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Constitutive expression of the poplar WRKY transcription factor PtoWRKY60 enhances resistance to Dothiorella gregaria Sacc. in transgenic plants.

Identifieur interne : 002305 ( Main/Exploration ); précédent : 002304; suivant : 002306

Constitutive expression of the poplar WRKY transcription factor PtoWRKY60 enhances resistance to Dothiorella gregaria Sacc. in transgenic plants.

Auteurs : Shenglong Ye [République populaire de Chine] ; Yuanzhong Jiang [République populaire de Chine] ; Yanjiao Duan [République populaire de Chine] ; Abdul Karim [République populaire de Chine] ; Di Fan [République populaire de Chine] ; Li Yang [République populaire de Chine] ; Xin Zhao [République populaire de Chine] ; Jia Yin [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

RBID : pubmed:25281841

Descripteurs français

English descriptors

Abstract

WRKY proteins are involved in various physiological processes in plants, especially in coping with diverse biotic and abiotic stresses. However, limited information is available on the roles of specific WRKY transcription factors in poplar defense. In this study, we reported the characterization of PtoWRKY60, a Group IIa WRKY member, from Populus tomentosa Carr. The gene expression profile of PtoWRKY60 in various tissues showed that it significantly accumulated in old leaves. Phylogenetic analyses revealed that PtoWRKY60 had a close relationship with AtWRKY18, AtWRKY40 and AtWRKY60. PtoWRKY60 was induced mainly by salicylic acid (SA) and slightly by Dothiorella gregaria Sacc., jasmonic acid, wounding treatment, low temperature and salinity stresses. Overexpression of PtoWRKY60 in poplar resulted in increased resistance to D. gregaria. The defense-associated genes, such as PR5.1, PR5.2, PR5.4, PR5.5 and CPR5, were markedly up-regulated in transgenic plants overexpressing PtoWRKY60. These results indicate that PtoWRKY60 might be partly involved in the signal transduction pathway initiated by SA in Populus.

DOI: 10.1093/treephys/tpu079
PubMed: 25281841


Affiliations:


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Le document en format XML

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<name sortKey="Yang, Li" sort="Yang, Li" uniqKey="Yang L" first="Li" last="Yang">Li Yang</name>
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<name sortKey="Zhao, Xin" sort="Zhao, Xin" uniqKey="Zhao X" first="Xin" last="Zhao">Xin Zhao</name>
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<nlm:affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, No. 2, Tiansheng Road, Beibei, Chongqing 400715, China.</nlm:affiliation>
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<term>Ascomycota (MeSH)</term>
<term>Cold Temperature (MeSH)</term>
<term>Cyclopentanes (pharmacology)</term>
<term>Disease Resistance (MeSH)</term>
<term>Evolution, Molecular (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Organ Specificity (MeSH)</term>
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<term>Cold Temperature</term>
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<div type="abstract" xml:lang="en">WRKY proteins are involved in various physiological processes in plants, especially in coping with diverse biotic and abiotic stresses. However, limited information is available on the roles of specific WRKY transcription factors in poplar defense. In this study, we reported the characterization of PtoWRKY60, a Group IIa WRKY member, from Populus tomentosa Carr. The gene expression profile of PtoWRKY60 in various tissues showed that it significantly accumulated in old leaves. Phylogenetic analyses revealed that PtoWRKY60 had a close relationship with AtWRKY18, AtWRKY40 and AtWRKY60. PtoWRKY60 was induced mainly by salicylic acid (SA) and slightly by Dothiorella gregaria Sacc., jasmonic acid, wounding treatment, low temperature and salinity stresses. Overexpression of PtoWRKY60 in poplar resulted in increased resistance to D. gregaria. The defense-associated genes, such as PR5.1, PR5.2, PR5.4, PR5.5 and CPR5, were markedly up-regulated in transgenic plants overexpressing PtoWRKY60. These results indicate that PtoWRKY60 might be partly involved in the signal transduction pathway initiated by SA in Populus. </div>
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<DateCompleted>
<Year>2015</Year>
<Month>08</Month>
<Day>24</Day>
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<DateRevised>
<Year>2014</Year>
<Month>11</Month>
<Day>21</Day>
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<ISSN IssnType="Electronic">1758-4469</ISSN>
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<Volume>34</Volume>
<Issue>10</Issue>
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<Year>2014</Year>
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<Title>Tree physiology</Title>
<ISOAbbreviation>Tree Physiol</ISOAbbreviation>
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<ArticleTitle>Constitutive expression of the poplar WRKY transcription factor PtoWRKY60 enhances resistance to Dothiorella gregaria Sacc. in transgenic plants.</ArticleTitle>
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<AbstractText>WRKY proteins are involved in various physiological processes in plants, especially in coping with diverse biotic and abiotic stresses. However, limited information is available on the roles of specific WRKY transcription factors in poplar defense. In this study, we reported the characterization of PtoWRKY60, a Group IIa WRKY member, from Populus tomentosa Carr. The gene expression profile of PtoWRKY60 in various tissues showed that it significantly accumulated in old leaves. Phylogenetic analyses revealed that PtoWRKY60 had a close relationship with AtWRKY18, AtWRKY40 and AtWRKY60. PtoWRKY60 was induced mainly by salicylic acid (SA) and slightly by Dothiorella gregaria Sacc., jasmonic acid, wounding treatment, low temperature and salinity stresses. Overexpression of PtoWRKY60 in poplar resulted in increased resistance to D. gregaria. The defense-associated genes, such as PR5.1, PR5.2, PR5.4, PR5.5 and CPR5, were markedly up-regulated in transgenic plants overexpressing PtoWRKY60. These results indicate that PtoWRKY60 might be partly involved in the signal transduction pathway initiated by SA in Populus. </AbstractText>
<CopyrightInformation>© The Author 2014. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.</CopyrightInformation>
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<Year>2014</Year>
<Month>10</Month>
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<Country>Canada</Country>
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