive (ZS-5) tomato cultivar were examined under salt stress and non-stress conditions. Additionally, the transcription of key genes in the abscisic acid (ABA) biosynthesis and metabolism were analyzed at different time points. The results indicated that gene expression responsible for ABA biosynthesis and metabolism coincided with the hormone level, and SlNCED1 and SlCYP707A3 may play major roles in the process. LA2711 performed superior to ZS-5 on various parameters, including seed germination, Na(+) compartmentation, selective absorption of K(+), and antioxidant enzymes activity. The difference in salt tolerance between the two genotypes could be attributed to the different levels of ABA due to differences in gene expression of key genes in ABA biosynthesis and metabolism. Although gibberellin, cytokinin and auxin were involved, our results indicated that ABA signaling plays a major role in tomato salt tolerance. As compared to ZS-5, LA2711 had a higher capability to selectively absorb and redistribute K(+) and a higher tolerance to Na(+) in young leaves, which may be the main physiological mechanisms of salt tolerance.
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Affiliation(s)
- Rongchao Yang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Ting Yang
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Haijun Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Yan Qi
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Yanxia Xing
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Na Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Ren Li
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China
| | - Sarah Weeda
- School of Agriculture, Virginia State University, PO Box 9061, Petersburg, VA 23806, USA
| | - Shuxin Ren
- School of Agriculture, Virginia State University, PO Box 9061, Petersburg, VA 23806, USA
| | - Bo Ouyang
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, PR China.
| | - Yang-Dong Guo
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, PR China.
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Xu D, Li J, Gangappa SN, Hettiarachchi C, Lin F, Andersson MX, Jiang Y, Deng XW, Holm M. Convergence of Light and ABA signaling on the ABI5 promoter. PLoS Genet 2014; 10:e1004197. [PMID: 24586210 PMCID: PMC3937224 DOI: 10.1371/journal.pgen.1004197] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 01/08/2014] [Indexed: 12/11/2022] Open
Abstract
Light is one of the most important environmental cues regulating multiple aspects of plant growth and development, and abscisic acid (ABA) is a plant hormone that plays important roles during many phases of the plant life cycle and in plants' responses to various environmental stresses. How plants integrate the external light signal with endogenous ABA pathway for better adaptation and survival remains poorly understood. Here, we show that BBX21 (also known as SALT TOLERANCE HOMOLOG 2), a B-box (BBX) protein previously shown to positively regulate seedling photomorphogenesis, is also involved in ABA signaling. Our genetic data show that BBX21 may act upstream of several ABA INSENSITIVE (ABI) genes and ELONGATED HYPOCOTYL 5 (HY5) in ABA control of seed germination. Previous studies showed that HY5 acts as a direct activator of ABI5 expression, and that BBX21 interacts with HY5. We further demonstrate that BBX21 negatively regulates ABI5 expression by interfering with HY5 binding to the ABI5 promoter. In addition, ABI5 was shown to directly activate its own expression, whereas BBX21 negatively regulates this activity by directly interacting with ABI5. Together, our study indicates that BBX21 coordinates with HY5 and ABI5 on the ABI5 promoter and that these transcriptional regulators work in concert to integrate light and ABA signaling in Arabidopsis thaliana. Many factors such as light, phytohormone abscisic acid (ABA), etc., regulate multiple developmental processes throughout the plants' life cycle. Light promotes seed germination and ABA maintains seed dormancy. However, little is known about how light and ABA signaling pathways interact with each other. It was previously reported that Arabidopsis HY5, a well-known bZIP transcription factor involved in promoting seedling photomorphogenesis, is involved in ABA signaling by directly activating ABI5 expression. Here, we report that the B-box protein BBX21 negatively regulates ABI5 expression by interfering with HY5 binding to the ABI5 promoter. Interestingly, ABI5 was shown to directly bind to its own promoter and activate its expression, whereas BBX21 also negatively regulates this activity by interacting with ABI5. Together, our study shows that light and ABA signaling pathways converge on the ABI5 promoter, on which BBX21 acts as a negative regulator of ABI5 expression.
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Affiliation(s)
- Dongqing Xu
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
- Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Jigang Li
- Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut, United States of America
| | - Sreeramaiah N. Gangappa
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
| | - Chamari Hettiarachchi
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
| | - Fang Lin
- Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
| | - Mats X. Andersson
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
| | - Yan Jiang
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
| | - Xing Wang Deng
- Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut, United States of America
- * E-mail:
| | - Magnus Holm
- Department of Biological and Environmental Sciences, Gothenburg University, Gothenburg, Sweden
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49
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Roos J, Bejai S, Oide S, Dixelius C. RabGAP22 is required for defense to the vascular pathogen Verticillium longisporum and contributes to stomata immunity. PLoS One 2014; 9:e88187. [PMID: 24505423 PMCID: PMC3913773 DOI: 10.1371/journal.pone.0088187] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 01/03/2014] [Indexed: 02/03/2023] Open
Abstract
Verticillium longisporum is a soil-borne pathogen with a preference for plants within the family Brassicaceae. Following invasion of the roots, the fungus proliferates in the plant vascular system leading to stunted plant growth, chlorosis and premature senescence. RabGTPases have been demonstrated to play a crucial role in regulating multiple responses in plants. Here, we report on the identification and characterization of the Rab GTPase-activating protein RabGAP22 gene from Arabidopsis, as an activator of multiple components in the immune responses to V. longisporum. RabGAP22Pro :GUS transgenic lines showed GUS expression predominantly in root meristems, vascular tissues and stomata, whereas the RabGAP22 protein localized in the nucleus. Reduced RabGAP22 transcript levels in mutants of the brassinolide (BL) signaling gene BRI1-associated receptor kinase 1, together with a reduction of fungal proliferation following BL pretreatment, suggested RabGAP22 to be involved in BL-mediated responses. Pull-down assays revealed serine:glyoxylate aminotransferase (AGT1) as an interacting partner during V. longisporum infection and bimolecular fluorescence complementation (BiFC) showed the RabGAP22-AGT1 protein complex to be localized in the peroxisomes. Further, fungal-induced RabGAP22 expression was found to be associated with elevated endogenous levels of the plant hormones jasmonic acid (JA) and abscisic acid (ABA). An inadequate ABA response in rabgap22-1 mutants, coupled with a stomata-localized expression of RabGAP22 and impairment of guard cell closure in response to V. longisporum and Pseudomonas syringae, suggest that RabGAP22 has multiple roles in innate immunity.
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Affiliation(s)
- Jonas Roos
- Department of Plant Biology, Swedish University of Agricultural Sciences, Linnean Center for Plant Biology, Uppsala, Sweden
| | - Sarosh Bejai
- Department of Plant Biology, Swedish University of Agricultural Sciences, Linnean Center for Plant Biology, Uppsala, Sweden
| | - Shinichi Oide
- Molecular Microbiology and Biotechnology group, Research Institute of Innovative Technology for the Earth, Kizugawa, Kyoto, Japan
| | - Christina Dixelius
- Department of Plant Biology, Swedish University of Agricultural Sciences, Linnean Center for Plant Biology, Uppsala, Sweden
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50
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Lai B, Li XJ, Hu B, Qin YH, Huang XM, Wang HC, Hu GB. LcMYB1 is a key determinant of differential anthocyanin accumulation among genotypes, tissues, developmental phases and ABA and light stimuli in Litchi chinensis. PLoS One 2014; 9:e86293. [PMID: 24466010 PMCID: PMC3897698 DOI: 10.1371/journal.pone.0086293] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 12/11/2013] [Indexed: 11/19/2022] Open
Abstract
The red coloration of litchi fruit depends on the accumulation of anthocyanins. The anthocyanins level in litchi fruit varies widely among cultivars, developmental stages and environmental stimuli. Previous studies on various plant species demonstrate that anthocyanin biosynthesis is controlled at the transcriptional level. Here, we describe a litchi R2R3-MYB transcription factor gene, LcMYB1, which demonstrates a similar sequence as other known anthocyanin regulators. The transcription levels of the LcMYB1 and anthocyanin biosynthetic genes were investigated in samples with different anthocyanin levels. The expression of LcMYB1 was strongly associated with tissue anthocyanin content. LcMYB1 transcripts were only detected in anthocyanin-accumulating tissues and were positively correlated with anthocyanin accumulation in the pericarps of 12 genotypes. ABA and sunlight exposure promoted, whereas CPPU and bagging inhibited the expression of LcMYB1 and anthocyanin accumulation in the pericarp. Cis-elements associated with light responsiveness and abscisic acid responsiveness were identified in the promoter region of LcMYB1. Among the 6 structural genes tested, only LcUFGT was highly correlated with LcMYB1. These results suggest that LcMYB1 controls anthocyanin biosynthesis in litchi and LcUFGT might be the structural gene that is targeted and regulated by LcMYB1. Furthermore, the overexpression of LcMYB1 induced anthocyanin accumulation in all tissues in tobacco, confirming the function of LcMYB1 in the regulation of anthocyanin biosynthesis. The upregulation of NtAn1b in response to LcMYB1 overexpression seems to be essential for anthocyanin accumulation in the leaf and pedicel. In the reproductive tissues of transgenic tobacco, however, increased anthocyanin accumulation is independent of tobacco's endogenous MYB and bHLH transcriptional factors, but associated with the upregulation of specific structural genes.
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Affiliation(s)
- Biao Lai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
| | - Xiao-Jing Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
| | - Bing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
| | - Yong-Hua Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
| | - Xu-Ming Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
| | - Hui-Cong Wang
- Physiological Laboratory for South China Fruits, College of Horticulture, South China Agricultural University, Guangzhou, People's Republic of China
| | - Gui-Bing Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Horticulture, South China Agricultural University, Guangzhou, Guangdong, People's Republic of China
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