水稻CIPK基因家族的鉴定及OsCIPK5受稻瘟病菌诱导的qRT-PCR分析

Identification of CIPK Family in Rice and qRT-PCR Analysis on OsCIPK5 Induced by Magnaporthe oryzae

【目的】植物通过启动一系列信号传导过程来应对外部环境,这些过程通常涉及多种蛋白激酶,包括钙调神经磷酸酶B样蛋白互作激酶(calcineurin B-like protein-interacting protein kinases, CIPKs)。为更加清晰全面地了解水稻CIPK基因家族,本研究根据最新的基因组测序数据对水稻基因组中的CIPKs进行了鉴定。【方法】通过探讨拟南芥和水稻中CIPKs蛋白家族的结构特点,结合生物信息学和qRT-PCR技术系统分析水稻中CIPKs家族蛋白的结构。结合转录组数据,比较了粳稻云引受稻瘟病菌诱导后的表达情况。【结果】根据最新的水稻基因组数据,鉴定出31个水稻OsCIPK基因。系统发育树分析结果表明,31个OsCIPK基因可分为5个亚家族,这些亚家族具有不同的外显子-内含子和UTR的结构特点。从广谱抗稻瘟病品种粳稻云引受稻瘟病菌诱导的基因表达谱的趋势聚类中筛选出了OsCIPK5基因并对其进行了表达分析,结果表明,云引中OsCIPK5基因受稻瘟病菌的诱导表达。【结论】内含子缺失和片段重复在水稻OsCIPK基因家族的扩展中起到重要作用,同时OsCIPK5受到稻瘟病菌的诱导表达。

【Objective】 The family of calcineurin B-like protein-interacting protein kinase genes(CIPKs) in rice was studied using the latest sequencing data to further understand the signal transduction involving a variety of kinases in plants in respond to environmental changes. 【Methods】 The structures of CIPKs in Arabidopsis thaliana and rice were analyzed. Combining the bioinformatics and qRT-PCR technology, expressions of the CIPK familie and that of the genes induced by M. grisea in Japonica rice cv. ’Yunyin’ were compared. 【 Results】 A total of 31 OsCIPK genes were identified in the rice genome databank. The phylogenetic tree analysis showed that these 31 OsCIPKs could be divided into 5 subfamilies, which had different structural characteristics of exon-intron and UTR. The expression of OsCIPK5, which was selected from a trend cluster of the gene expressiong profile of ’Yunyin’ induced by M. grisea, could be induced by M. grisea. 【Conclusions】 It appeared that the intron deletion and fragment duplication played an important role in the expansion of OsCIPK family in rice,and that OsCIPK5 expression was induced in ’Yunyin’ by M. grisea.