Posted by: shrikantmantri | April 13, 2010

Two Closely Related Subclass II SnRK2 Protein Kinases Cooperatively Regulate Drought-Inducible Gene Expression.

Plant Cell Physiol. 2010 Apr 7. [Epub ahead of print]

Two Closely Related Subclass II SnRK2 Protein Kinases Cooperatively Regulate Drought-Inducible Gene Expression.

Mizoguchi MUmezawa TNakashima KKidokoro STakasaki HFujita YYamaguchi-Shinozaki KShinozaki K.

RIKEN Plant Science Center, 3-1-1, Kouyadai, Tsukuba, Ibaraki 305-0074, Japan.

Abstract

The subclass III group of SNF1-related protein kinase 2 (SnRK2) members is known to play an important role in ABA and osmotic stress signaling in Arabidopsis, however, roles of other subclasses are remained to be elusive. Here, we established a double mutant of SRK2C/SnR2.8 and SRK2F/SnRK2.7 to investigate functions of subclass II SnRK2s. Microarray analysis suggested that subclass II SnRK2s regulate some of drought-responsive genes involving AREB/ABF-type transcription factors and their targets, and quantitative RT-PCR confirmed those genes were down-regulated significantly in srk2cf. This study indicates that subclass II SnRK2s also play important roles in drought stress signaling in Arabidopsis.

Posted via email from Sharing significant bytes —(Shrikant Mantri)

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