151
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Zhou H, Zhao J, Yang Y, Chen C, Liu Y, Jin X, Chen L, Li X, Deng XW, Schumaker KS, Guo Y. Ubiquitin-specific protease16 modulates salt tolerance in Arabidopsis by regulating Na(+)/H(+) antiport activity and serine hydroxymethyltransferase stability. THE PLANT CELL 2012; 24:5106-22. [PMID: 23232097 PMCID: PMC3556978 DOI: 10.1105/tpc.112.106393] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 10/31/2012] [Accepted: 11/20/2012] [Indexed: 05/19/2023]
Abstract
Protein ubiquitination is a reversible process catalyzed by ubiquitin ligases and ubiquitin-specific proteases (UBPs). We report the identification and characterization of UBP16 in Arabidopsis thaliana. UBP16 is a functional ubiquitin-specific protease and its enzyme activity is required for salt tolerance. Plants lacking UBP16 were hypersensitive to salt stress and accumulated more sodium and less potassium. UBP16 positively regulated plasma membrane Na(+)/H(+) antiport activity. Through yeast two-hybrid screening, we identified a putative target of UBP16, SERINE HYDROXYMETHYLTRANSFERASE1 (SHM1), which has previously been reported to be involved in photorespiration and salt tolerance in Arabidopsis. We found that SHM1 is degraded in a 26S proteasome-dependent process, and UBP16 stabilizes SHM1 by removing the conjugated ubiquitin. Ser hydroxymethyltransferase activity is lower in the ubp16 mutant than in the wild type but higher than in the shm1 mutant. During salt stress, UBP16 and SHM1 function in preventing cell death and reducing reactive oxygen species accumulation, activities that are correlated with increasing Na(+)/H(+) antiport activity. Overexpression of SHM1 in the ubp16 mutant partially rescues its salt-sensitive phenotype. Taken together, our results suggest that UBP16 is involved in salt tolerance in Arabidopsis by modulating sodium transport activity and repressing cell death at least partially through modulating SMH1stability and activity.
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Affiliation(s)
- Huapeng Zhou
- College of Life Science, Beijing Normal University, Beijing 100875, China
- National Institute of Biological Sciences, Beijing 102206, China
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Jinfeng Zhao
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agriculture Sciences, Beijing 100081, China
| | - Yongqing Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Changxi Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yanfen Liu
- National Institute of Biological Sciences, Beijing 102206, China
| | - Xuehua Jin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Limei Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xueyong Li
- National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agriculture Sciences, Beijing 100081, China
| | - Xing Wang Deng
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
| | | | - Yan Guo
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Address correspondence to
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152
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Xu W, Jia L, Baluška F, Ding G, Shi W, Ye N, Zhang J. PIN2 is required for the adaptation of Arabidopsis roots to alkaline stress by modulating proton secretion. JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:6105-14. [PMID: 23002434 PMCID: PMC3481202 DOI: 10.1093/jxb/ers259] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Soil alkalinity is a widespread environmental problem that limits agricultural productivity. The hypothesis that an auxin-regulated proton secretion by plasma membrane H(+)-ATPase plays an important role in root adaption to alkaline stress was studied. It was found that alkaline stress increased auxin transport and PIN2 (an auxin efflux transporter) abundance in the root tip of wild-type Arabidopsis plants (WT). Compared with WT roots, the pin2 mutant roots exhibited much reduced plasma membrane H(+)-ATPase activity, root elongation, auxin transport, and proton secretion under alkaline stress. More importantly, roots of the pks5 mutant (PKS5, a protein kinase) lacking PIN2 (a pks5/pin2 double mutant) lost the previous higher proton-secretion capacity and higher elongation rate of primary roots under alkaline stress. By using Arabidopsis natural accessions with a high proton-secretion capacity, it was found that their PIN2 transcription abundance is positively related to the elongation rate of the primary root and proton-secretion capacity under alkaline stress. Taken together, our results confirm that PIN2 is involved in the PKS5-mediated signalling cascade under alkaline-stress and suggest that PIN2 is required for the adaptation of roots to alkaline stress by modulating proton secretion in the root tip to maintain primary root elongation.
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Affiliation(s)
- Weifeng Xu
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- These authors contributed equally to this paper
| | - Liguo Jia
- Department of Biology, Hong Kong Baptist University, Hong Kong,China
- These authors contributed equally to this paper
| | - František Baluška
- Institute of Cellular and Molecular Botany, University of Bonn, Kirschellee 1, 53115 Bonn, Germany
| | - Guochang Ding
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
- To whom correspondence should be addressed: E-mail: ;
| | - Nenghui Ye
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jianhua Zhang
- School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong
- To whom correspondence should be addressed: E-mail: ;
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153
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Zhou W, Zhou T, Li MX, Zhao CL, Jia N, Wang XX, Sun YZ, Li GL, Xu M, Zhou RG, Li B. The Arabidopsis J-protein AtDjB1 facilitates thermotolerance by protecting cells against heat-induced oxidative damage. THE NEW PHYTOLOGIST 2012; 194:364-378. [PMID: 22356282 DOI: 10.1111/j.1469-8137.2012.04070.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
AtDjB1 belongs to the J-protein family in Arabidopsis thaliana. Its biological functions in plants are largely unknown. In this study, we examined the roles of AtDjB1 in resisting heat and oxidative stresses in A. thaliana using reverse genetic analysis. AtDjB1 knockout plants (atj1-1) were more sensitive to heat stress than wildtype plants, and displayed decreased concentrations of ascorbate (ASC), and increased concentrations of hydrogen peroxide (H(2)O(2)) and oxidative products after heat shock. Application of H(2)O(2) accelerated cell death and decreased seedling viability in atj1-1. Exogenous ASC conferred much greater thermotolerance in atj1-1 than in wildtype plants, suggesting that a lower concentration of ASC in atj1-1 could be responsible for the increased concentration of H(2)O(2) and decreased thermotolerance. Furthermore, AtDjB1 was found to localize to mitochondria, directly interact with a mitochondrial heat-shock protein 70 (mtHSC70-1), and stimulate ATPase activity of mtHSC70-1. AtDjB1 knockout led to the accumulation of cellular ATP and decreased seedling respiration, indicating that AtDjB1 modulated the ASC concentration probably through affecting the function of mitochondria. Taken together, these results suggest that AtDjB1 plays a crucial role in maintaining redox homeostasis, and facilitates thermotolerance by protecting cells against heat-induced oxidative damage.
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Affiliation(s)
- Wei Zhou
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
- Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China
- College of Biology and Engineering, Hebei University of Economics and Business, Shijiazhuang 050061, China
| | - Ting Zhou
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Mi-Xin Li
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Chun-Lan Zhao
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Ning Jia
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Xing-Xing Wang
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Yong-Zhen Sun
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Guo-Liang Li
- Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China
| | - Meng Xu
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Ren-Gang Zhou
- Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China
| | - Bing Li
- Hebei Key Laboratory of Molecular and Cellular Biology, College of Life Science, Hebei Normal University, Shijiazhuang 050024, China
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154
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Saeed M, Dahab AHA, Wangzhen G, Tianzhen Z. A cascade of recently discovered molecular mechanisms involved in abiotic stress tolerance of plants. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2012; 16:188-99. [PMID: 22433075 DOI: 10.1089/omi.2011.0109] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Today, agriculture is facing a tremendous threat from the climate change menace. As human survival is dependent on a constant supply of food from plants as the primary producers, we must aware of the underlying molecular mechanisms that plants have acquired as a result of molecular evolution to cope this rapidly changing environment. This understanding will help us in designing programs aimed at developing crop plant cultivars best suited to our needs of a sustainable agriculture. The field of systems biology is rapidly progressing, and new insight is coming out about the molecular mechanisms involved in abiotic stress tolerance. There is a cascade of changes in transcriptome, proteome, and metabolome of plants during these stress responses. We have tried to cover most pronounced recent developments in the field of "omics" related to abiotic stress tolerance of plants. These changes are very coordinated, and often there is crosstalk between different components of stress tolerance. The functions of various molecular entities are becoming more clear and being associated with more precise biological phenomenon.
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Affiliation(s)
- Muhammad Saeed
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan.
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155
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Du W, Lin H, Chen S, Wu Y, Zhang J, Fuglsang AT, Palmgren MG, Wu W, Guo Y. Phosphorylation of SOS3-like calcium-binding proteins by their interacting SOS2-like protein kinases is a common regulatory mechanism in Arabidopsis. PLANT PHYSIOLOGY 2011; 156:2235-43. [PMID: 21685179 PMCID: PMC3149935 DOI: 10.1104/pp.111.173377] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The Arabidopsis (Arabidopsis thaliana) genome encodes nine Salt Overly Sensitive3 (SOS3)-like calcium-binding proteins (SCaBPs; also named calcineurin B-like protein [CBL]) and 24 SOS2-like protein kinases (PKSs; also named as CBL-interacting protein kinases [CIPKs]). A general regulatory mechanism between these two families is that SCaBP calcium sensors activate PKS kinases by interacting with their FISL motif. In this study, we demonstrated that phosphorylation of SCaBPs by their functional interacting PKSs is another common regulatory mechanism. The phosphorylation site serine-216 at the C terminus of SCaBP1 by PKS24 was identified by liquid chromatography-quadrupole mass spectrometry analysis. This serine residue is conserved within the PFPF motif at the C terminus of SCaBP proteins. Phosphorylation of this site of SCaBP8 by SOS2 has been determined previously. We further showed that CIPK23/PKS17 phosphorylated CBL1/SCaBP5 and CBL9/SCaBP7 and PKS5 phosphorylated SCaBP1 at the same site in vitro and in vivo. Furthermore, the phosphorylation stabilized the interaction between SCaBP and PKS proteins. This tight interaction neutralized the inhibitory effect of PKS5 on plasma membrane H(+)-ATPase activity. These data indicate that SCaBP phosphorylation by their interacting PKS kinases is a critical component of the SCaBP-PKS regulatory pathway in Arabidopsis.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Yan Guo
- Corresponding author; e-mail
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156
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Huang Z, van der Knaap E. Tomato fruit weight 11.3 maps close to fasciated on the bottom of chromosome 11. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2011; 123:465-74. [PMID: 21541852 DOI: 10.1007/s00122-011-1599-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 04/12/2011] [Indexed: 05/23/2023]
Abstract
Fruit weight is an important character in many crops. In tomato (Solanum lycopersicum), fruit weight is controlled by many loci, some of which have a major effect on the trait. Fruit weight 11.3 (fw11.3) and fasciated (fas) have been mapped to the same region on chromosome 11. We sought to determine whether these loci represent alleles of the same or separate genes. We show that fas and fw11.3 are not allelic and instead represent separate genes. The fw11.3 locus was fine-mapped to a 149-kb region comprised of 22 predicted genes. Unlike most fruit weight loci, gene action at fw11.3 indicates that the mutant allele is partially dominant over the wild allele. We also investigate the nature of the genome rearrangement at the fas locus and demonstrate that the mutation is due to a 294-kb inversion disrupting the YABBY gene known to underlie the fas locus.
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Affiliation(s)
- Zejun Huang
- Department of Horticulture and Crop Science, The Ohio State University, 1680 Madison Avenue, Wooster, OH 44691, USA
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157
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Affiliation(s)
- Maike Bublitz
- Centre for Membrane Pumps in Cells and Disease – PUMPKIN, Danish National Research Foundation, Department of Molecular Biology, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus C, Denmark
- Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, DK-8000 Aarhus, Denmark
| | - J. Preben Morth
- Centre for Molecular Medicine Norway, Nordic EMBL Partnership, University of Oslo, P.O. Box 1125, Blindern, N-0318 Oslo, Norway
- Institute for Experimental Medical Research, Oslo University Hospital Ullevaal, N-0407 Oslo, Norway
| | - Poul Nissen
- Centre for Membrane Pumps in Cells and Disease – PUMPKIN, Danish National Research Foundation, Department of Molecular Biology, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus C, Denmark
- Department of Molecular Biology, University of Aarhus, Gustav Wieds Vej 10C, DK-8000 Aarhus, Denmark
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158
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Liu J, Guo Y. The alkaline tolerance in Arabidopsis requires stabilizing microfilament partially through inactivation of PKS5 kinase. J Genet Genomics 2011; 38:307-13. [PMID: 21777855 DOI: 10.1016/j.jgg.2011.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 05/18/2011] [Accepted: 05/19/2011] [Indexed: 10/18/2022]
Abstract
High soil pH is harmful to plant growth and development. The organization and dynamics of microfilament (MF) cytoskeleton play important roles in the plant anti-alkaline process. In the previous study, we determined that alkaline stress induces a signal that triggers MF dynamics-dependent root growth. In this study we identified that PKS5 kinase involves in this regulatory process to facilitate the signal to reach the downstream target MF. Under pH 8.3 treatment, the depolymerization of MF was faster in pks5-4 (PKS5 kinase constitutively activated) than that in wild-type plants. The inhibition of wild-type, pks5-1, and pks5-4 root growth by pH 8.3 was correlated to their MF depolymerization rate. When the plants were treated with phalloidin to stabilize MF, the high pH sensitive phenotype of pks5-4 can be partially rescued. When the plants were treated with a kinase inhibitor Staurosporine, the MF depolymerization rate in pks5-4 was similar as that in wild-type under pH 8.3 treatment and the sensitivity of root growth was also rescued. However, when the plants were treated with LaCl(3), a calcium channel blocker, the root growth sensitivity of pks5-4 under pH 8.3 was rescued but MF depolymerization was even faster than that of plants without LaCl(3) treatment. These results suggest that the PKS5 involves in external high pH signal mediated MF depolymerization, and that may be independent of calcium signal.
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Affiliation(s)
- Juntao Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing
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159
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Xu RR, Qi SD, Lu LT, Chen CT, Wu CA, Zheng CC. A DExD/H box RNA helicase is important for K+ deprivation responses and tolerance in Arabidopsis thaliana. FEBS J 2011; 278:2296-306. [DOI: 10.1111/j.1742-4658.2011.08147.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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160
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Shen L, Kang YGG, Liu L, Yu H. The J-domain protein J3 mediates the integration of flowering signals in Arabidopsis. THE PLANT CELL 2011; 23:499-514. [PMID: 21343416 PMCID: PMC3077791 DOI: 10.1105/tpc.111.083048] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 01/07/2011] [Accepted: 02/08/2011] [Indexed: 05/18/2023]
Abstract
The timing of the switch from vegetative to reproductive development in Arabidopsis thaliana is controlled by an intricate network of flowering pathways, which converge on the transcriptional regulation of two floral pathway integrators, FLOWERING LOCUS T (FT) and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1 (SOC1). SHORT VEGETATIVE PHASE (SVP) acts as a key flowering regulator that represses the expression of FT and SOC1. Here, we report the identification of another potent flowering promoter, Arabidopsis DNAJ HOMOLOG 3 (J3), which mediates the integration of flowering signals through its interaction with SVP. J3 encodes a type I J-domain protein and is ubiquitously expressed in various plant tissues. J3 expression is regulated by multiple flowering pathways. Loss of function of J3 results in a significant late-flowering phenotype, which is partly due to decreased expression of SOC1 and FT. We further show that J3 interacts directly with SVP in the nucleus and prevents in vivo SVP binding to SOC1 and FT regulatory sequences. Our results suggest a flowering mechanism by which J3 integrates flowering signals from several genetic pathways and acts as a transcriptional regulator to upregulate SOC1 and FT through directly attenuating SVP binding to their regulatory sequences during the floral transition.
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Affiliation(s)
| | | | | | - Hao Yu
- Address correspondence to
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161
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Kinoshita T, Hayashi Y. New Insights into the Regulation of Stomatal Opening by Blue Light and Plasma Membrane H+-ATPase. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2011; 289:89-115. [DOI: 10.1016/b978-0-12-386039-2.00003-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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162
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Plant Proton Pumps: Regulatory Circuits Involving H+-ATPase and H+-PPase. SIGNALING AND COMMUNICATION IN PLANTS 2011. [DOI: 10.1007/978-3-642-14369-4_2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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