1
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Jing X, Wang P, Liu J, Xiang M, Song X, Wang C, Li P, Li H, Wu Z, Zhang C. A viral protein competitively bound to rice CIPK23 inhibits potassium absorption and facilitates virus systemic infection in rice. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:2348-2363. [PMID: 38578842 PMCID: PMC11258980 DOI: 10.1111/pbi.14350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 02/02/2024] [Accepted: 03/20/2024] [Indexed: 04/07/2024]
Abstract
Potassium (K+) plays a crucial role as a macronutrient in the growth and development of plants. Studies have definitely determined the vital roles of K+ in response to pathogen invasion. Our previous investigations revealed that rice plants infected with rice grassy stunt virus (RGSV) displayed a reduction in K+ content, but the mechanism by which RGSV infection subverts K+ uptake remains unknown. In this study, we found that overexpression of RGSV P1, a specific viral protein encoded by viral RNA1, results in enhanced sensitivity to low K+ stress and exhibits a significantly lower rate of K+ influx compared to wild-type rice plants. Further investigation revealed that RGSV P1 interacts with OsCIPK23, an upstream regulator of Shaker K+ channel OsAKT1. Moreover, we found that the P1 protein recruits the OsCIPK23 to the Cajal bodies (CBs). In vivo assays demonstrated that the P1 protein competitively binds to OsCIPK23 with both OsCBL1 and OsAKT1. In the nucleus, the P1 protein enhances the binding of OsCIPK23 to OsCoilin, a homologue of the signature protein of CBs in Arabidopsis, and facilitates their trafficking through these CB structures. Genetic analysis indicates that mutant in oscipk23 suppresses RGSV systemic infection. Conversely, osakt1 mutants exhibited increased sensitivity to RGSV infection. These findings suggest that RGSV P1 hinders the absorption of K+ in rice plants by recruiting the OsCIPK23 to the CB structures. This process potentially promotes virus systemic infection but comes at the expense of inhibiting OsAKT1 activity.
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Affiliation(s)
- Xinxin Jing
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
- Fujian Province Key Laboratory of Plant VirologyCollege of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhouChina
| | - Pengyue Wang
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
- Fujian Province Key Laboratory of Plant VirologyCollege of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhouChina
| | - Jianjian Liu
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
- Hubei Engineering Research Center for Pest Forewarning and ManagementCollege of AgronomyYangtze UniversityJingzhouChina
| | - Meirong Xiang
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
| | - Xia Song
- Fujian Province Key Laboratory of Plant VirologyCollege of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhouChina
| | - Chaonan Wang
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
| | - Pengbai Li
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
| | - Honglian Li
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
| | - Zujian Wu
- Fujian Province Key Laboratory of Plant VirologyCollege of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhouChina
| | - Chao Zhang
- The Engineering Research Center for Plant Health Protection Technology in Henan ProvinceCollege of Plant ProtectionHenan Agricultural UniversityZhengzhouChina
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2
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Yoshida T, Mergner J, Yang Z, Liu J, Kuster B, Fernie AR, Grill E. Integrating multi-omics data reveals energy and stress signaling activated by abscisic acid in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 119:1112-1133. [PMID: 38613775 DOI: 10.1111/tpj.16765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 03/24/2024] [Accepted: 03/31/2024] [Indexed: 04/15/2024]
Abstract
Phytohormones are essential signaling molecules regulating various processes in growth, development, and stress responses. Genetic and molecular studies, especially using Arabidopsis thaliana (Arabidopsis), have discovered many important players involved in hormone perception, signal transduction, transport, and metabolism. Phytohormone signaling pathways are extensively interconnected with other endogenous and environmental stimuli. However, our knowledge of the huge and complex molecular network governed by a hormone remains limited. Here we report a global overview of downstream events of an abscisic acid (ABA) receptor, REGULATORY COMPONENTS OF ABA RECEPTOR (RCAR) 6 (also known as PYRABACTIN RESISTANCE 1 [PYR1]-LIKE [PYL] 12), by integrating phosphoproteomic, proteomic and metabolite profiles. Our data suggest that the RCAR6 overexpression constitutively decreases the protein levels of its coreceptors, namely clade A protein phosphatases of type 2C, and activates sucrose non-fermenting-1 (SNF1)-related protein kinase 1 (SnRK1) and SnRK2, the central regulators of energy and ABA signaling pathways. Furthermore, several enzymes in sugar metabolism were differentially phosphorylated and expressed in the RCAR6 line, and the metabolite profile revealed altered accumulations of several organic acids and amino acids. These results indicate that energy- and water-saving mechanisms mediated by the SnRK1 and SnRK2 kinases, respectively, are under the control of the ABA receptor-coreceptor complexes.
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Affiliation(s)
- Takuya Yoshida
- Lehrstuhl für Botanik, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Julia Mergner
- Bavarian Center for Biomolecular Mass Spectrometry at Klinikum rechts der Isar (BayBioMS@MRI), Technical University of Munich, Munich, Germany
- Chair of Proteomics and Bioanalytics, Technical University of Munich, Freising, Germany
| | - Zhenyu Yang
- Lehrstuhl für Botanik, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
| | - Jinghui Liu
- Lehrstuhl für Botanik, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
| | - Bernhard Kuster
- Chair of Proteomics and Bioanalytics, Technical University of Munich, Freising, Germany
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476, Potsdam-Golm, Germany
| | - Erwin Grill
- Lehrstuhl für Botanik, Technische Universität München, Emil-Ramann-Str. 4, 85354, Freising, Germany
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3
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Han J, Liu CX, Liu J, Wang CR, Wang SC, Miao G. AGC kinases OXI1 and AGC2-2 regulate camalexin secretion and disease resistance by phosphorylating transporter PDR6. PLANT PHYSIOLOGY 2024; 195:1835-1850. [PMID: 38535832 DOI: 10.1093/plphys/kiae186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 02/28/2024] [Indexed: 06/30/2024]
Abstract
Plant transporters regulating the distribution of secondary metabolites play critical roles in defending against pathogens, insects, and interacting with beneficial microbes. The phosphorylation of these transporters can alter their activity, stability, and intracellular protein trafficking. However, the regulatory mechanism underlying this modification remains elusive. In this study, we discovered two orthologs of mammalian PKA, PKG, and PKC (AGC) kinases, oxidative signal-inducible 1 (OXI1) and its closest homologue, AGC subclass 2 member 2 (AGC2-2; 75% amino acid sequence identity with OXI1), associated with the extracellular secretion of camalexin and Arabidopsis (Arabidopsis thaliana) resistance to Pseudomonas syringae, and Botrytis cinerea. These kinases can undergo in vitro kinase reactions with three pleiotropic drug resistance (PDR) transporters: PDR6, PDR8, and PDR12. Moreover, our investigation confirmed PDR6 interaction with OXI1 and AGC2-2. By performing LC-MS/MS and parallel reaction monitoring, we identified the phosphorylation sites on PDR6 targeted by these kinases. Notably, chitin-induced PDR6 phosphorylation at specific residues, namely S31, S33, S827, and T832. Additional insights emerged by expressing dephosphorylated PDR6 variants in a pdr6 mutant background, revealing that the target residues S31, S33, and S827 promote PDR6 efflux activity, while T832 potentially contributes to PDR6 stability within the plasma membrane. The findings of this study elucidate partial mechanisms involved in the activity regulation of PDR-type transporters, providing valuable insights for their potential application in future plant breeding endeavors.
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Affiliation(s)
- Juan Han
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
- Institute of Digital Ecology and Health, Huainan Normal University, Huainan, Anhui Province 232038, China
| | - Chang-Xin Liu
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
| | - Jian Liu
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
| | - Cheng-Run Wang
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
- Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan Normal University, Huainan, Anhui Province 232038, China
| | - Shun-Chang Wang
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
- Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan Normal University, Huainan, Anhui Province 232038, China
| | - Guopeng Miao
- Department of Bioengineering, Huainan Normal University, Huainan, Anhui Province 232038, China
- Key Laboratory of Bioresource and Environmental Biotechnology of Anhui Higher Education Institutes, Huainan Normal University, Huainan, Anhui Province 232038, China
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4
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Niu F, Cui X, Yang B, Wang R, Zhao P, Zhao X, Zhang H, Fan X, Li Y, Deyholos MK, Jiang YQ. WRKY6 transcription factor modulates root potassium acquisition through promoting expression of AKT1 in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 118:1652-1667. [PMID: 38418388 DOI: 10.1111/tpj.16703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 02/01/2024] [Accepted: 02/14/2024] [Indexed: 03/01/2024]
Abstract
Potassium (K+), being an essential macronutrient in plants, plays a central role in many aspects. Root growth is highly plastic and is affected by many different abiotic stresses including nutrient deficiency. The Shaker-type K+ channel Arabidopsis (Arabidopsis thaliana) K+ Transporter 1 (AKT1) is responsible for K+ uptake under both low and high external K+ conditions. However, the upstream transcription factor of AKT1 is not clear. Here, we demonstrated that the WRKY6 transcription factor modulates root growth to low potassium (LK) stress in Arabidopsis. WRKY6 showed a quick response to LK stress and also to many other abiotic stress treatments. The two wrky6 T-DNA insertion mutants were highly sensitive to LK treatment, whose primary root lengths were much shorter, less biomass and lower K+ content in roots than those of wild-type plants, while WRKY6-overexpression lines showed opposite phenotypes. A further investigation showed that WRKY6 regulated the expression of the AKT1 gene via directly binding to the W-box elements in its promoter through EMSA and ChIP-qPCR assays. A dual luciferase reporter analysis further demonstrated that WRKY6 enhanced the transcription of AKT1. Genetic analysis further revealed that the overexpression of AKT1 greatly rescued the short root phenotype of the wrky6 mutant under LK stress, suggesting AKT1 is epistatic to WRKY6 in the control of LK response. Further transcriptome profiling suggested that WRKY6 modulates LK response through a complex regulatory network. Thus, this study unveils a transcription factor that modulates root growth under potassium deficiency conditions by affecting the potassium channel gene AKT1 expression.
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Affiliation(s)
- Fangfang Niu
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xing Cui
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Bo Yang
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Rui Wang
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Peiyu Zhao
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xinjie Zhao
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Hanfeng Zhang
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaojiang Fan
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Ye Li
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Michael K Deyholos
- Department of Biology, University of British Columbia, Okanagan Campus, Kelowna, V1V 1V7, Canada
| | - Yuan-Qing Jiang
- National Key Laboratory of Crop Improvement for Stress Tolerance and Production, College of Life Science, Northwest A&F University, Yangling, 712100, Shaanxi, China
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Chen JS, Wang ST, Mei Q, Sun T, Hu JT, Xiao GS, Chen H, Xuan YH. The role of CBL-CIPK signaling in plant responses to biotic and abiotic stresses. PLANT MOLECULAR BIOLOGY 2024; 114:53. [PMID: 38714550 DOI: 10.1007/s11103-024-01417-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/06/2024] [Indexed: 05/10/2024]
Abstract
Plants have a variety of regulatory mechanisms to perceive, transduce, and respond to biotic and abiotic stress. One such mechanism is the calcium-sensing CBL-CIPK system responsible for the sensing of specific stressors, such as drought or pathogens. CBLs perceive and bind Calcium (Ca2+) in response to stress and then interact with CIPKs to form an activated complex. This leads to the phosphorylation of downstream targets, including transporters and ion channels, and modulates transcription factor levels and the consequent levels of stress-associated genes. This review describes the mechanisms underlying the response of the CBL-CIPK pathway to biotic and abiotic stresses, including regulating ion transport channels, coordinating plant hormone signal transduction, and pathways related to ROS signaling. Investigation of the function of the CBL-CIPK pathway is important for understanding plant stress tolerance and provides a promising avenue for molecular breeding.
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Affiliation(s)
- J S Chen
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - S T Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, China
| | - Q Mei
- College of Plant Protection, Shenyang Agricultural University, Shenyang, 110866, China
| | - T Sun
- Chongqing Customs Technology Center, Chongqing, 400020, China
| | - J T Hu
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China
| | - G S Xiao
- College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China.
| | - H Chen
- College of Life Science, Northeast Forestry University, Harbin, 150040, China.
| | - Y H Xuan
- State Key Laboratory of Elemento-Organic Chemistry and Department of Plant Protection, National Pesticide Engineering Research Center (Tianjin), Nankai University, Tianjin, 300071, China.
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6
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Amo J, Martínez-Martínez A, Martínez V, Rubio F, Nieves-Cordones M. Relevance of the SlCIPK23 kinase in Na + uptake and root morphology in K +-starved tomato plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108373. [PMID: 38266564 DOI: 10.1016/j.plaphy.2024.108373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 01/26/2024]
Abstract
The beneficial effects of Na+ as a substitute for K+ have been well-documented at the physiological level. However, the transport systems and regulatory mechanisms that allow Na+ acquisition under K+ deficiency remain poorly understood in the majority of land plants. In tomato, SlCIPK23 kinase was involved in Na+ accumulation in K+-starved plants, in addition to activating the LKT1 K+ channel and the K+ transporter SlHAK5. We used the central role of SlCIPK23 in K+ and Na+ acquisition to study which molecular entities mediate Na+ uptake with knockout tomato mutants and expression in heterologous systems. Two main pathways for Na+ uptake were deduced in tomato plants: an NH4+-sensitive pathway dependent on SlCIPK23, and a second one sensitive to Ba2+, Ca2+, La3+, and Li+. The addition of Na+ (10 mM) to lkt1, slhak5, or slcipk23 mutant KO lines produced interesting changes in root morphology. In particular, the roots of slcipk23 plants were longer and lighter than those of the WT under K+-deficient conditions and this effect was reversed by the addition of 10 mM Na+. These results provide a stimulating perspective for the study of the beneficial effects of Na+ in crops.
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Affiliation(s)
- Jesús Amo
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada Del Segura- CSIC, Murcia, Spain
| | - Almudena Martínez-Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada Del Segura- CSIC, Murcia, Spain
| | - Vicente Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada Del Segura- CSIC, Murcia, Spain
| | - Francisco Rubio
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada Del Segura- CSIC, Murcia, Spain
| | - Manuel Nieves-Cordones
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada Del Segura- CSIC, Murcia, Spain.
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7
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Bork A, Smits SHJ, Schmitt L. Calcium binding of AtCBL1: Structural and functional insights. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2024; 1872:140967. [PMID: 37757925 DOI: 10.1016/j.bbapap.2023.140967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 09/29/2023]
Abstract
CBL1 is an EF hand Ca2+ binding protein from A. thaliana that is involved in the detection of cellular Ca2+ signals and the downstream signal transmission by interaction with the protein kinase CIPK23. So far, the structure and calcium ion binding affinities of CBL1 remain elusive. In this study it was observed that CBL1 tends to form higher oligomeric states due to an intrinsic hydrophobicity and the presence of the detergent BriJ35 was required for the purification of monomeric and functional protein. Functional insights into the in vitro Ca2+ binding capabilities of CBL1 were obtained by isothermal titration calorimetry (ITC) of the wildtype protein as well as single site EF hand mutants. Based on our results, a binding model of CBL1 for Ca2+in vivo is proposed. Additionally, upon both, ITC measurements and the analysis of an AlphaFold2 model of CBL1, we could gain first insights into the formation of the dimer interface. We could identify an area around EF hand 4 to be relevant for the structural and functional integrity of monomeric CBL1 and likely EF hand 1 to be involved in the dimer interface.
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Affiliation(s)
- Alexandra Bork
- Institute of Biochemistry, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Sander H J Smits
- Institute of Biochemistry, Heinrich Heine University Düsseldorf, Düsseldorf, Germany; Center for Structural Studies, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Lutz Schmitt
- Institute of Biochemistry, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
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Mallikarjuna MG, Tomar R, Lohithaswa HC, Sahu S, Mishra DC, Rao AR, Chinnusamy V. Genome-wide identification of potassium channels in maize showed evolutionary patterns and variable functional responses to abiotic stresses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 206:108235. [PMID: 38039585 DOI: 10.1016/j.plaphy.2023.108235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/08/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
Potassium (K) channels are essential components of plant biology, mediating not only K ion (K+) homeostasis but also regulating several physiological processes and stress tolerance. In the current investigation, we identified 27 K+ channels in maize and deciphered the evolution and divergence pattern with four monocots and five dicot species. Chromosomal localization and expansion of K+ channel genes showed uneven distribution and were independent of genome size. The dispersed duplication is the major force in expanding K+ channels in the target genomes. The mean Ka/Ks ratio of <0.5 in paralogs and orthologs indicates horizontal and vertical expansions of K+ channel genes under strong purifying selection. The one-to-one K+ channel orthologs were prominent among the closely related species, with higher synteny between maize and the rest of the monocots. Comprehensive K+ channels promoter analysis revealed various cis-regulatory elements mediating stress tolerance with the predominance of MYB and STRE binding sites. The regulatory network showed AP2-EREBP TFs, miR164 and miR399 are prominent regulatory elements of K+ channels. The qRT-PCR analysis of K+ channels and regulatory miRNAs showed significant expressions in response to drought and waterlogging stresses. The present study expanded the knowledge on K+ channels in maize and will serve as a basis for an in-depth functional analysis.
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Affiliation(s)
| | - Rakhi Tomar
- Division of Genetics, ICAR- Indian Agricultural Research Institute, New Delhi, 110012, India
| | | | - Sarika Sahu
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, 110012, India
| | - Dwijesh Chandra Mishra
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, 110012, India
| | - Atmakuri Ramakrishna Rao
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, 110012, India
| | - Viswanathan Chinnusamy
- Division of Plant Physiology, ICAR- Indian Agricultural Research Institute, New Delhi, 110012, India
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9
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Liu R, Huang S, Huang A, Chen M, Luo Y, Guo Z, Lu S. Overexpression of CdtCIPK21 from triploid bermudagrass reduces salt and drought tolerance but increases chilling tolerance in transgenic rice. JOURNAL OF PLANT PHYSIOLOGY 2023; 286:154006. [PMID: 37196413 DOI: 10.1016/j.jplph.2023.154006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/10/2023] [Accepted: 05/10/2023] [Indexed: 05/19/2023]
Abstract
Calcineurin B-like-interacting protein kinase (CIPK) is a serine/threonine kinase, which transmits the Ca2+ signal sensed by CBL proteins. A CdtCIPK21 showing highly identical to OsCIPK21 in rice was isolated from triploid bermudagrass (Cynodon dactylon × Cynodon transvaalensis). CdtCIPK21 transcript could be detected in roots, rhizomes, stems, stolons, and leaves, with highest level in roots. It was induced by salinity, dehydration and chilling, but reduced by ABA treatment. Transgenic rice plants overexpressing CdtCIPK21 had decreased salt and drought tolerance as well as ABA sensitivity but increased chilling tolerance. Lower SOD and CAT activities was observed in transgenic lines under salinity and drought stress conditions, but higher levels under chilling stress. Similarly, lower levels of proline concentration and P5CS1 and P5CS2 transcripts were maintained in transgenic lines under salinity and drought stresses, and higher levels were maintained under chilling. In addition, transgenic lines had lower transcript levels of ABA-independent genes (OsDREB1A, OsDREB1B, and OsDREB2A) and ABA responsive genes (OsLEA3, OsLIP9, and OsRAB16A) under salinity and drought but higher levels under chilling compared with WT. The results suggest that CdtCIPK21 regulates salt and drought tolerance negatively and chilling tolerance positively, which are associated with the altered ABA sensitivity, antioxidants, proline accumulation and expression of ABA-dependent and ABA-independent stress responsive genes.
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Affiliation(s)
- Rui Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Shilian Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Anyao Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Miao Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Yurong Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
| | - Zhenfei Guo
- College of Grassland Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Shaoyun Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangdong Engineering Research Center for Grassland Science, College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China.
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10
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Li S, Wang Y, Wang C, Zhang Y, Sun D, Zhou P, Tian C, Liu S. Cryo-EM structure reveals a symmetry reduction of the plant outward-rectifier potassium channel SKOR. Cell Discov 2023; 9:67. [PMID: 37391403 DOI: 10.1038/s41421-023-00572-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/30/2023] [Indexed: 07/02/2023] Open
Affiliation(s)
- Siyu Li
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
| | - Yuanxia Wang
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
| | - Chenyang Wang
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
| | - Yong Zhang
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
| | - Demeng Sun
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China
| | - Peng Zhou
- School of Life Science, Hefei Normal University, Hefei, Anhui, China.
| | - Changlin Tian
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China.
- The Anhui Provincial Key Laboratory of High Magnetic Resonance Image, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui, China.
| | - Sanling Liu
- Department of Endocrinology, Institute of Endocrine and Metabolic Diseases, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, Joint Center for Biological Analytical Chemistry, Anhui Engineering Laboratory of Peptide Drug, Anhui Laboratory of Advanced Photonic Science and Technology, University of Science and Technology of China, Hefei, Anhui, China.
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11
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Popova LG, Khramov DE, Nedelyaeva OI, Volkov VS. Yeast Heterologous Expression Systems for the Study of Plant Membrane Proteins. Int J Mol Sci 2023; 24:10768. [PMID: 37445944 DOI: 10.3390/ijms241310768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
Researchers are often interested in proteins that are present in cells in small ratios compared to the total amount of proteins. These proteins include transcription factors, hormones and specific membrane proteins. However, sufficient amounts of well-purified protein preparations are required for functional and structural studies of these proteins, including the creation of artificial proteoliposomes and the growth of protein 2D and 3D crystals. This aim can be achieved by the expression of the target protein in a heterologous system. This review describes the applications of yeast heterologous expression systems in studies of plant membrane proteins. An initial brief description introduces the widely used heterologous expression systems of the baker's yeast Saccharomyces cerevisiae and the methylotrophic yeast Pichia pastoris. S. cerevisiae is further considered a convenient model system for functional studies of heterologously expressed proteins, while P. pastoris has the advantage of using these yeast cells as factories for producing large quantities of proteins of interest. The application of both expression systems is described for functional and structural studies of membrane proteins from plants, namely, K+- and Na+-transporters, various ATPases and anion transporters, and other transport proteins.
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Affiliation(s)
- Larissa G Popova
- K.A. Timiryazev Institute of Plant Physiology RAS, 127276 Moscow, Russia
| | - Dmitrii E Khramov
- K.A. Timiryazev Institute of Plant Physiology RAS, 127276 Moscow, Russia
| | - Olga I Nedelyaeva
- K.A. Timiryazev Institute of Plant Physiology RAS, 127276 Moscow, Russia
| | - Vadim S Volkov
- K.A. Timiryazev Institute of Plant Physiology RAS, 127276 Moscow, Russia
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Nieves-Cordones M, Amo J, Hurtado-Navarro L, Martínez-Martínez A, Martínez V, Rubio F. Inhibition of SlSKOR by SlCIPK23-SlCBL1/9 uncovers CIPK-CBL-target network rewiring in land plants. THE NEW PHYTOLOGIST 2023; 238:2495-2511. [PMID: 36967582 DOI: 10.1111/nph.18910] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 03/19/2023] [Indexed: 05/19/2023]
Abstract
Transport of K+ to the xylem is a key process in the mineral nutrition of the shoots. Although CIPK-CBL complexes have been widely shown to regulate K+ uptake transport systems, no information is available about the xylem ones. Here, we studied the physiological roles of the voltage-gated K+ channel SlSKOR and its regulation by the SlCIPK23-SlCBL1/9 complexes in tomato plants. We phenotyped gene-edited slskor and slcipk23 tomato knockout mutants and carried out two-electrode voltage-clamp (TEVC) and BiFC assays in Xenopus oocytes as key approaches. SlSKOR was preferentially expressed in the root stele and was important not only for K+ transport to shoots but also, indirectly, for that of Ca2+ , Mg2+ , Na+ , NO3 - , and Cl- . Surprisingly, the SlCIPK23-SlCBL1/9 complexes turned out to be negative regulators of SlSKOR. Inhibition of SlSKOR by SlCIPK23-SlCBL1/9 was observed in Xenopus oocytes and tomato plants. Regulation of SKOR-like channels by CIPK23-CBL1 complexes was also present in Medicago, grapevine, and lettuce but not in Arabidopsis and saltwater cress. Our results provide a molecular framework for coordinating root K+ uptake and its translocation to the shoot by SlCIPK23-SlCBL1/9 in tomato plants. Moreover, they evidenced that CIPK-CBL-target networks have evolved differently in land plants.
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Affiliation(s)
- Manuel Nieves-Cordones
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
| | - Jesús Amo
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
| | - Laura Hurtado-Navarro
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
| | - Almudena Martínez-Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
| | - Vicente Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
| | - Francisco Rubio
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, 30100, Spain
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13
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Cui C, Feng L, Zhou C, Wan H, Zhou B. Transcriptome Revealed GhPP2C43-A Negatively Regulates Salinity Tolerance in an Introgression Line from a Semi-wild Upland Cotton. PLANT & CELL PHYSIOLOGY 2023:pcad036. [PMID: 37115634 DOI: 10.1093/pcp/pcad036] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 04/22/2023] [Accepted: 04/27/2023] [Indexed: 06/19/2023]
Abstract
Salt damage is one of the major threats to sustainable cotton production owing to the limited arable land in China mainly occupied by the production of staple food crops. Salt-stress tolerant cotton varieties are lacking in production and, the mechanisms underpinning salt-stress tolerance in cotton remain enigmatic. Here, DM37, an intraspecific introgression line from G. hirsutum race yucatanense acc TX-1046 into the G. hirsutum acc TM-1 background, was found to be highly tolerant to salt stress. Its seed germination rate and germination potential were significantly higher than the recipient TM-1 under salt stress. Physiological analysis showed DM37 had higher proline content and Peroxidase activity, as well as lower Na+/K+ ratios at the seedling stage, consistent with higher seedling survival rate after durable salt stress. Furthermore, comparative transcriptome analysis revealed that responsive patterns to salt stress in DM37 were different from TM-1. Weighted Correlation Network Analysis (WGCNA) demonstrated that co-expression modules associated with salt stress in DM37 also differed from TM-1. Out of them, GhPP2C43-A, a phosphatase gene, exhibited negative regulation of salt-stress tolerance verified by VIGS and transgenic Arabidopsis. Gene expression showed GhPP2C43-A in TM-1 was induced by durable salt stress but not in DM37 probably attributing to the variation of cis-element in its promoter, thereby being conferred different salt-stress tolerance. Our result would provide new genes/germplasms from semi-wild cotton in salt-stress tolerant cotton breeding. This study would give us new insights into the mechanisms underpinning the salt-stress tolerance in cotton.
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Affiliation(s)
- Changjiang Cui
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co-sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education), Nanjing Agricultural University, Nanjing 210095, China
| | - Liuchun Feng
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co-sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education), Nanjing Agricultural University, Nanjing 210095, China
| | - Chenhui Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co-sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education), Nanjing Agricultural University, Nanjing 210095, China
| | - Hui Wan
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co-sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education), Nanjing Agricultural University, Nanjing 210095, China
| | - Baoliang Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Collaborative Innovation Center for Modern Crop Production co-sponsored by Jiangsu Province and Ministry of Education, Cotton Germplasm Enhancement and Application Engineering Research Center (Ministry of Education), Nanjing Agricultural University, Nanjing 210095, China
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14
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De Rosa A, McGaughey S, Magrath I, Byrt C. Molecular membrane separation: plants inspire new technologies. THE NEW PHYTOLOGIST 2023; 238:33-54. [PMID: 36683439 DOI: 10.1111/nph.18762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 01/06/2023] [Indexed: 06/17/2023]
Abstract
Plants draw up their surrounding soil solution to gain water and nutrients required for growth, development and reproduction. Obtaining adequate water and nutrients involves taking up both desired and undesired elements from the soil solution and separating resources from waste. Desirable and undesirable elements in the soil solution can share similar chemical properties, such as size and charge. Plants use membrane separation mechanisms to distinguish between different molecules that have similar chemical properties. Membrane separation enables distribution or retention of resources and efflux or compartmentation of waste. Plants use specialised membrane separation mechanisms to adapt to challenging soil solution compositions and distinguish between resources and waste. Coordination and regulation of these mechanisms between different tissues, cell types and subcellular membranes supports plant nutrition, environmental stress tolerance and energy management. This review considers membrane separation mechanisms in plants that contribute to specialised separation processes and highlights mechanisms of interest for engineering plants with enhanced performance in challenging conditions and for inspiring the development of novel industrial membrane separation technologies. Knowledge gained from studying plant membrane separation mechanisms can be applied to developing precision separation technologies. Separation technologies are needed for harvesting resources from industrial wastes and transitioning to a circular green economy.
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Affiliation(s)
- Annamaria De Rosa
- Division of Plant Science, Research School of Biology, Australian National University, 2601, ACT, Acton, Australia
| | - Samantha McGaughey
- Division of Plant Science, Research School of Biology, Australian National University, 2601, ACT, Acton, Australia
| | - Isobel Magrath
- Division of Plant Science, Research School of Biology, Australian National University, 2601, ACT, Acton, Australia
| | - Caitlin Byrt
- Division of Plant Science, Research School of Biology, Australian National University, 2601, ACT, Acton, Australia
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Characterization of Dendrobium catenatum CBL-CIPK signaling networks and their response to abiotic stress. Int J Biol Macromol 2023; 236:124010. [PMID: 36918075 DOI: 10.1016/j.ijbiomac.2023.124010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/05/2023] [Accepted: 03/07/2023] [Indexed: 03/14/2023]
Abstract
Dendrobium catenatum is a traditional Chinese medicine listing as rare and endangered due to environmental impacts. But little is known about its stress resistance mechanism. The CBL-CIPK signaling pathway played vital roles in various stress responses. In this study, we identified 9 calcineurin B-like (CBL) genes and 28 CBL-interacting protein kinase (CIPK) genes from D. catenatum. Phylogenetic analysis showed that DcCBL and DcCIPK families could be divided into four and six subgroups, respectively. Members in each subgroup had similar gene structures. Cis-acting element analyses showed that these genes were involved in stress responses and hormone signaling. Spatial expression profiles showed that they were tissue-specific, and expressed lower in vegetative organs than reproductive organs. Gene expression analyses revealed that these genes were involved in drought, heat, cold, and salt responses and depended on abscisic acid (ABA) and salicylic acid (SA) signaling pathways. Furthermore, we cloned 19 DcCIPK genes and 9 DcCBL genes and detected ten interacting CBL-CIPK combinations using yeast two-hybrid system. Finally, we constructed 20 CBL-CIPK signaling pathways based on their expression patterns and interaction relationships. These results established CBL-CIPK signaling pathway responding to abiotic stress and provided a molecular basis for improving D. catenatum stress resistance in the future.
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Li X, Liu L, Sun S, Li Y, Jia L, Ye S, Yu Y, Dossa K, Luan Y. Transcriptome analysis reveals the key pathways and candidate genes involved in salt stress responses in Cymbidium ensifolium leaves. BMC PLANT BIOLOGY 2023; 23:64. [PMID: 36721093 PMCID: PMC9890885 DOI: 10.1186/s12870-023-04050-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 01/06/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Cymbidium ensifolium L. is known for its ornamental value and is frequently used in cosmetics. Information about the salt stress response of C. ensifolium is scarce. In this study, we reported the physiological and transcriptomic responses of C. ensifolium leaves under the influence of 100 mM NaCl stress for 48 (T48) and 96 (T96) hours. RESULTS Leaf Na+ content, activities of the antioxidant enzymes i.e., superoxide dismutase, glutathione S-transferase, and ascorbate peroxidase, and malondialdehyde content were increased in salt-stressed leaves of C. ensifolium. Transcriptome analysis revealed that a relatively high number of genes were differentially expressed in CKvsT48 (17,249) compared to CKvsT96 (5,376). Several genes related to salt stress sensing (calcium signaling, stomata closure, cell-wall remodeling, and ROS scavenging), ion balance (Na+ and H+), ion homeostasis (Na+/K+ ratios), and phytohormone signaling (abscisic acid and brassinosteroid) were differentially expressed in CKvsT48, CKvsT96, and T48vsT96. In general, the expression of genes enriched in these pathways was increased in T48 compared to CK while reduced in T96 compared to T48. Transcription factors (TFs) belonging to more than 70 families were differentially expressed; the major families of differentially expressed TFs included bHLH, NAC, MYB, WRKY, MYB-related, and C3H. A Myb-like gene (CenREV3) was further characterized by overexpressing it in Arabidopsis thaliana. CenREV3's expression was decreased with the prolongation of salt stress. As a result, the CenREV3-overexpression lines showed reduced root length, germination %, and survival % suggesting that this TF is a negative regulator of salt stress tolerance. CONCLUSION These results provide the basis for future studies to explore the salt stress response-related pathways in C. ensifolium.
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Affiliation(s)
- Xiang Li
- The First Affiliated Hospital of Yunnan University of Traditional Chinese Medicine, 650021, Kunming, China
| | - Lanlan Liu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, 650224, Kunming, China
| | - Shixian Sun
- Yunnan Key Laboratory of Plateau Wetland Conservation, Restoration and Ecological Services, Southwest Forestry University, 650224, Kunming, China
| | - Yanmei Li
- Department of Life Technology Teaching and Research, School of Life Science, Southwest Forestry University, 650224, Kunming, China
| | - Lu Jia
- Department of Life Technology Teaching and Research, School of Life Science, Southwest Forestry University, 650224, Kunming, China
| | - Shili Ye
- Faculty of Mathematics and Physics, Southwest Forestry University, 650224, Kunming, China
| | - Yanxuan Yu
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, 650224, Kunming, China
| | - Komivi Dossa
- CIRAD, UMR AGAP Institute, F-34398, Montpellier, France
| | - Yunpeng Luan
- The First Affiliated Hospital of Yunnan University of Traditional Chinese Medicine, 650021, Kunming, China.
- Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, 650224, Kunming, China.
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17
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Li KL, Tang RJ, Wang C, Luan S. Potassium nutrient status drives posttranslational regulation of a low-K response network in Arabidopsis. Nat Commun 2023; 14:360. [PMID: 36690625 PMCID: PMC9870859 DOI: 10.1038/s41467-023-35906-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 01/06/2023] [Indexed: 01/24/2023] Open
Abstract
Under low-potassium (K+) stress, a Ca2+ signaling network consisting of calcineurin B-like proteins (CBLs) and CBL-interacting kinases (CIPKs) play essential roles. Specifically, the plasma membrane CBL1/9-CIPK pathway and the tonoplast CBL2/3-CIPK pathway promotes K+ uptake and remobilization, respectively, by activating a series of K+ channels. While the dual CBL-CIPK pathways enable plants to cope with low-K+ stress, little is known about the early events that link external K+ levels to the CBL-CIPK proteins. Here we show that K+ status regulates the protein abundance and phosphorylation of the CBL-CIPK-channel modules. Further analysis revealed low K+-induced activation of VM-CBL2/3 happened earlier and was required for full activation of PM-CBL1/9 pathway. Moreover, we identified CIPK9/23 kinases to be responsible for phosphorylation of CBL1/9/2/3 in plant response to low-K+ stress and the HAB1/ABI1/ABI2/PP2CA phosphatases to be responsible for CBL2/3-CIPK9 dephosphorylation upon K+-repletion. Further genetic analysis showed that HAB1/ABI1/ABI2/PP2CA phosphatases are negative regulators for plant growth under low-K+, countering the CBL-CIPK network in plant response and adaptation to low-K+ stress.
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Affiliation(s)
- Kun-Lun Li
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - Ren-Jie Tang
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - Chao Wang
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA
| | - Sheng Luan
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA.
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Saini LK, Bheri M, Pandey GK. Protein phosphatases and their targets: Comprehending the interactions in plant signaling pathways. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 134:307-370. [PMID: 36858740 DOI: 10.1016/bs.apcsb.2022.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Protein phosphorylation is a vital reversible post-translational modification. This process is established by two classes of enzymes: protein kinases and protein phosphatases. Protein kinases phosphorylate proteins while protein phosphatases dephosphorylate phosphorylated proteins, thus, functioning as 'critical regulators' in signaling pathways. The eukaryotic protein phosphatases are classified as phosphoprotein phosphatases (PPP), metallo-dependent protein phosphatases (PPM), protein tyrosine (Tyr) phosphatases (PTP), and aspartate (Asp)-dependent phosphatases. The PPP and PPM families are serine (Ser)/threonine (Thr) specific phosphatases (STPs) that dephosphorylate Ser and Thr residues. The PTP family dephosphorylates Tyr residues while dual-specificity phosphatases (DsPTPs/DSPs) dephosphorylate Ser, Thr, and Tyr residues. The composition of these enzymes as well as their substrate specificity are important determinants of their functional significance in a number of cellular processes and stress responses. Their role in animal systems is well-understood and characterized. The functional characterization of protein phosphatases has been extensively covered in plants, although the comprehension of their mechanistic basis is an ongoing pursuit. The nature of their interactions with other key players in the signaling process is vital to our understanding. The substrates or targets determine their potential as well as magnitude of the impact they have on signaling pathways. In this article, we exclusively overview the various substrates of protein phosphatases in plant signaling pathways, which are a critical determinant of the outcome of various developmental and stress stimuli.
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Affiliation(s)
- Lokesh K Saini
- Department of Plant Molecular Biology, University of Delhi South Campus, Dhaula Kuan, New Delhi, India
| | - Malathi Bheri
- Department of Plant Molecular Biology, University of Delhi South Campus, Dhaula Kuan, New Delhi, India
| | - Girdhar K Pandey
- Department of Plant Molecular Biology, University of Delhi South Campus, Dhaula Kuan, New Delhi, India.
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Calcium decoders and their targets: The holy alliance that regulate cellular responses in stress signaling. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 134:371-439. [PMID: 36858741 DOI: 10.1016/bs.apcsb.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Calcium (Ca2+) signaling is versatile communication network in the cell. Stimuli perceived by cells are transposed through Ca2+-signature, and are decoded by plethora of Ca2+ sensors present in the cell. Calmodulin, calmodulin-like proteins, Ca2+-dependent protein kinases and calcineurin B-like proteins are major classes of proteins that decode the Ca2+ signature and serve in the propagation of signals to different parts of cells by targeting downstream proteins. These decoders and their targets work together to elicit responses against diverse stress stimuli. Over a period of time, significant attempts have been made to characterize as well as summarize elements of this signaling machinery. We begin with a structural overview and amalgamate the newly identified Ca2+ sensor protein in plants. Their ability to bind Ca2+, undergo conformational changes, and how it facilitates binding to a wide variety of targets is further embedded. Subsequently, we summarize the recent progress made on the functional characterization of Ca2+ sensing machinery and in particular their target proteins in stress signaling. We have focused on the physiological role of Ca2+, the Ca2+ sensing machinery, and the mode of regulation on their target proteins during plant stress adaptation. Additionally, we also discuss the role of these decoders and their mode of regulation on the target proteins during abiotic, hormone signaling and biotic stress responses in plants. Finally, here, we have enumerated the limitations and challenges in the Ca2+ signaling. This article will greatly enable in understanding the current picture of plant response and adaptation during diverse stimuli through the lens of Ca2+ signaling.
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Chen X, Luo M, Mo C, Li W, Ji Y, Xie Q, Jiang X. MeCIPK10 regulates the transition of the K + transport activity of MeAKT2 between low- and high-affinity molds in cassava. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153861. [PMID: 36399835 DOI: 10.1016/j.jplph.2022.153861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/04/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
AKT1 is an inward-rectifying K+ channel that was originally thought to function only within a low-affinity K+ concentration range. However, the growth of an akt1 mutant of Arabidopsis was shown to be severely inhibited within a high-affinity range. This suggested that AKT1 may also be a high-affinity K+ transporter, but it remains unclear how the two modes of AKT1 coordinate to uptake K+. One gene (MeAKT2) encodes for a putatively inward-rectifying K+ channel and was isolated from cassava. Relative to other tissues, the MeAKT2 gene was expressed mainly in roots, and its transcriptional level was observed to be significantly increased under low-K+ conditions. Functional analyses were performed using a yeast expression system. When MeAKT2 was expressed alone in yeast cells, transgenic yeast could grow only in nutrient media supplied with >0.5 mM potassium. A yeast two-hybrid assay showed that both MeCIPK10 and MeCIPK12 clearly interacted with MeAKT2. Additionally, 0.05 mM K+ was sufficient for the growth of yeast cells co-expressing MeAKT2 with MeCIPK10, but also their co-expression significantly enhanced the growth capacity of yeast cells in the low range of K+ concentrations. Change in K+ uptake rate in co-transgenic yeast cells grown across a wide range of K+ concentrations showed that MeAKT2-mediated K+ uptake displayed a biphasic pattern, but also the switching from low-to high-affinity K+ uptake was regulated by CIPK10. This indicated that MeAKT2 functioned as a dual-affinity transporter to uptake K+ under both low- and high-affinity K+ conditions.
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Affiliation(s)
- Xiuzhen Chen
- National Center for Technology Innovation of Saline-Alkali Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Crops, Hainan University, Haikou, 570228, China; Lixia District Center for Disease Control and Prevention, Jinan, 250014, China
| | - Minghua Luo
- National Center for Technology Innovation of Saline-Alkali Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Chunyan Mo
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Wenjia Li
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Yiying Ji
- National Center for Technology Innovation of Saline-Alkali Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Qing Xie
- National Center for Technology Innovation of Saline-Alkali Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China.
| | - Xingyu Jiang
- National Center for Technology Innovation of Saline-Alkali Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/Institute of Tropical Crops, Hainan University, Haikou, 570228, China.
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Yamanashi T, Uchiyama T, Saito S, Higashi T, Ikeda H, Kikunaga H, Yamagami M, Ishimaru Y, Uozumi N. Potassium transporter KUP9 participates in K + distribution in roots and leaves under low K + stress. STRESS BIOLOGY 2022; 2:52. [PMID: 37676337 PMCID: PMC10441886 DOI: 10.1007/s44154-022-00074-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 11/09/2022] [Indexed: 09/08/2023]
Abstract
Potassium (K) is a major essential element in plant cells, and KUP/HAK/KT-type K+ transporters participate in the absorption of K+ into roots and in the long-distance transport to above-ground parts. In Arabidopsis thaliana, KUP9 is involved in the transport of K+ and Cs+ in roots. In this study, we investigated KUP9 function in relation to the K+ status of the plant. The expression of KUP9 was upregulated in older leaves on K+-depleted medium, compared to the expression of the other 12 KUP genes in the KUP/HAK/KT family in Arabidopsis. When grown on low K+ medium, the kup9 mutant had reduced chlorophyll content in seedlings and chlorosis in older rosette leaves. Tissue-specific expression of KUP9 determined by KUP9 promoter:GUS assay depended on the K+ status of the plants: In K+ sufficient medium, KUP9 was expressed in the leaf blade towards the leaf tip, whereas in K+ depleted medium expression was mainly found in the petioles. In accordance with this, K+ accumulated in the roots of kup9 plants. The short-term 43K+ tracer measurement showed that 43K was transferred at a lower rate in roots and shoots of kup9, compared to the wild type. These data show that KUP9 participates in the distribution of K+ in leaves and K+ absorption in roots under low K+ conditions.
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Affiliation(s)
- Taro Yamanashi
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Takeshi Uchiyama
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Shunya Saito
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Taiki Higashi
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Hayato Ikeda
- Research Center for Electron Photon Science, Tohoku University, Sendai, 980-0826, Japan
- Cyclotron and Radioisotope Center, Tohoku University, Sendai, 980-8578, Japan
| | - Hidetoshi Kikunaga
- Research Center for Electron Photon Science, Tohoku University, Sendai, 980-0826, Japan
| | - Mutsumi Yamagami
- Institute for Environmental Sciences, Rokkasho, Kamikita, Aomori, 039-3212, Japan
| | - Yasuhiro Ishimaru
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Nobuyuki Uozumi
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan.
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Does Potassium (K +) Contribute to High-Nitrate (NO 3-) Weakening of a Plant's Defense System against Necrotrophic Fungi? Int J Mol Sci 2022; 23:ijms232415631. [PMID: 36555267 PMCID: PMC9778958 DOI: 10.3390/ijms232415631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
In this opinion article, we have analyzed the relevancy of a hypothesis which is based on the idea that in Arabidopsis thaliana jasmonic acid, a (JA)-mediated defense system against necrotrophic fungi is weakened when NO3- supply is high. Such a hypothesis is based on the fact that when NO3- supply is high, it induces an increase in the amount of bioactive ABA which induces the sequestration of the phosphatase ABI2 (PP2C) into the PYR/PYL/RCAR receptor. Consequently, the Ca sensors CBL1/9-CIPK23 are not dephosphorylated by ABI2, thus remaining able to phosphorylate targets such as AtNPF6.3 and AtKAT1, which are NO3- and K+ transporters, respectively. Therefore, the impact of phosphorylation on the regulation of these two transporters, could (1) reduce NO3- influx as in its phosphorylated state AtNPF6.3 shifts to low capacity state and (2) increase K+ influx, as in its phosphorylated state KAT1 becomes more active. It is also well known that in roots, K+ loading in the xylem and its transport to the shoot is activated in the presence of NO3-. As such, the enrichment of plant tissues in K+ can impair a jasmonic acid (JA) regulatory pathway and the induction of the corresponding biomarkers. The latter are known to be up-regulated under K+ deficiency and inhibited when K+ is resupplied. We therefore suggest that increased K+ uptake and tissue content induced by high NO3- supply modifies the JA regulatory pathway, resulting in a weakened JA-mediated plant's defense system against necrotrophic fungi.
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Pérez‐Alonso M, Guerrero‐Galán C, González Ortega‐Villaizán A, Ortiz‐García P, Scholz SS, Ramos P, Sakakibara H, Kiba T, Ludwig‐Müller J, Krapp A, Oelmüller R, Vicente‐Carbajosa J, Pollmann S. The calcium sensor CBL7 is required for Serendipita indica-induced growth stimulation in Arabidopsis thaliana, controlling defense against the endophyte and K + homoeostasis in the symbiosis. PLANT, CELL & ENVIRONMENT 2022; 45:3367-3382. [PMID: 35984078 PMCID: PMC9804297 DOI: 10.1111/pce.14420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 08/02/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023]
Abstract
Calcium is an important second messenger in plants. The activation of Ca2+ signalling cascades is critical in the activation of adaptive processes in response to environmental stimuli. Root colonization by the growth promoting endophyte Serendipita indica involves the increase of cytosolic Ca2+ levels in Arabidopsis thaliana. Here, we investigated transcriptional changes in Arabidopsis roots during symbiosis with S. indica. RNA-seq profiling disclosed the induction of Calcineurin B-like 7 (CBL7) during early and later phases of the interaction. Consistently, reverse genetic evidence highlighted the functional relevance of CBL7 and tested the involvement of a CBL7-CBL-interacting protein kinase 13 signalling pathway. The loss-of-function of CBL7 abolished the growth promoting effect and affected root colonization. The transcriptomics analysis of cbl7 revealed the involvement of this Ca2+ sensor in activating plant defense responses. Furthermore, we report on the contribution of CBL7 to potassium transport in Arabidopsis. We analysed K+ contents in wild-type and cbl7 plants and observed a significant increase of K+ in roots of cbl7 plants, while shoot tissues demonstrated K+ depletion. Taken together, our work associates CBL7 with an important role in the mutual interaction between Arabidopsis and S. indica and links CBL7 to K+ transport.
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Affiliation(s)
- Marta‐Marina Pérez‐Alonso
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
- Umeå Plant Science CenterUmeå UniversityUmeåSweden
| | - Carmen Guerrero‐Galán
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
| | - Adrián González Ortega‐Villaizán
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
| | - Paloma Ortiz‐García
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
| | - Sandra S. Scholz
- Department of Plant Physiology, Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular BotanyFriedrich‐Schiller‐University JenaJenaGermany
| | - Patricio Ramos
- Centro de Investigación de Estudios Avanzados del MauleUniversidad Católica del MauleTalcaChile
| | - Hitoshi Sakakibara
- RIKEN Center for Sustainable Resource ScienceTsurumiYokohamaJapan
- Department of Applied Biosciences, Graduate School of Bioagricultural SciencesNagoya UniversityNagoyaJapan
| | - Takatoshi Kiba
- RIKEN Center for Sustainable Resource ScienceTsurumiYokohamaJapan
- Department of Applied Biosciences, Graduate School of Bioagricultural SciencesNagoya UniversityNagoyaJapan
| | | | - Anne Krapp
- Université Paris‐Saclay, INRAE, AgroParisTechInstitut Jean‐Pierre BourginVersaillesFrance
| | - Ralf Oelmüller
- Department of Plant Physiology, Matthias Schleiden Institute of Genetics, Bioinformatics and Molecular BotanyFriedrich‐Schiller‐University JenaJenaGermany
| | - Jesús Vicente‐Carbajosa
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
- Departamento de Biotecnología‐Biología Vegetal, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de BiosistemasUniversidad Politécnica de Madrid (UPM)MadridSpain
| | - Stephan Pollmann
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM)–Instituto Nacional de Investigación y Tecnología Agraria y Alimentación (INIA/CSIC)Campus de MontegancedoPozuelo de Alarcón (Madrid)Spain
- Departamento de Biotecnología‐Biología Vegetal, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de BiosistemasUniversidad Politécnica de Madrid (UPM)MadridSpain
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Dickinson MS, Pourmal S, Gupta M, Bi M, Stroud RM. Symmetry Reduction in a Hyperpolarization-Activated Homotetrameric Ion Channel. Biochemistry 2022; 61:2177-2181. [PMID: 34964607 PMCID: PMC9931035 DOI: 10.1021/acs.biochem.1c00654] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Plants obtain nutrients from the soil via transmembrane transporters and channels in their root hairs, from which ions radially transport in toward the xylem for distribution across the plant body. We determined structures of the hyperpolarization-activated channel AKT1 from Arabidopsis thaliana, which mediates K+ uptake from the soil into plant roots. These structures of AtAKT1 embedded in lipid nanodiscs show that the channel undergoes a reduction of C4 to C2 symmetry, possibly to regulate its electrical activation.
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Affiliation(s)
- Miles Sasha Dickinson
- Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
- Chemistry and Chemical Biology Graduate Program, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States
| | - Sergei Pourmal
- Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
- Chemistry and Chemical Biology Graduate Program, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States
| | - Meghna Gupta
- Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
| | - Maxine Bi
- Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
- Graduate Group in Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States
| | - Robert M Stroud
- Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
- Chemistry and Chemical Biology Graduate Program, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States
- Graduate Group in Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States
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25
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Ganz P, Porras-Murillo R, Ijato T, Menz J, Straub T, Stührwohldt N, Moradtalab N, Ludewig U, Neuhäuser B. Abscisic acid influences ammonium transport via regulation of kinase CIPK23 and ammonium transporters. PLANT PHYSIOLOGY 2022; 190:1275-1288. [PMID: 35762968 PMCID: PMC9516733 DOI: 10.1093/plphys/kiac315] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 06/10/2022] [Indexed: 06/12/2023]
Abstract
Ammonium uptake at plant roots is regulated at the transcriptional, posttranscriptional, and posttranslational levels. Phosphorylation by the protein kinase calcineurin B-like protein (CBL)-interacting protein kinase 23 (CIPK23) transiently inactivates ammonium transporters (AMT1s), but the phosphatases activating AMT1s remain unknown. Here, we identified the PP2C phosphatase abscisic acid (ABA) insensitive 1 (ABI1) as an activator of AMT1s in Arabidopsis (Arabidopsis thaliana). We showed that high external ammonium concentrations elevate the level of the stress phytohormone ABA, possibly by de-glycosylation. Active ABA was sensed by ABI1-PYR1-like () complexes followed by the inactivation of ABI1, in turn activating CIPK23. Under favorable growth conditions, ABI1 reduced AMT1;1 and AMT1;2 phosphorylation, both by binding and inactivating CIPK23. ABI1 further directly interacted with AMT1;1 and AMT1;2, which would be a prerequisite for dephosphorylation of the transporter by ABI1. Thus, ABI1 is a positive regulator of ammonium uptake, coupling nutrient acquisition to abiotic stress signaling. Elevated ABA reduces ammonium uptake during stress situations, such as ammonium toxicity, whereas ABI1 reactivates AMT1s under favorable growth conditions.
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Affiliation(s)
- Pascal Ganz
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Romano Porras-Murillo
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Toyosi Ijato
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Jochen Menz
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Tatsiana Straub
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Nils Stührwohldt
- Institute of Biology, Plant Physiology and Biochemistry, University of Hohenheim, Stuttgart D-70593, Germany
| | - Narges Moradtalab
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
| | - Uwe Ludewig
- Institute of Crop Science, Nutritional Crop Physiology, University of Hohenheim, Stuttgart D-70593, Germany
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26
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Structural basis for the activity regulation of a potassium channel AKT1 from Arabidopsis. Nat Commun 2022; 13:5682. [PMID: 36167696 PMCID: PMC9515098 DOI: 10.1038/s41467-022-33420-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 09/16/2022] [Indexed: 11/25/2022] Open
Abstract
The voltage-gated potassium channel AKT1 is responsible for primary K+ uptake in Arabidopsis roots. AKT1 is functionally activated through phosphorylation and negatively regulated by a potassium channel α-subunit AtKC1. However, the molecular basis for the modulation mechanism remains unclear. Here we report the structures of AKT1, phosphorylated-AKT1, a constitutively-active variant, and AKT1-AtKC1 complex. AKT1 is assembled in 2-fold symmetry at the cytoplasmic domain. Such organization appears to sterically hinder the reorientation of C-linkers during ion permeation. Phosphorylated-AKT1 adopts an alternate 4-fold symmetric conformation at cytoplasmic domain, which indicates conformational changes associated with symmetry switch during channel activation. To corroborate this finding, we perform structure-guided mutagenesis to disrupt the dimeric interface and identify a constitutively-active variant Asp379Ala mediates K+ permeation independently of phosphorylation. This variant predominantly adopts a 4-fold symmetric conformation. Furthermore, the AKT1-AtKC1 complex assembles in 2-fold symmetry. Together, our work reveals structural insight into the regulatory mechanism for AKT1. Arabidopsis thaliana potassium channel AKT1 is responsible for primary K + uptake from soil, which is functionally activated through phosphorylation and negatively regulated by an α-subunit AtKC1. Here, the authors report the structures of AKT1 at different states, revealing a 2- fold to 4-fold symmetry switch at cytoplasmic domain associated with AKT1 activity regulation.
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27
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Heyduk K. Evolution of Crassulacean acid metabolism in response to the environment: past, present, and future. PLANT PHYSIOLOGY 2022; 190:19-30. [PMID: 35748752 PMCID: PMC9434201 DOI: 10.1093/plphys/kiac303] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
Crassulacean acid metabolism (CAM) is a mode of photosynthesis that evolved in response to decreasing CO2 levels in the atmosphere some 20 million years ago. An elevated ratio of O2 relative to CO2 caused many plants to face increasing stress from photorespiration, a process exacerbated for plants living under high temperatures or in water-limited environments. Today, our climate is again rapidly changing and plants' ability to cope with and adapt to these novel environments is critical for their success. This review focuses on CAM plant responses to abiotic stressors likely to dominate in our changing climate: increasing CO2 levels, increasing temperatures, and greater variability in drought. Empirical studies that have assessed CAM responses are reviewed, though notably these are concentrated in relatively few CAM lineages. Other aspects of CAM biology, including the effects of abiotic stress on the light reactions and the role of leaf succulence, are also considered in the context of climate change. Finally, more recent studies using genomic techniques are discussed to link physiological changes in CAM plants with the underlying molecular mechanism. Together, the body of work reviewed suggests that CAM plants will continue to thrive in certain environments under elevated CO2. However, how CO2 interacts with other environmental factors, how those interactions affect CAM plants, and whether all CAM plants will be equally affected remain outstanding questions regarding the evolution of CAM on a changing planet.
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28
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Zhang B, Guo Y, Wang H, Wang X, Lv M, Yang P, Zhang L. Identification and Characterization of Shaker K + Channel Gene Family in Foxtail Millet ( Setaria italica) and Their Role in Stress Response. FRONTIERS IN PLANT SCIENCE 2022; 13:907635. [PMID: 35755660 PMCID: PMC9218596 DOI: 10.3389/fpls.2022.907635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
Potassium (K+) is one of the indispensable elements in plant growth and development. The Shaker K+ channel protein family is involved in plant K+ uptake and distribution. Foxtail millet (Setaria italica), as an important crop, has strong tolerance and adaptability to abiotic stresses. However, no systematic study focused on the Shaker K+ channel family in foxtail millet. Here, ten Shaker K+ channel genes in foxtail millet were identified and divided into five groups through phylogenetic analysis. Gene structures, chromosome locations, cis-acting regulatory elements in promoter, and post-translation modification sites of Shaker K+ channels were analyzed. In silico analysis of transcript level demonstrated that the expression of Shaker K+ channel genes was tissue or developmental stage specific. The transcription levels of Shaker K+ channel genes in foxtail millet under different abiotic stresses (cold, heat, NaCl, and PEG) and phytohormones (6-BA, BR, MJ, IAA, NAA, GA3, SA, and ABA) treatments at 0, 12, and 24 h were detected by qRT-PCR. The results showed that SiAKT1, SiKAT3, SiGORK, and SiSKOR were worth further research due to their significant responses after most treatments. The yeast complementation assay verified the inward K+ transport activities of detectable Shaker K+ channels. Finally, we found interactions between SiKAT2 and SiSNARE proteins. Compared to research in Arabidopsis, our results showed a difference in SYP121 related Shaker K+ channel regulation mechanism in foxtail millet. Our results indicate that Shaker K+ channels play important roles in foxtail millet and provide theoretical support for further exploring the K+ absorption mechanism of foxtail millet under abiotic stress.
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Affiliation(s)
- Ben Zhang
- State Key Laboratory of Sustainable Dryland Agriculture, Shanxi Agricultural University, Taiyuan, China
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Yue Guo
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Hui Wang
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Xiaoxia Wang
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Mengtao Lv
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Pu Yang
- School of Life Sciences, Shanxi University, Taiyuan, China
| | - Lizhen Zhang
- School of Life Sciences, Shanxi University, Taiyuan, China
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29
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Tian Y, Zeng H, Wu J, Huang J, Gao Q, Tang D, Cai L, Liao Z, Wang Y, Liu X, Lin J. Screening DHHCs of S-acylated proteins using an OsDHHC cDNA library and bimolecular fluorescence complementation in rice. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 110:1763-1780. [PMID: 35411551 DOI: 10.1111/tpj.15769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/30/2022] [Accepted: 04/07/2022] [Indexed: 05/28/2023]
Abstract
S-acylation is an important lipid modification that primarily involves DHHC proteins (DHHCs) and associated S-acylated proteins. No DHHC-S-acylated protein pair has been reported so far in rice (Oryza sativa L.) and the molecular mechanisms underlying S-acylation in plants are largely unknown. We constructed an OsDHHC cDNA library for screening corresponding pairs of DHHCs and S-acylated proteins using bimolecular fluorescence complementation assays. Five DHHC-S-acylated protein pairs (OsDHHC30-OsCBL2, OsDHHC30-OsCBL3, OsDHHC18-OsNOA1, OsDHHC13-OsNAC9, and OsDHHC14-GSD1) were identified in rice. Among the pairs, OsCBL2 and OsCBL3 were S-acylated by OsDHHC30 in yeast and rice. The localization of OsCBL2 and OsCBL3 in the endomembrane depended on S-acylation mediated by OsDHHC30. Meanwhile, all four OsDHHCs screened complemented the thermosensitive phenotype of an akr1 yeast mutant, and their DHHC motifs were required for S-acyltransferase activity. Overexpression of OsDHHC30 in rice plants improved their salt and oxidative tolerance. Together, these results contribute to our understanding of the molecular mechanism underlying S-acylation in plants.
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Affiliation(s)
- Ye Tian
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Hui Zeng
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Jicai Wu
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Jian Huang
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Qiang Gao
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Dongying Tang
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Lipeng Cai
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Zhaoyi Liao
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Yan Wang
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Xuanming Liu
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
| | - Jianzhong Lin
- Hunan Province Key Laboratory of Plant Functional Genomics and Developmental Regulation, State Key Laboratory of Chemo/Biosensing and Chemometrics, National Center of Technology Innovation for Saline-Alkali Tolerant Rice, College of Biology, Hunan University, Changsha, 410082, Hunan, China
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30
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Ankit A, Kamali S, Singh A. Genomic & structural diversity and functional role of potassium (K +) transport proteins in plants. Int J Biol Macromol 2022; 208:844-857. [PMID: 35367275 DOI: 10.1016/j.ijbiomac.2022.03.179] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 03/11/2022] [Accepted: 03/25/2022] [Indexed: 01/03/2023]
Abstract
Potassium (K+) is an essential macronutrient for plant growth and productivity. It is the most abundant cation in plants and is involved in various cellular processes. Variable K+ availability is sensed by plant roots, consequently K+ transport proteins are activated to optimize K+ uptake. In addition to K+ uptake and translocation these proteins are involved in other important physiological processes like transmembrane voltage regulation, polar auxin transport, maintenance of Na+/K+ ratio and stomata movement during abiotic stress responses. K+ transport proteins display tremendous genomic and structural diversity in plants. Their key structural features, such as transmembrane domains, N-terminal domains, C-terminal domains and loops determine their ability of K+ uptake and transport and thus, provide functional diversity. Most K+ transporters are regulated at transcriptional and post-translational levels. Genetic manipulation of key K+ transporters/channels could be a prominent strategy for improving K+ utilization efficiency (KUE) in plants. This review discusses the genomic and structural diversity of various K+ transport proteins in plants. Also, an update on the function of K+ transport proteins and their regulatory mechanism in response to variable K+ availability, in improving KUE, biotic and abiotic stresses is provided.
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Affiliation(s)
- Ankit Ankit
- National Institute of Plant Genome Research, New Delhi 110067, India
| | | | - Amarjeet Singh
- National Institute of Plant Genome Research, New Delhi 110067, India.
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Xie Q, Zhou Y, Jiang X. Structure, Function, and Regulation of the Plasma Membrane Na +/H + Antiporter Salt Overly Sensitive 1 in Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:866265. [PMID: 35432437 PMCID: PMC9009148 DOI: 10.3389/fpls.2022.866265] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 03/08/2022] [Indexed: 05/24/2023]
Abstract
Physiological studies have confirmed that export of Na+ to improve salt tolerance in plants is regulated by the combined activities of a complex transport system. In the Na+ transport system, the Na+/H+ antiporter salt overly sensitive 1 (SOS1) is the main protein that functions to excrete Na+ out of plant cells. In this paper, we review the structure and function of the Na+/H+ antiporter and the physiological process of Na+ transport in SOS signaling pathway, and discuss the regulation of SOS1 during phosphorylation activation by protein kinase and the balance mechanism of inhibiting SOS1 antiporter at molecular and protein levels. In addition, we carried out phylogenetic tree analysis of SOS1 proteins reported so far in plants, which implied the specificity of salt tolerance mechanism from model plants to higher crops under salt stress. Finally, the high complexity of the regulatory network of adaptation to salt tolerance, and the feasibility of coping strategies in the process of genetic improvement of salt tolerance quality of higher crops were reviewed.
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Affiliation(s)
- Qing Xie
- National Innovation Center for Technology of Saline-Alkaline Tolerant Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, China
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/School of Horticulture, Hainan University, Haikou, China
| | - Yang Zhou
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/School of Horticulture, Hainan University, Haikou, China
| | - Xingyu Jiang
- National Innovation Center for Technology of Saline-Alkaline Tolerant Rice/College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, China
- Hainan Key Laboratory for Biotechnology of Salt Tolerant Crops/School of Horticulture, Hainan University, Haikou, China
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Xiao X, Mo C, Sui J, Lin X, Long X, Qin Y, Fang Y, Tang C. The Calcium Sensor Calcineurin B-Like Proteins -Calcineurin B-Like Interacting Protein Kinases Is Involved in Leaf Development and Stress Responses Related to Latex Flow in Hevea brasiliensis. FRONTIERS IN PLANT SCIENCE 2022; 13:743506. [PMID: 35283911 PMCID: PMC8914471 DOI: 10.3389/fpls.2022.743506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Latex flow in Hevea brasiliensis (the Para rubber tree), the sole commercial source of natural rubber (cis-1,4-polyisoprene, NR), renders it uniquely suited for the study of plant stress responses. Calcineurin B-like interacting protein kinases (CIPK) serving as calcium-sensor protein kinases react with calcineurin B-like proteins (CBL) to play crucial roles in hormone signaling transduction and response to abiotic stress in plant developmental processes. However, little is known about their functions in Hevea. In this study, a total of twelve CBL (HbCBL) and thirty CIPK (HbCIPK) genes were identified from the Hevea genome. Structure and phylogenetic analysis assigned these CIPKs to five groups and CBLs to four groups, and mapped onto fourteen of the eighteen Hevea chromosomes. RNA-seq and qPCR analysis showed that the expressions of HbCBL and HbCIPK genes varied in the seven Hevea tissues examined, i.e., latex (cytoplasm of rubber-producing laticifers), bark, leaf, root, seed, female flower, and male flower. The expressions of two HbCBL and sixteen HbCIPK genes showed upward trends during leaf development. Following ethylene yield stimulation and the latex tapping treatment, both practices invoking stress, the expression levels of most latex-expressed genes were significantly altered. Yeast two-hybrid test revealed interactions for multiple combinations of HbCBLs and HbCIPKs with substantial gene expression in latex or other Hevea tissues. However, all the HbCBL-HbCIPK complexes examined did not recruit HbSOS1 or AtSOS1 to form functional salt tolerance SOS pathway in yeast cells. Taken together, the results suggested a role of the Hevea CBL-CIPK network as a point of convergence for several different signaling pathways in growth, development, and stress responses in relation to latex production.
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Affiliation(s)
- Xiaohu Xiao
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Chunyan Mo
- College of Tropical Crops, Hainan University, Haikou, China
- Natural Rubber Cooperative Innovation Center of Hainan Province and Ministry of Education of PRC, Haikou, China
| | - Jinlei Sui
- Public Research Laboratory, Hainan Medical University, Haikou, China
| | - Xianzu Lin
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
- College of Tropical Crops, Hainan University, Haikou, China
| | - Xiangyu Long
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Yunxia Qin
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Yongjun Fang
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Chaorong Tang
- College of Tropical Crops, Hainan University, Haikou, China
- Natural Rubber Cooperative Innovation Center of Hainan Province and Ministry of Education of PRC, Haikou, China
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Wu L, Wang H, Liu S, Liu M, Liu J, Wang Y, Sun L, Yang W, Shen H. Mapping of CaPP2C35 involved in the formation of light-green immature pepper (Capsicum annuum L.) fruits via GWAS and BSA. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2022; 135:591-604. [PMID: 34762177 DOI: 10.1007/s00122-021-03987-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
Genome-wide association study, bulked segregant analysis, and genetic analysis delimited the LG locus controlling light-green immature pepper fruits into a 35.07 kbp region on chromosome 10. A strong candidate gene, CaPP2C35, was identified in this region. In pepper (Capsicum annuum L.), the common colors of immature fruits are yellowish white, milky yellow, green, purple, and purplish black. Genes related to dark green, white, and purple immature fruits have been cloned; however, only a few studies have investigated light-green immature fruits. Here, we performed a genetic study using light-green (17C827) and green (17C658) immature fruits. The light-green color of immature fruits was controlled by a single locus-dominant genetic trait compared with the green color of immature fruits. We also performed a genome-wide association study and bulked segregant analysis of immature-fruit color and mapped the LG locus to a 35.07 kbp region on chromosome 10. Only one gene, Capana10g001710, was found in this region. A G-A substitution occurred at the 313th base of the Capana10g001710 coding sequence in 17C827, resulting in the conversion of the α-helix of its encoded PP2C35 protein into a β-fold. The expression of Capana10g001710 (termed CaPP2C35) in 17C827 was significantly higher than in 17C658. Silencing CaPP2C35 in 17C827 resulted in an increase in chlorophyll content in the exocarp and the appearance of green stripes on the surface of the fruit. These results indicate that CaPP2C35 may be involved in the formation of light-green immature fruits by regulating the accumulation of chlorophyll content in the exocarp. Thus, these findings lay the foundation for further studies and genetic improvement of immature-fruit color in pepper.
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Affiliation(s)
- Lang Wu
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Haoran Wang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Sujun Liu
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Mengmeng Liu
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Jinkui Liu
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Yihao Wang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Liang Sun
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Wencai Yang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China
| | - Huolin Shen
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, Department of Vegetable Science, College of Horticulture, China Agricultural University, Beijing, 100193, China.
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Gao C, Zhu X, Lu S, Xu J, Zhou R, Lv J, Chen Y, Cao Y. Functional Analysis of OsCIPK17 in Rice Grain Filling. FRONTIERS IN PLANT SCIENCE 2022; 12:808312. [PMID: 35145535 PMCID: PMC8821165 DOI: 10.3389/fpls.2021.808312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
We used mutant cipk17 and Nipponbare in field experiments to analyze agronomic traits, photosynthetic parameters, transcriptome, and gene expression. The results demonstrated cytoplasmic localization of OsCIPK17, while GUS allogeneic (A. thaliana) tissue-staining and quantitative analysis showed the gene was expressed in many organs, including flower buds; furthermore, it was involved in root, stem, and leaf growth. Compared to Nipponbare plants, grain filling rate and final grain weight decreased in plants of the knockout mutant owing to a delay in attainment of maximum grain filling rate. Photosystem II (PSII) efficiency was also reduced. Enrichment analysis showed that the functions of differentially expressed genes (DEGs) focused on nucleoside-, nucleotide-, and lipid-binding, as well as hydrolase, transferase, and phosphorylase activities. Signaling pathways mainly included starch and sucrose metabolism, as well as photosynthesis. Additionally, some DEGs were verified by fluorescence analysis. The results showed that knockout of OsCIPK17 affected photosynthesis and starch-, sucrose-, and amino acid metabolism-related gene expression; furthermore, the mutation reduced PSII utilization efficiency, it blocked the synthesis and metabolism of starch and sucrose, and affected the formation and transport of assimilates, thereby reducing final grain weight.
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Ankit A, Singh A, Kumar S, Singh A. Morphophysiological and transcriptome analysis reveal that reprogramming of metabolism, phytohormones and root development pathways governs the potassium (K +) deficiency response in two contrasting chickpea cultivars. FRONTIERS IN PLANT SCIENCE 2022; 13:1054821. [PMID: 36714783 PMCID: PMC9875034 DOI: 10.3389/fpls.2022.1054821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 12/05/2022] [Indexed: 05/10/2023]
Abstract
Potassium (K+) is an essential macronutrient for plant growth and development. K+ deficiency hampers important plant processes, such as enzyme activation, protein synthesis, photosynthesis and stomata movement. Molecular mechanism of K+ deficiency tolerance has been partly understood in model plants Arabidopsis, but its knowledge in legume crop chickpea is missing. Here, morphophysiological analysis revealed that among five high yielding desi chickpea cultivars, PUSA362 shows stunted plant growth, reduced primary root growth and low K+ content under K+ deficiency. In contrast, PUSA372 had negligible effect on these parameters suggesting that PUSA362 is K+ deficiency sensitive and PUSA372 is a K+ deficiency tolerant chickpea cultivar. RNA-seq based transcriptome analysis under K+ deficiency revealed a total of 820 differential expressed genes (DEG's) in PUSA362 and 682 DEGs in PUSA372. These DEGs belongs to different functional categories, such as plant metabolism, signal transduction components, transcription factors, ion/nutrient transporters, phytohormone biosynthesis and signalling, and root growth and development. RNA-seq expression of randomly selected 16 DEGs was validated by RT-qPCR. Out of 16 genes, 13 showed expression pattern similar to RNA-seq expression, that verified the RNA-seq expression data. Total 258 and 159 genes were exclusively up-regulated, and 386 and 347 genes were down-regulated, respectively in PUSA362 and PUSA372. 14 DEGs showed contrasting expression pattern as they were up-regulated in PUSA362 and down-regulated in PUSA372. These include somatic embryogenesis receptor-like kinase 1, thaumatin-like protein, ferric reduction oxidase 2 and transcription factor bHLH93. Nine genes which were down-regulated in PUSA362 found to be up-regulated in PUSA372, including glutathione S-transferase like, putative calmodulin-like 19, high affinity nitrate transporter 2.4 and ERF17-like protein. Some important carbohydrate metabolism related genes, like fructose-1,6-bisphosphatase and sucrose synthase, and root growth related Expansin gene were exclusively down-regulated, while an ethylene biosynthesis gene 1-aminocyclopropane-1-carboxylate oxidase 1 (ACO1) was up-regulated in PUSA362. Interplay of these and several other genes related to hormones (auxin, cytokinin, GA etc.), signal transduction components (like CBLs and CIPKs), ion transporters and transcription factors might underlie the contrasting response of two chickpea cultivars to K+ deficiency. In future, some of these key genes will be utilized in genetic engineering and breeding programs for developing chickpea cultivars with improved K+ use efficiency (KUE) and K+ deficiency tolerance traits.
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Kashtoh H, Baek KH. Structural and Functional Insights into the Role of Guard Cell Ion Channels in Abiotic Stress-Induced Stomatal Closure. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10122774. [PMID: 34961246 PMCID: PMC8707303 DOI: 10.3390/plants10122774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/25/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
A stomatal pore is formed by a pair of specialized guard cells and serves as a major gateway for water transpiration and atmospheric CO2 influx for photosynthesis in plants. These pores must be tightly controlled, as inadequate CO2 intake and excessive water loss are devastating for plants. When the plants are exposed to extreme weather conditions such as high CO2 levels, O3, low air humidity, and drought, the turgor pressure of the guard cells exhibits an appropriate response against these stresses, which leads to stomatal closure. This phenomenon involves a complex network of ion channels and their regulation. It is well-established that the turgor pressure of guard cells is regulated by ions transportation across the membrane, such as anions and potassium ions. In this review, the guard cell ion channels are discussed, highlighting the structure and functions of key ion channels; the SLAC1 anion channel and KAT1 potassium channel, and their regulatory components, emphasizing their significance in guard cell response to various stimuli.
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Lefoulon C. The bare necessities of plant K+ channel regulation. PLANT PHYSIOLOGY 2021; 187:2092-2109. [PMID: 34618033 PMCID: PMC8644596 DOI: 10.1093/plphys/kiab266] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 05/11/2021] [Indexed: 05/29/2023]
Abstract
Potassium (K+) channels serve a wide range of functions in plants from mineral nutrition and osmotic balance to turgor generation for cell expansion and guard cell aperture control. Plant K+ channels are members of the superfamily of voltage-dependent K+ channels, or Kv channels, that include the Shaker channels first identified in fruit flies (Drosophila melanogaster). Kv channels have been studied in depth over the past half century and are the best-known of the voltage-dependent channels in plants. Like the Kv channels of animals, the plant Kv channels are regulated over timescales of milliseconds by conformational mechanisms that are commonly referred to as gating. Many aspects of gating are now well established, but these channels still hold some secrets, especially when it comes to the control of gating. How this control is achieved is especially important, as it holds substantial prospects for solutions to plant breeding with improved growth and water use efficiencies. Resolution of the structure for the KAT1 K+ channel, the first channel from plants to be crystallized, shows that many previous assumptions about how the channels function need now to be revisited. Here, I strip the plant Kv channels bare to understand how they work, how they are gated by voltage and, in some cases, by K+ itself, and how the gating of these channels can be regulated by the binding with other protein partners. Each of these features of plant Kv channels has important implications for plant physiology.
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Affiliation(s)
- Cécile Lefoulon
- Laboratory of Plant Physiology and Biophysics, Bower Building, University of Glasgow, Glasgow G12 8QQ, Scotland
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38
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Feng CZ, Luo YX, Wang PD, Gilliham M, Long Y. MYB77 regulates high-affinity potassium uptake by promoting expression of HAK5. THE NEW PHYTOLOGIST 2021; 232:176-189. [PMID: 34192362 DOI: 10.1111/nph.17589] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 06/22/2021] [Indexed: 05/25/2023]
Abstract
In Arabidopsis, the high-affinity K+ transporter HAK5 is the major pathway for root K+ uptake when below 100 µM; HAK5 responds to Low-K+ (LK) stress by strongly and rapidly increasing its expression during K+ -deficiency. Therefore, positive regulators of HAK5 expression have the potential to improve K+ uptake under LK. Here, we show that mutants of the transcription factor MYB77 share a LK-induced leaf chlorosis phenotype, lower K+ content, and lower Rb+ uptake of the hak5 mutant, but not the shorter root growth, and that overexpression of MYB77 enhanced K+ uptake and improved tolerance to LK stress. Furthermore, we demonstrated that MYB77 positively regulates the expression of HAK5, by binding to the HAK5 promoter and enhances high-affinity K+ uptake of roots. As such, our results reveal a novel pathway for enhancing HAK5 expression under LK stress, and provides a candidate for increasing the tolerance of plants to LK.
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Affiliation(s)
- Cui-Zhu Feng
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475001, China
| | - Yun-Xin Luo
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475001, China
| | - Peng-Dan Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475001, China
| | - Matthew Gilliham
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine & Waite Research Institute, University of Adelaide, Glen Osmond, SA, 5064, Australia
| | - Yu Long
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475001, China
- ARC Centre of Excellence in Plant Energy Biology, School of Agriculture, Food and Wine & Waite Research Institute, University of Adelaide, Glen Osmond, SA, 5064, Australia
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Yan Y, He M, Guo J, Zeng H, Wei Y, Liu G, Hu W, Shi H. The CBL1/9-CIPK23-AKT1 complex is essential for low potassium response in cassava. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 167:430-437. [PMID: 34411782 DOI: 10.1016/j.plaphy.2021.08.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Cassava is a food crop and an important energy crop worldwide. However, its yield and quality are easily affected by low K+ stress, and the molecular mechanism of potassium channel is unknown in cassava. Herein, we revealed that calcineurin B-like 1/9 (MeCBL1/9)-CBL-interacting protein kinase 23 (MeCIPK23)-K+ TRANSPORTER1 (MeAKT1) complex plays an important role in low potassium response in cassava. Firstly, this study verified the in vivo role of MeAKT1 in K+ uptake in yeast. Secondly, we found that MeCBL1, MeCBL9, MeCIPK23 and MeAKT1 are involved in the absorption of K+ in cassava, and MeCBL1/9-CIPK23 complex is essential for MeAKT1-mediated K+ uptake. Moreover, MeCBL1/9-MeCIPK23-MeAKT1 showed different expression in different cassava varieties contrasting in the resistance to low K+ stress. Taken together, this study provides new insights into further improvement of K+ uptake in cassava.
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Affiliation(s)
- Yu Yan
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Mei He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Jingru Guo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Hongqiu Zeng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Guoyin Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China
| | - Wei Hu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Xueyuan Road 4, Haikou, Hainan province, 571101, China.
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, College of Forestry, Hainan University, Haikou, Hainan province, 570228, China.
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Monder H, Maillard M, Chérel I, Zimmermann SD, Paris N, Cuéllar T, Gaillard I. Adjustment of K + Fluxes and Grapevine Defense in the Face of Climate Change. Int J Mol Sci 2021; 22:10398. [PMID: 34638737 PMCID: PMC8508874 DOI: 10.3390/ijms221910398] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/18/2021] [Accepted: 09/20/2021] [Indexed: 12/18/2022] Open
Abstract
Grapevine is one of the most economically important fruit crops due to the high value of its fruit and its importance in winemaking. The current decrease in grape berry quality and production can be seen as the consequence of various abiotic constraints imposed by climate changes. Specifically, produced wines have become too sweet, with a stronger impression of alcohol and fewer aromatic qualities. Potassium is known to play a major role in grapevine growth, as well as grape composition and wine quality. Importantly, potassium ions (K+) are involved in the initiation and maintenance of the berry loading process during ripening. Moreover, K+ has also been implicated in various defense mechanisms against abiotic stress. The first part of this review discusses the main negative consequences of the current climate, how they disturb the quality of grape berries at harvest and thus ultimately compromise the potential to obtain a great wine. In the second part, the essential electrical and osmotic functions of K+, which are intimately dependent on K+ transport systems, membrane energization, and cell K+ homeostasis, are presented. This knowledge will help to select crops that are better adapted to adverse environmental conditions.
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Affiliation(s)
- Houssein Monder
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
| | - Morgan Maillard
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
| | - Isabelle Chérel
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
| | - Sabine Dagmar Zimmermann
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
| | - Nadine Paris
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
| | - Teresa Cuéllar
- CIRAD, UMR AGAP, Univ Montpellier, INRAE, Institut Agro, F-34398 Montpellier, France;
| | - Isabelle Gaillard
- BPMP, Univ Montpellier, CNRS, INRAE, Institut Agro, F-34060 Montpellier, France; (H.M.); (M.M.); (I.C.); (S.D.Z.); (N.P.)
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Ródenas R, Vert G. Regulation of Root Nutrient Transporters by CIPK23: 'One Kinase to Rule Them All'. PLANT & CELL PHYSIOLOGY 2021; 62:553-563. [PMID: 33367898 DOI: 10.1093/pcp/pcaa156] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 11/27/2020] [Indexed: 05/21/2023]
Abstract
Protein kinases constitute essential regulatory components in the majority of cellular processes in eukaryotic cells. The CBL-INTERACTING PROTEIN KINASE (CIPK) family of plant protein kinases functions in calcium (Ca2+)-related signaling pathways and is therefore involved in the response to a wide variety of signals in plants. By covalently linking phosphate groups to their target proteins, CIPKs regulate the activity of downstream targets, their localization, their stability and their ability to interact with other proteins. In Arabidopsis, the CIPK23 kinase has emerged as a major hub driving root responses to diverse environmental stresses, including drought, salinity and nutrient imbalances, such as potassium, nitrate and iron deficiencies, as well as ammonium, magnesium and non-iron metal toxicities. This review will chiefly report on the prominent roles of CIPK23 in the regulation of plant nutrient transporters and on the underlying molecular mechanisms. We will also discuss the different scenarios explaining how a single promiscuous kinase, such as CIPK23, may convey specific responses to a myriad of signals.
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Affiliation(s)
- Reyes Ródenas
- Plant Science Research Laboratory (LRSV), UMR5546, CNRS, Université Toulouse 3, 24 Chemin de Borde Rouge, 31320 Auzeville Tolosane, France
| | - Grégory Vert
- Plant Science Research Laboratory (LRSV), UMR5546, CNRS, Université Toulouse 3, 24 Chemin de Borde Rouge, 31320 Auzeville Tolosane, France
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Feng X, Wang Y, Zhang N, Gao S, Wu J, Liu R, Huang Y, Zhang J, Qi Y. Comparative phylogenetic analysis of CBL reveals the gene family evolution and functional divergence in Saccharum spontaneum. BMC PLANT BIOLOGY 2021; 21:395. [PMID: 34425748 PMCID: PMC8383383 DOI: 10.1186/s12870-021-03175-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 08/11/2021] [Indexed: 05/04/2023]
Abstract
BACKGROUND The identification and functional analysis of genes that improve tolerance to low potassium stress in S. spontaneum is crucial for breeding sugarcane cultivars with efficient potassium utilization. Calcineurin B-like (CBL) protein is a calcium sensor that interacts with specific CBL-interacting protein kinases (CIPKs) upon plants' exposure to various abiotic stresses. RESULTS In this study, nine CBL genes were identified from S. spontaneum. Phylogenetic analysis of 113 CBLs from 13 representative plants showed gene expansion and strong purifying selection in the CBL family. Analysis of CBL expression patterns revealed that SsCBL01 was the most commonly expressed gene in various tissues at different developmental stages. Expression analysis of SsCBLs under low K+ stress indicated that potassium deficiency moderately altered the transcription of SsCBLs. Subcellular localization showed that SsCBL01 is a plasma membrane protein and heterologous expression in yeast suggested that, while SsCBL01 alone could not absorb K+, it positively regulated K+ absorption mediated by the potassium transporter SsHAK1. CONCLUSIONS This study provided insights into the evolution of the CBL gene family and preliminarily demonstrated that the plasma membrane protein SsCBL01 was involved in the response to low K+ stress in S. spontaneum.
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Affiliation(s)
- Xiaomin Feng
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Yongjun Wang
- Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Nannan Zhang
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Shuai Gao
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Jiayun Wu
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Rui Liu
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Yonghong Huang
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
| | - Jisen Zhang
- Center for Genomics and Biotechnology, Fujian Provincial Key Laboratory of Haixia Applied Plant Systems Biology, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yongwen Qi
- Guangdong Sugarcane Genetic Improvement Engineering Center, Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Room 1909, Biological Engineering Building, Jianghai Avenue, Haizhu District, Guangzhou, 510316 Guangdong Province China
- Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, 530007 China
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The expression of constitutively active CPK3 impairs potassium uptake and transport in Arabidopsis under low K + stress. Cell Calcium 2021; 98:102447. [PMID: 34333245 DOI: 10.1016/j.ceca.2021.102447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 07/09/2021] [Accepted: 07/09/2021] [Indexed: 11/24/2022]
Abstract
Potassium (K+) is a vital cation and is involved in multiple physiological functions in plants. K+ uptake from outer medium by roots is a tightly regulated process and is mainly carried out by two high affinity K+ transport proteins AKT1 and HAK5. It has been shown that calcium (Ca2+) signaling plays important roles in the regulation of K+ transport in plants. Ca2+-dependent protein kinases (CPKs) are involved in regulation of multiple K+ channels in different tissues. However, it remains to be studied whether CPKs are involved in the regulation of AKT1 and, thereby, K+ transport. Here, we have shown that constitutively active version of CPK3 (CPK3CA) is involved in K+ transport in Arabidopsis via regulating AKT1 under low K+ conditions. The constitutively active version of CPK3 (CPK3CA), as well as CPK21 (CPK21CA), inhibited K+ currents of AKT1 in Xenopus oocytes. CPK3CA inhibited only channel conductance but had no effect on channel open probability. Further, CPK3 in vivo interacted with AKT1. Under low K+ conditions, cpk3 knock-out mutants had no distinct phenotype, while the seedlings of 35S-CPK3CA overexpressing lines died even at normal K+ concentration. Further, the transgenic lines expressing CPK3CA under AKT1 promoter (ProAKT1-CPK3CA) exhibited the same phenotype as akt1 mutant with a defective root growth and leaf chlorosis. Moreover, ProAKT1-CPK3CA transgenic lines had lower root and shoot K+ contents than Col. Overall, the data reported here demonstrate that the expression of constitutively active of CPK3 impairs potassium uptake and transports in Arabidopsis under low K+ stress by inhibiting the activity of AKT1.
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Abstract
Our knowledge of plant ion channels was significantly enhanced by the first application of the patch-clamp technique to isolated guard cell protoplasts over 35 years ago. Since then, research has demonstrated the importance of ion channels in the control of gas exchange in guard cells, their role in nutrient uptake in roots, and the participation of calcium-permeable cation channels in the regulation of cell signaling affected by the intracellular concentrations of this second messenger. In recent years, through the employment of reverse genetics, mutant proteins, and heterologous expression systems, research on ion channels has identified mechanisms that modify their activity through protein-protein interactions or that result in activation and/or deactivation of ion channels through posttranslational modifications. Additional and confirmatory information on ion channel functioning has been derived from the crystallization and molecular modeling of plant proteins that, together with functional analyses, have helped to increase our knowledge of the functioning of these important membrane proteins that may eventually help to improve crop yield. Here, an update on the advances obtained in plant ion channel function during the last few years is presented.
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Affiliation(s)
- Omar Pantoja
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca 62210, México;
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45
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Meng D, Dong B, Niu L, Song Z, Wang L, Amin R, Cao H, Li H, Yang Q, Fu Y. The pigeon pea CcCIPK14-CcCBL1 pair positively modulates drought tolerance by enhancing flavonoid biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:1278-1297. [PMID: 33733535 DOI: 10.1111/tpj.15234] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 03/09/2021] [Accepted: 03/10/2021] [Indexed: 05/22/2023]
Abstract
Calcineurin B-like (CBL)-interacting protein kinases (CIPKs) play a central role in Ca2+ signalling and promote drought tolerance in plants. The CIPK gene family in pigeon pea (Cajanus cajan L.), a major food crop affected by drought, has not previously been characterised. Here, we identified 28 CIPK genes in the pigeon pea genome. Five CcCIPK genes were strongly upregulated in roots upon drought treatment and were selected for further characterisation. Overexpression of CcCIPK13 and CcCIPK14 increased survival rates by two- to three-fold relative to controls after 14 days of drought. Furthermore, the three major flavonoids, genistin, genistein and apigenin, were significantly upregulated in the same transgenic plants. Using CcCIPK14 as bait, we performed a yeast two-hybrid screen and identified six interactors, including CcCBL1. CcCIPK14 exhibited autophosphorylation and phosphorylation of CcCBL1 in vitro. CcCBL1-overexpressed plants displayed higher survival rates upon drought stress as well as higher expression of flavonoid biosynthetic genes and flavonoid content. CcCIPK14-overexpressed plants in which CcCBL1 transcript levels were reduced by RNA interference had lower survival rates, which indicated CcCBL1 in the same pathway as CcCIPK14. Together, our results demonstrate a role for the CcCIPK14-CcCBL1 complex in drought stress tolerance through the regulation of flavonoid biosynthesis in pigeon pea.
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Affiliation(s)
- Dong Meng
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Biying Dong
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Lili Niu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Zhihua Song
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Litao Wang
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Rohul Amin
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Hongyan Cao
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Hanghang Li
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Qing Yang
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Forestry, Beijing Forestry University, Bejing, China
| | - Yujie Fu
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
- College of Forestry, Beijing Forestry University, Bejing, China
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, China
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Jiang H, Ma QJ, Zhong MS, Gao HN, Li YY, Hao YJ. The apple palmitoyltransferase MdPAT16 influences sugar content and salt tolerance via an MdCBL1-MdCIPK13-MdSUT2.2 pathway. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:689-705. [PMID: 33548154 DOI: 10.1111/tpj.15191] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 01/22/2021] [Accepted: 02/02/2021] [Indexed: 05/21/2023]
Abstract
Protein S-acyltransferases (PATs) are a category of eukaryotic transmembrane proteins that mediate the S-acylation of their target proteins. S-acylation, commonly known as palmitoylation, is a reversible protein modification that regulates the membrane association and function of target proteins. However, the functions and mechanisms of PATs in apple (Malus domestica) remain poorly understood. In this study, an MdPAT family member, MdPAT16, was identified and shown to have palmitoyltransferase activity. We demonstrated that this gene responds to salt stress and that its expression improves plant salt stress resistance. In addition, its overexpression significantly promotes the accumulation of soluble sugars. The same phenotypes were observed in transgenic tissue culture seedlings, transgenic roots, and Arabidopsis thaliana that ectopically expressed MdPAT16. MdPAT16 was shown to interact with MdCBL1 and stabilize MdCBL1 protein levels through palmitoylation. The N-terminal sequence of MdCBL1 contains a palmitoylation site, and its N-terminal deletion led to changes in MdCBL1 protein stability and subcellular localization. The phenotypes of MdCBL1 transgenic roots and transiently injected apple fruits were fully consistent with the sugar accumulation phenotype of MdPAT16. Mutation of the palmitoylation site interfered with this phenotype. These findings suggest that MdPAT16 palmitoylates its downstream target proteins, improving their stability. This may be a missing link in the plant salt stress response pathway and have an important impact on fruit quality.
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Affiliation(s)
- Han Jiang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Qi-Jun Ma
- State Key Laboratory of Crop Biology, National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Ming-Shuang Zhong
- State Key Laboratory of Crop Biology, National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Huai-Na Gao
- State Key Laboratory of Crop Biology, National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Yuan-Yuan Li
- State Key Laboratory of Crop Biology, National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
| | - Yu-Jin Hao
- State Key Laboratory of Crop Biology, National Research Center for Apple Engineering and Technology, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, Shandong, 271018, China
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47
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Zhao S, Zhang Q, Liu M, Zhou H, Ma C, Wang P. Regulation of Plant Responses to Salt Stress. Int J Mol Sci 2021; 22:ijms22094609. [PMID: 33924753 PMCID: PMC8125386 DOI: 10.3390/ijms22094609] [Citation(s) in RCA: 239] [Impact Index Per Article: 79.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 12/16/2022] Open
Abstract
Salt stress is a major environmental stress that affects plant growth and development. Plants are sessile and thus have to develop suitable mechanisms to adapt to high-salt environments. Salt stress increases the intracellular osmotic pressure and can cause the accumulation of sodium to toxic levels. Thus, in response to salt stress signals, plants adapt via various mechanisms, including regulating ion homeostasis, activating the osmotic stress pathway, mediating plant hormone signaling, and regulating cytoskeleton dynamics and the cell wall composition. Unraveling the mechanisms underlying these physiological and biochemical responses to salt stress could provide valuable strategies to improve agricultural crop yields. In this review, we summarize recent developments in our understanding of the regulation of plant salt stress.
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Affiliation(s)
- Shuangshuang Zhao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan 250014, China; (Q.Z.); (M.L.); (C.M.)
- Correspondence: (S.Z.); (P.W.); Tel.: +86-531-8618-0792 (S.Z.); Fax: +86-531-8618-0792 (P.W.)
| | - Qikun Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan 250014, China; (Q.Z.); (M.L.); (C.M.)
| | - Mingyue Liu
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan 250014, China; (Q.Z.); (M.L.); (C.M.)
| | - Huapeng Zhou
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610064, China;
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan 250014, China; (Q.Z.); (M.L.); (C.M.)
| | - Pingping Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan 250014, China; (Q.Z.); (M.L.); (C.M.)
- Correspondence: (S.Z.); (P.W.); Tel.: +86-531-8618-0792 (S.Z.); Fax: +86-531-8618-0792 (P.W.)
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Ródenas R, Ragel P, Nieves-Cordones M, Martínez-Martínez A, Amo J, Lara A, Martínez V, Quintero FJ, Pardo JM, Rubio F. Insights into the mechanisms of transport and regulation of the arabidopsis high-affinity K+ transporter HAK51. PLANT PHYSIOLOGY 2021; 185:1860-1874. [PMID: 33595056 PMCID: PMC8133630 DOI: 10.1093/plphys/kiab028] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 01/11/2021] [Indexed: 05/02/2023]
Abstract
The high-affinity K+ transporter HAK5 from Arabidopsis (Arabidopsis thaliana) is essential for K+ acquisition and plant growth at low micromolar K+ concentrations. Despite its functional relevance in plant nutrition, information about functional domains of HAK5 is scarce. Its activity is enhanced by phosphorylation via the AtCIPK23/AtCBL1-9 complex. Based on the recently published three-dimensionalstructure of the bacterial ortholog KimA from Bacillus subtilis, we have modeled AtHAK5 and, by a mutational approach, identified residues G67, Y70, G71, D72, D201, and E312 as essential for transporter function. According to the structural model, residues D72, D201, and E312 may bind K+, whereas residues G67, Y70, and G71 may shape the selective filter for K+, which resembles that of K+shaker-like channels. In addition, we show that phosphorylation of residue S35 by AtCIPK23 is required for reaching maximal transport activity. Serial deletions of the AtHAK5 C-terminus disclosed the presence of an autoinhibitory domain located between residues 571 and 633 together with an AtCIPK23-dependent activation domain downstream of position 633. Presumably, autoinhibition of AtHAK5 is counteracted by phosphorylation of S35 by AtCIPK23. Our results provide a molecular model for K+ transport and describe CIPK-CBL-mediated regulation of plant HAK transporters.
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Affiliation(s)
- Reyes Ródenas
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
- Present address: Plant Science Research Laboratory (LRSV), UMR5546 CNRS/Université Toulouse 3, 24 chemin de Borde Rouge, 31320 Auzeville-Tolosane, France
| | - Paula Ragel
- Instituto de Bioquímica Vegetal y Fotosíntesis, cic-Cartuja, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, 41092 Sevilla, Spain
- Present address: Centre for Organismal Studies (COS), Department of Cell Biology, Heidelberg University, Heidelberg, Germany
| | - Manuel Nieves-Cordones
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
| | - Almudena Martínez-Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
| | - Jesús Amo
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
| | - Alberto Lara
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
| | - Vicente Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
| | - Francisco J Quintero
- Instituto de Bioquímica Vegetal y Fotosíntesis, cic-Cartuja, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, 41092 Sevilla, Spain
| | - Jose M Pardo
- Instituto de Bioquímica Vegetal y Fotosíntesis, cic-Cartuja, Consejo Superior de Investigaciones Científicas-Universidad de Sevilla, 41092 Sevilla, Spain
| | - Francisco Rubio
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas, Campus de Espinardo, 30100 Murcia, Spain
- Author for communication:
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López-Serrano L, Calatayud Á, López-Galarza S, Serrano R, Bueso E. Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach. BMC PLANT BIOLOGY 2021; 21:169. [PMID: 33832439 PMCID: PMC8028838 DOI: 10.1186/s12870-021-02938-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 03/25/2021] [Indexed: 05/08/2023]
Abstract
BACKGROUND Pepper is one of the most cultivated crops worldwide, but is sensitive to salinity. This sensitivity is dependent on varieties and our knowledge about how they can face such stress is limited, mainly according to a molecular point of view. This is the main reason why we decided to develop this transcriptomic analysis. Tolerant and sensitive accessions, respectively called A25 and A6, were grown for 14 days under control conditions and irrigated with 70 mM of NaCl. Biomass, different physiological parameters and differentially expressed genes were analysed to give response to differential salinity mechanisms between both accessions. RESULTS The genetic changes found between the accessions under both control and stress conditions could explain the physiological behaviour in A25 by the decrease of osmotic potential that could be due mainly to an increase in potassium and proline accumulation, improved growth (e.g. expansins), more efficient starch accumulation (e.g. BAM1), ion homeostasis (e.g. CBL9, HAI3, BASS1), photosynthetic protection (e.g. FIB1A, TIL, JAR1) and antioxidant activity (e.g. PSDS3, SnRK2.10). In addition, misregulation of ABA signalling (e.g. HAB1, ERD4, HAI3) and other stress signalling genes (e.g. JAR1) would appear crucial to explain the different sensitivity to NaCl in both accessions. CONCLUSIONS After analysing the physiological behaviour and transcriptomic results, we have concluded that A25 accession utilizes different strategies to cope better salt stress, being ABA-signalling a pivotal point of regulation. However, other strategies, such as the decrease in osmotic potential to preserve water status in leaves seem to be important to explain the defence response to salinity in pepper A25 plants.
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Affiliation(s)
- Lidia López-Serrano
- Centro de Citricultura y Producción Vegetal, Departamento de Horticultura, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,700 Moncada, Valencia, Spain
| | - Ángeles Calatayud
- Centro de Citricultura y Producción Vegetal, Departamento de Horticultura, Instituto Valenciano de Investigaciones Agrarias, CV-315, Km 10,700 Moncada, Valencia, Spain
| | - Salvador López-Galarza
- Departamento de Producción Vegetal, Universitat Politècnica de València, Valencia, Spain
| | - Ramón Serrano
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-C.S.I.C, Camino de Vera s/n, 46022, Valencia, Spain
| | - Eduardo Bueso
- Instituto de Biología Molecular y Celular de Plantas, Universidad Politécnica de Valencia-C.S.I.C, Camino de Vera s/n, 46022, Valencia, Spain.
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50
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Yang D, Li F, Yi F, Eneji AE, Tian X, Li Z. Transcriptome Analysis Unravels Key Factors Involved in Response to Potassium Deficiency and Feedback Regulation of K + Uptake in Cotton Roots. Int J Mol Sci 2021; 22:3133. [PMID: 33808570 PMCID: PMC8003395 DOI: 10.3390/ijms22063133] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 03/16/2021] [Accepted: 03/16/2021] [Indexed: 01/19/2023] Open
Abstract
To properly understand cotton responses to potassium (K+) deficiency and how its shoot feedback regulates K+ uptake and root growth, we analyzed the changes in root transcriptome induced by low K+ (0.03 mM K+, lasting three days) in self-grafts of a K+ inefficient cotton variety (CCRI41/CCRI41, scion/rootstock) and its reciprocal grafts with a K+ efficient variety (SCRC22/CCRI41). Compared with CCRI41/CCRI41, the SCRC22 scion enhanced the K+ uptake and root growth of CCRI41 rootstock. A total of 1968 and 2539 differently expressed genes (DEGs) were identified in the roots of CCRI41/CCRI41 and SCRC22/CCRI41 in response to K+ deficiency, respectively. The overlapped and similarly (both up- or both down-) regulated DEGs in the two grafts were considered the basic response to K+ deficiency in cotton roots, whereas the DEGs only found in SCRC22/CCRI41 (1954) and those oppositely (one up- and the other down-) regulated in the two grafts might be the key factors involved in the feedback regulation of K+ uptake and root growth. The expression level of four putative K+ transporter genes (three GhHAK5s and one GhKUP3) increased in both grafts under low K+, which could enable plants to cope with K+ deficiency. In addition, two ethylene response factors (ERFs), GhERF15 and GhESE3, both down-regulated in the roots of CCRI41/CCRI41 and SCRC22/CCRI41, may negatively regulate K+ uptake in cotton roots due to higher net K+ uptake rate in their virus-induced gene silencing (VIGS) plants. In terms of feedback regulation of K+ uptake and root growth, several up-regulated DEGs related to Ca2+ binding and CIPK (CBL-interacting protein kinases), one up-regulated GhKUP3 and several up-regulated GhNRT2.1s probably play important roles. In conclusion, these results provide a deeper insight into the molecular mechanisms involved in basic response to low K+ stress in cotton roots and feedback regulation of K+ uptake, and present several low K+ tolerance-associated genes that need to be further identified and characterized.
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Affiliation(s)
- Doudou Yang
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Fangjun Li
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Fei Yi
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - A Egrinya Eneji
- Department of Soil Science, Faculty of Agriculture, Forestry and Wildlife Resources Management, University of Calabar, Calabar 540271, Nigeria
| | - Xiaoli Tian
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Zhaohu Li
- State Key Laboratory of Plant Physiology and Biochemistry, China Agricultural University, Beijing 100193, China
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
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