TITLE

Genome-wide expression analysis of HSP70 family genes in rice and identification of a cytosolic HSP70 gene highly induced under heat stress

AUTHOR(S)
Jung, Ki-Hong; Gho, Hyun-Jung; Nguyen, Minh; Kim, Sung-Ryul; An, Gynheung
PUB. DATE
August 2013
SOURCE
Functional & Integrative Genomics;Aug2013, Vol. 13 Issue 3, p391
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The heat shock protein 70 (HSP70) gene family plays a key role in protecting plant cells or tissues from thermal or oxidative stress. Although many studies have elucidated the molecular functions of individual family members, genome-wide analysis of this family is still limited, especially for crop species. Our objective was to integrate various meta-profiling data into the context of a phylogenetic tree, which would enable us to perform fine evaluation of functional dominancy or redundancy within this family. Our data indicated that a loss-of-function mutant of a rice cytosolic HSP70 gene ( OsctHSP70-1) did not show a clear defective phenotype in response to high temperature because of the existence of another gene family member that was closely clustered with OsctHSP70-1 and had similar expression patterns. Moreover, the second gene showed much stronger anatomical expression. We indirectly analyzed the function of OsctHSP70-1 by studying GUS activity under the control of the endogenous promoter. We also designed a probable interaction network mediated by OsctHSP70-1 and used co-expression analysis among its components to refine the network, suggesting more probable model to explain the function of OsctHSP70-1.
ACCESSION #
89583588

 

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