Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system.

Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system. Research Abstract Details 

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Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system. Abstract Text:

Takumi Yoshida,Yoh Sakuma,Daisuke Todaka,Kyonoshin Maruyama,Feng Qin,Junya Mizoi,Satoshi Kidokoro,Yasunari Fujita,Kazuo Shinozaki,Kazuko Yamaguchi-Shinozaki,

A transcription factor DREB2A functions as a key regulator not only in drought stress responses but also in heat stress (HS) responses, and activates expression of many abiotic stress-responsive-genes involved in drought and HS tolerance. HsfA3 is one of the most up-regulated heat-inducible genes in transgenic plants overexpressing DREB2A. In this study, the analyses of HsfA3 expression profile and the transactivation analysis of HsfA3 showed that the expression of HsfA3 was directly regulated by DREB2A under HS. Microarray analysis using transgenic plants overexpressing HsfA3 also showed that overexpression of HsfA3 induces many heat-inducible genes. Furthermore, we showed that thermotolerance of the HsfA3 overexpressors was increased, and that of the hsfA3 T-DNA tagged mutants was decreased. These results indicate that HsfA3 regulates expression of many heat-inducible genes in the transcriptional cascade downstream of the DREB2A stress-regulatory system and functions in acquisition of thermotolerance under the control of the DREB2A cascade.

Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system. Publishing Authors By Initials

T Yoshida,Y Sakuma,D Todaka,K Maruyama,F Qin,J Mizoi,S Kidokoro,Y Fujita,K Shinozaki,K Yamaguchi-Shinozaki,

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Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Biochemical and biophysical research communication

VOLUME: 368

Page Numbers: 515-21

Journal Abbreviation: Biochem. Biophys. Res. Commun.

ISSN: 1090-2104

DAY: 7

MONTH: 02

YEAR: 2008

Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system. Information

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LANGUAGE: eng

NlmUniqueID: 372516

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Grant and Affiliation Information for Functional analysis of an Arabidopsis heat-shock transcription factor HsfA3 in the transcriptional cascade downstream of the DREB2A stress-regulatory system.

AFFILIATION: Laboratory of Plant Molecular Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.

Country: United States

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MEDLINETA: Biochem Biophys Res Commun

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