| 玉米ZmCIPK24-2基因在盐胁迫应答中的功能研究 |
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| 基金项目： | National Key Research and Development Program of China(2016YFD0101002);Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences |
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| 摘 要： | 土壤盐化会影响作物正常生长发育,导致农作物减产。植物在长期适应环境的过程中,进化出了相应的耐盐分子机制。钙调磷酸酶B类蛋白(CBL)及CBL互作蛋白激酶(CIPK)参与植物对盐胁迫的响应。本研究鉴定到一个拟南芥AtSOS2的同源基因ZmCIPK24-2,实时荧光定量聚合酶链式反应结果表明ZmCIPK24-2基因在玉米各组织部位广泛表达,其中在花粉表达量最高;ZmCIPK24-2受盐胁迫诱导表达。ZmCIPK24-2能部分互补拟南芥atsos2突变体的盐敏感表型,在高盐浓度下转基因株系比atsos2突变体的存活率显著提高,根长显著增长。亚细胞定位实验表明ZmCIPK24-2定位于细胞质、细胞膜与核膜。利用酵母双杂交实验及LUC互补成像实验发现ZmCIPK24-2与玉米CBLs家族中的ZmCBL1、ZmCBL4、ZmCBL8和ZmCBL9互作。本研究为解析玉米CBL-CIPK信号通路的功能提供了新的实验证据。
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| 收稿时间： | 2020-02-06 |
Functional analysis of ZmCIPK24-2 gene from maize in response to salt stress |
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| Authors: | LI Jian WANG Yi-Ru ZHANG Ling-Xiao SUN Ming-Hao QIN Yang ZHENG Jun |
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| Institution: | 1. College of Agronomy, Jilin Agricultural University, Changchun 130118, Jilin, China;2. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China;3. College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, China |
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| Abstract: | Soil salinity affects the normal growth and development of crops, resulting in reduced crop yields. In the process of long-term adaptation, plants have evolved targeted salt-resistant molecular mechanisms. The calcineurin B-like protein (CBL) and CBL-interaction protein kinase (CIPK) are involved in plant response to salt stress. In this study, we identified an AtSOS2 homologous gene ZmCIPK24-2. The results of real time-qPCR showed that ZmCIPK24-2 gene was ubiquitously expressed in maize, especially in pollen, and was induced by salt stress. It was found that ZmCIPK24-2 could partially complement the salt-sensitive phenotype of the atsos2 mutant. The survival rate and the root length of ZmCIPK24-2-overexpressed lines were significantly increased compared with atsos2 mutant under high salt concentration. Subcellular localization experiments showed that ZmCIPK24-2 was localized in cytoplasm, cell membrane, and nuclear membrane. Yeast two-hybrid experiments and LUC complementation imaging assays showed that ZmCIPK24-2 was interacted with ZmCBL1, ZmCBL4, ZmCBL8, and ZmCBL9, respectively. This study provides a new experimental evidence for the functional analysis of CBL-CIPK signaling pathway in maize. |
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| Keywords: | CIPK CBL salt tolerance maize |
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