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Arabidopsis casein kinase 1-like 2 involved in abscisic acid signal transduction pathways
[摘要] In this study, we isolated a homozygous T-DNA insertion mutant line, ckl2 , of the casein kinase 1-Like 2 ( CKL2 ) gene in Arabidopsis thaliana . Through analysis of the germination ratio, root length, water loss rate, and stomatal aperture, we found that the ckl2 mutants showed an abscisic acid (ABA)-hyposensitive phenotype in all tests. CKL2 was also found to mediate the expression of ABA-upregulated genes in seeds and seedlings. CKL2 was expressed in all tissues, especially in the leaf and leaf stalk, and could be induced by ABA. A proline accumulation experiment showed that the Pro content in ckl2 was lower than that of the wild type. The above results demonstrate that CKL2 was required for ABA-regulated seed germination, root growth, and gene expression, suggesting that CKL2 positively mediates ABA signaling in Arabidopsis .
[发布日期]  [发布机构] 
[效力级别]  [学科分类] 纳米科学和纳米技术
[关键词] Arabidopsis;CKL2 gene;phenotype;ABA signal transduction [时效性] 
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