关键词:谷子; CIPK基因; 逆境 Expression Analysis of Two CIPK genes under Abiotic Stress in Foxtail Millet YU Ai-Li1,2, ZHAO Jin-Feng1,2, WANG Gao-Hong2, DU Yan-Wei2, LI Yan-Fang2, ZHANG Zheng2, GUO Er-Hu2, LIANG Ai-Hua1,* 1Insitute of Biotechnology, Shanxi University, Taiyuan 030006, China
2 Millet Research Institute, Shanxi Academy of Agricultural Sciences / Shanxi Key Laboratory of Genetic Resources and Breeding in Minor Crops, Changzhi 046011, China
Fund:This study was supported by the grants from Natural Science Foundation of Shanxi Province (2015011071), the Key Laboratory Open Fund Project of Bio-engineering in Shanxi Provincial, and the Enhance Technology Independent Innovation Ability Project in Shanxi Academy of Agricultural Sciences (2015ZZCX-09) AbstractCIPK (CBL interacting protein kinase) is a type of serine or threonine protein kinases, which plays an important role in response to stress. In this study, we identified two CIPKgenes designated as SiCIPK6and SiCIPK16from foxtail millet ( Setaria italica) genome using bioinformatics methods. The sequence analysis showed that SiCIPK6 has a length of 1994 bp in the genome, encoding 513 amino acids residues, and SiCIPK16 is 1885 bp, encoding 473 amino acids residues. These two genes have no alternative splicing and intron. The characters predicted based on the bioinformatics analysis revealed that the protein sequences and structure of the two SiCIPK genes were very conservative just like CIPKgenes in other species. Real-time PCR analysis discovered that the expression of SiCIPK6 and SiCIPK16 was up-regulated by ABA, cold, heat, drought and salt stress, respectively. The expression was strongly induced by ABA, drought and salt treatments for SiCIPK6, and by cold, drought and heat treatments for SiCIPK16. The semi-quantitative PCR analysis showed that SiCIPK6 and SiCIPK16 were expressed at the jointing, booting and filling stages, and induced by drought stress in the corresponding growth period. Foxtail millet CIPKgenes reported in this study would enrich CIPK members in plant kingdom and provides important information for further elucidating the function and mechanisms of the CBL/CIPK network system responsive to stresses in foxtail millet.
Keyword:Foxtail millet; Calcineurin B-like-interacting protein kinase gene; Stress Show Figures Show Figures
图1SiCIPK6和SiCIPK16在ABA、低温、干旱、高温和盐处理下的Real-time PCR表达分析Fig. 1 Real-time PCR analysis of expression levels of the SiCIPK6andSiCIPK16under ABA, cold, dehydration, heat, and salt stresses treatments
图2SiCIPK6和SiCIPK16基因在不同生育期自然脱水胁迫下的表达分析Fig. 2 Electrophoretogram displaying the loading patterns for expression ofSiCIPK6 and SiCIPK16 under dehydration stresses in different growth periods
图3 SiCIPK6、SiCIPK16与其他已知CIPK氨基酸序列比对相同氨基酸残基用黑色表示, 相似氨基酸残基用灰色表示(≥ 60% similarity); 磷酸化或自磷酸化位点用星号表示。保守的激活环和C端调控域的NAF结构域用连字符标出。 The amino acids with an entire homology are shown by a black background, and those shared non-identical conserved identity by a gray background (≥ 60% similarity); Autophosphorylated or phosphorylated sites are marked with asterisk. The activation loop and the conserved NAF motif are marked with hyphens.Fig. 3 Sequences alignment of SiCIPK6, SiCIPK16 and other known CIPKs
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