叶绿体镁转运蛋白OsCMT1调控水稻镁利用效率的分子机制

项目名称： 叶绿体镁转运蛋白OsCMT1调控水稻镁利用效率的分子机制

项目编号： No.31672218

项目类型： 面上项目

立项/批准年度： 2017

项目学科： 农业科学

项目作者： 陈志长

作者单位： 福建农林大学

项目金额： 25万元

中文摘要： 镁是植物生长和发育的必需营养元素之一，在光合过程中发挥至关重要的作用。随着化肥的大量施用以及复种指数的不断提高，作物缺镁问题日益突出。增强作物对镁离子的转运，尤其是镁向叶绿体的转运，是提高作物镁利用效率最为有效的途径之一。我们前期通过水稻镁敏感突变体的筛选，克隆到位于叶绿体膜上、负责镁向叶绿体转运的蛋白基因OsCMT1 (Chloroplast-localized Magnesium Transporter 1)。本研究首先将从生理、生化及分子层面，系统研究OsCMT1转运镁的生物学功能，解析镁在叶绿体中的运输机制，预期研究成果将为选育镁高效和高产的作物品种提供理论基础。

中文关键词： 大量元素；养分高效；养分转运；基因功能；分子机制

英文摘要： Magnesium (Mg) is a macronutrient essential for plant growth, which plays an especially important role in photosynthesis. Recently, with tremendous input of chemical fertilizers and increasing multi-cropping, plants are suffering Mg deficiency more prominently on the soil. Enhancing transport of Mg into plant especially into chloroplast could be the most effective way to increase Mg use efficiency in crop. Based on the previous work on screening of Mg hypersensitive mutants, we cloned a gene named OsCMT1 (Chloroplast-localized Magnesium Transporter 1), which encoded protein was localized at chloroplast envelope membrane system and was thought to be involved in Mg transport into chloroplast. In this study, we plan to clarify the mechanism for Mg transport in chloroplast through functional characterization of Mg transporter OsCMT1 from physiological, biochemical and molecular aspect. This study will provide the theoretical base for breeding cultivars with both high Mg use efficiency and high yield.

英文关键词： Macronutrient;High nutrient efficiency ;Nutrient transport;Gene function;Molecular mechanisms