Promoters of Arabidopsis Casein kinase I-like 2 and 7 confer specific high-temperature response in anther

Plant Molecular Biology
Yaoyao LiLongfu Zhu

Abstract

KEY MESSAGE: (1) We systematically analyze the promoter activities of AtCKLs in various tissues; (2) AtCKL2 and AtCKL7 were expressed in early developmental anthers under high temperature (HT) conditions; (3) AtMYB24 may function as a positive regulator of AtCKL2 and AtCKL7 expression under HT. High temperature (HT) can seriously impede plant growth and development, causing severe loss of crop production. In Arabidopsis, AtCKL genes show high similarity to GhCKI, a gene reported to disrupt tapetal programmed cell death in cotton. However, most of AtCKL genes are not well characterized. Here, we systematically analyzed the expression patterns of AtCKLs in various tissues. The expression of AtCKL2 and AtCKL7 was induced in early anther development under HT, which is similar to the case of GhCKI. In silico analysis of AtCKL2 and AtCKL7 promoters indicated that four types of transcription factors (TFs) (MADS, NAC, WRKY and R2R3-MYB) might bind to AtCKL2 and AtCKL7 promoters. Furthermore, three MADS, three NAC, one WRKY, and three R2R3-MYB TFs were up-regulated in stage 1-8 anthers and three R2R3-MYB TFs were up-regulated in stage 9-10 anthers under HT, implying the important roles of R2R3-MYB genes in the response of anthers to HT....Continue Reading

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Datasets Mentioned

BETA
GSE5633
GSE5634

Methods Mentioned

BETA
transgenic
one-hybrid
PCR
Assay

Software Mentioned

MEGA5
JASPAR
CLUSTALX

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