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The poplar R2R3 MYB transcription factor PtrMYB94 coordinates with abscisic acid signaling to improve drought tolerance in plants.

Identifieur interne : 000062 ( Main/Exploration ); précédent : 000061; suivant : 000063

The poplar R2R3 MYB transcription factor PtrMYB94 coordinates with abscisic acid signaling to improve drought tolerance in plants.

Auteurs : Qing Fang [République populaire de Chine] ; Xianqiang Wang [République populaire de Chine] ; Haiyang Wang [République populaire de Chine] ; Xiaowen Tang [République populaire de Chine] ; Chi Liu [République populaire de Chine] ; Heng Yin [République populaire de Chine] ; Shenglong Ye [République populaire de Chine] ; Yuanzhong Jiang [République populaire de Chine] ; Yanjiao Duan [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

RBID : pubmed:31728530

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English descriptors

Abstract

In plants, R2R3 MYB transcription factors (TFs) consist of one large gene family and are involved in the regulation of many developmental processes and various stresses. However, the functions of most of MYB TFs in woody plants remain unknown. Here, PtrMYB94, an R2R3 MYB TF from Populus trichocarpa, is characterized to be involved in the regulation of drought responses and abscisic acid (ABA) signaling. PtrMYB94 encodes a nuclear-localized R2R3 MYB TF. RT-PCR results showed that the PtrMYB94 transcripts were relatively abundant in leaves and stems, and were induced rapidly in response to dehydration stress. Overexpression of PtrMYB94 improved plant drought responses, suggesting that this MYB TF may functionally regulate poplar adaptability to drought stress. Furthermore, the analysis of transcriptional expression and PtrMYB94 promoter: GUS activity showed that PtrMYB94 responded to ABA induction. PtrMYB94-overexpressing plants exhibited the inhibition of seed germination compared with the wild-type (WT) control under ABA exposure condition. The ABA content was evidently increased in the PtrMYB94-overexpressing plants relative to the WT plants. In addition, transcript levels of several ABA- and drought-responsive genes, such as ABA1 and DREB2B, were up-regulated. Taken together, our results suggest that PtrMYB94 is involved in an ABA-dependent drought stress regulation in Populus.

DOI: 10.1093/treephys/tpz113
PubMed: 31728530


Affiliations:


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Le document en format XML

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<term>Abscisic Acid (MeSH)</term>
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<term>Droughts (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Plant Proteins (genetics)</term>
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<term>Acide abscissique (MeSH)</term>
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<term>Populus (génétique)</term>
<term>Protéines végétales (génétique)</term>
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<div type="abstract" xml:lang="en">In plants, R2R3 MYB transcription factors (TFs) consist of one large gene family and are involved in the regulation of many developmental processes and various stresses. However, the functions of most of MYB TFs in woody plants remain unknown. Here, PtrMYB94, an R2R3 MYB TF from Populus trichocarpa, is characterized to be involved in the regulation of drought responses and abscisic acid (ABA) signaling. PtrMYB94 encodes a nuclear-localized R2R3 MYB TF. RT-PCR results showed that the PtrMYB94 transcripts were relatively abundant in leaves and stems, and were induced rapidly in response to dehydration stress. Overexpression of PtrMYB94 improved plant drought responses, suggesting that this MYB TF may functionally regulate poplar adaptability to drought stress. Furthermore, the analysis of transcriptional expression and PtrMYB94 promoter: GUS activity showed that PtrMYB94 responded to ABA induction. PtrMYB94-overexpressing plants exhibited the inhibition of seed germination compared with the wild-type (WT) control under ABA exposure condition. The ABA content was evidently increased in the PtrMYB94-overexpressing plants relative to the WT plants. In addition, transcript levels of several ABA- and drought-responsive genes, such as ABA1 and DREB2B, were up-regulated. Taken together, our results suggest that PtrMYB94 is involved in an ABA-dependent drought stress regulation in Populus.</div>
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<AbstractText>In plants, R2R3 MYB transcription factors (TFs) consist of one large gene family and are involved in the regulation of many developmental processes and various stresses. However, the functions of most of MYB TFs in woody plants remain unknown. Here, PtrMYB94, an R2R3 MYB TF from Populus trichocarpa, is characterized to be involved in the regulation of drought responses and abscisic acid (ABA) signaling. PtrMYB94 encodes a nuclear-localized R2R3 MYB TF. RT-PCR results showed that the PtrMYB94 transcripts were relatively abundant in leaves and stems, and were induced rapidly in response to dehydration stress. Overexpression of PtrMYB94 improved plant drought responses, suggesting that this MYB TF may functionally regulate poplar adaptability to drought stress. Furthermore, the analysis of transcriptional expression and PtrMYB94 promoter: GUS activity showed that PtrMYB94 responded to ABA induction. PtrMYB94-overexpressing plants exhibited the inhibition of seed germination compared with the wild-type (WT) control under ABA exposure condition. The ABA content was evidently increased in the PtrMYB94-overexpressing plants relative to the WT plants. In addition, transcript levels of several ABA- and drought-responsive genes, such as ABA1 and DREB2B, were up-regulated. Taken together, our results suggest that PtrMYB94 is involved in an ABA-dependent drought stress regulation in Populus.</AbstractText>
<CopyrightInformation>© The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.</CopyrightInformation>
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<Month>07</Month>
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<name sortKey="Jiang, Yuanzhong" sort="Jiang, Yuanzhong" uniqKey="Jiang Y" first="Yuanzhong" last="Jiang">Yuanzhong Jiang</name>
<name sortKey="Liu, Chi" sort="Liu, Chi" uniqKey="Liu C" first="Chi" last="Liu">Chi Liu</name>
<name sortKey="Luo, Keming" sort="Luo, Keming" uniqKey="Luo K" first="Keming" last="Luo">Keming Luo</name>
<name sortKey="Tang, Xiaowen" sort="Tang, Xiaowen" uniqKey="Tang X" first="Xiaowen" last="Tang">Xiaowen Tang</name>
<name sortKey="Wang, Haiyang" sort="Wang, Haiyang" uniqKey="Wang H" first="Haiyang" last="Wang">Haiyang Wang</name>
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