ALA对枣树盐胁迫的缓解效应及其作用机理研究

项目名称： ALA对枣树盐胁迫的缓解效应及其作用机理研究

项目编号： No.31460495

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 农业科学

项目作者： 孙军利

作者单位： 石河子大学

项目金额： 50万元

中文摘要： 新疆是我国最大的盐土区，同时也是红枣产业发展的优势区域，土壤盐分胁迫严重制约着红枣的生长发育及产量品质的提高，从而造成重大的经济损失。如何减轻盐胁迫环境对枣树的不良影响和提高枣树的抗逆性是当前新疆红枣产业的核心问题之一。因此，深入了解盐害机理，开展盐胁迫与枣树生长适应性关系的研究一方面是实现新疆红枣产业可持续发展的重要保障，另一方面从高效利用盐碱地、弃耕地角度来看亦具有十分积极的社会经济价值和生态现实意义。本项目通过外源ALA对耐盐性不同的枣树品种在盐胁迫下植株形态、细胞膜透性变化、叶绿素含量、脯氨酸含量、盐害指数、细胞超微结构、离子吸收和微域分布、酶活性等生理指标以及miRNA表达的变化及其对靶基因调控的研究，探索和阐明外源ALA对枣树盐胁迫的缓解效应与机理，以期为开发利用盐碱地、提高枣树生产力、合理获取盐碱地生态效益和经济效益发挥建设性作用。

中文关键词： 枣树；盐胁迫；5-氨基乙酰丙酸；缓解效应；调控机理

英文摘要： Xinjiang is the largest saline soil region in China,but at the same time it is an advantageous region for Zizyphus jujuba Mill, whose growth, development and the improvement of its quality of production is severely restricted by soil salinity stress, resulting in significant economic losses. How to mitigate the adverse effects of salt stressing environment of the jujube trees and to improve the jujube stress resistance is the core issue of Xinjiang's jujube industry. Therefore, in-depth understanding of salt damage mechanism and research on the relationship between salt threat and jujube tree growth and adaptability is, on the one hand, an important guarantee of realizing a sustainable development of red jujube industry in Xinjiang and, on the other hand, has a very positive social and economic value and ecological realities of significance from the perspective of highly efficient use of saline land and abandoned farmland. By probing into exogenous 5-Aminolevulinic acid (ALA) and its effectiveness on plant shape, cell membrane permeability, chlorophyll content, proline content, index of salt injury, cell ultrastructure, ion absorption and micro field distribution, enzyme activity ，the expression of miRNA and regulation of target gene with different salt tolerance of Zizyphus jujuba Mill. under salt stress in order to seek how exogenous 5-Aminolevulinic acid(ALA) actually works to alleviate salt stress, this research project hopes to play a constructive role to develop and utilize the saline-alkali soil, to improve productivity of Zizyphus jujuba Mill. And to gain reasonable ecological and economical benefit from out of the saline-alkali fields.

英文关键词： Zizyphus jujube Mill;salt stress;5-Aminolevulinic acid;Alleviative effect;regulation mechanism