BES/BZR Transcription Factor TaBZR2 Positively Regulates Drought Responses by Activation of TaGST1
BRI1-EMS suppressor (BES)/brassinazole-resistant (BZR) family transcription factors are involved in a variety of physiological processes, but the biological functions of some BES/BZR transcription factors remain unknown; moreover, it is not clear if any of these proteins function in the regulation o...
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Published in | Plant physiology (Bethesda) Vol. 180; no. 1; pp. 605 - 620 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
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01.05.2019
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Abstract | BRI1-EMS suppressor (BES)/brassinazole-resistant (BZR) family transcription factors are involved in a variety of physiological processes, but the biological functions of some BES/BZR transcription factors remain unknown; moreover, it is not clear if any of these proteins function in the regulation of plant stress responses. Here, wheat (
) brassinazole-resistant 2 (
)-overexpressing plants exhibited drought tolerant phenotypes, whereas downregulation of
in wheat by RNA interference resulted in elevated drought sensitivity. electrophoretic mobility shift assay and luciferase reporter analysis illustrate that TaBZR2 directly interacts with the gene promoter to activate the expression of
glutathione s-transferase-1 (
), which functions positively in scavenging drought-induced superoxide anions (O
). Moreover, TaBZR2 acts as a positive regulator in brassinosteroid (BR) signaling. Exogenous BR treatment enhanced TaBZR2-mediated O
scavenging and antioxidant enzyme gene expression. Taken together, we demonstrate that a BES/BZR family transcription factor, TaBZR2, functions positively in drought responses by activating
and mediates the crosstalk between BR and drought signaling pathways. Our results thus provide new insights into the mechanisms underlying how BES/BZR family transcription factors contribute to drought tolerance in wheat. |
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AbstractList | BRI1-EMS suppressor (BES)/brassinazole-resistant (BZR) family transcription factors are involved in a variety of physiological processes, but the biological functions of some BES/BZR transcription factors remain unknown; moreover, it is not clear if any of these proteins function in the regulation of plant stress responses. Here, wheat (
) brassinazole-resistant 2 (
)-overexpressing plants exhibited drought tolerant phenotypes, whereas downregulation of
in wheat by RNA interference resulted in elevated drought sensitivity. electrophoretic mobility shift assay and luciferase reporter analysis illustrate that TaBZR2 directly interacts with the gene promoter to activate the expression of
glutathione s-transferase-1 (
), which functions positively in scavenging drought-induced superoxide anions (O
). Moreover, TaBZR2 acts as a positive regulator in brassinosteroid (BR) signaling. Exogenous BR treatment enhanced TaBZR2-mediated O
scavenging and antioxidant enzyme gene expression. Taken together, we demonstrate that a BES/BZR family transcription factor, TaBZR2, functions positively in drought responses by activating
and mediates the crosstalk between BR and drought signaling pathways. Our results thus provide new insights into the mechanisms underlying how BES/BZR family transcription factors contribute to drought tolerance in wheat. |
Author | Gao, Yuan Liu, Yong-Wei Yu, Tai-Fei Ma, You-Zhi Zheng, Wei-Jun Cui, Xiao-Yu Chen, Jun Xu, Zhao-Shi Guo, Jun |
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Snippet | BRI1-EMS suppressor (BES)/brassinazole-resistant (BZR) family transcription factors are involved in a variety of physiological processes, but the biological... |
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SubjectTerms | Brassinosteroids - metabolism Brassinosteroids - pharmacology Cell Nucleus - metabolism Droughts Gene Expression Regulation, Plant - drug effects Glutathione Transferase - genetics Glutathione Transferase - metabolism Plant Proteins - genetics Plant Proteins - metabolism Plants, Genetically Modified Promoter Regions, Genetic RNA Interference Stress, Physiological - genetics Superoxides - metabolism Transcription Factors - genetics Transcription Factors - metabolism Triticum - drug effects Triticum - physiology |
Title | BES/BZR Transcription Factor TaBZR2 Positively Regulates Drought Responses by Activation of TaGST1 |
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