硅提高盐胁迫下甘草药材产量和甘草酸含量的潜力及机制研究

项目名称： 硅提高盐胁迫下甘草药材产量和甘草酸含量的潜力及机制研究

项目编号： No.31260304

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 农业科学

项目作者： 张新慧

作者单位： 宁夏医科大学

项目金额： 53万元

中文摘要： 甘草为大宗传统中药材，年需求量居诸药之首，野生资源主要分布于我国宁夏、甘肃、内蒙等西部的荒漠半荒漠地区。目前其资源危机已威胁到中药产业和西北地区的生态安全，因此如何在西北大面积盐渍化土壤发展甘草种植、提高土地利用率已成为亟待解决的问题。本项目针对盐胁迫提高甘草酸含量的同时不能兼顾产量的问题，基于环境友好型元素硅有提高植物抗盐能力的特性，拟采用水培试验研究硅对盐胁迫下甘草种子萌发出苗、幼苗生长的促进效应及其生理生化机制；采用盆栽试验研究硅对盐胁迫下成药期甘草生长及产量、生理生化特性、主要次生代谢产物、初生代谢产物的影响，通过相关、通径等分析方法解析产量和甘草酸与其它各指标及硅浓度间的关系，揭示硅提高盐胁迫下甘草产量和甘草酸含量的潜力，阐明硅调控盐胁迫下甘草生长和甘草酸生物合成与积累的机制，确定不同程度盐胁迫下兼顾甘草产量和质量的需硅量，为甘草在西北大面积盐渍化土壤的高产优质栽培提供科学依据。

中文关键词： 乌拉尔甘草；产量和品质；硅；盐胁迫；生理生化特性

英文摘要： Glycyrrhiza uralensis Fisch. is among the most important and widely used medicinal plants in traditional Chinese medicine, which is mainly distributed in desert and semi-desert area of northwest China. At present, the resource shortage has affected the sustainable development of traditional Chinese medicine industry and the ecological safety of northwest area in China. Therefore, it has become a hot topic that how to stabilize and improve the yield and quality of G.uralensis cultivated in the saline soil in northwest China. However, recent studies showed that salinity stress increased the relative content of glycyrrhizic acid in root, but significantly inhibited plant growth and yield of G.uralensis, which result in the absolute content of glycyrrhizic acid in root was significantly reduced under salinity sterss condition. it is extremely important to find ways to improve salt tolerance of G.uralensis. To ensure traditonal Chinese medicine industry security and sustainable economy, it is extremely important to find ways to improve salt tolerance of G.uralensis. Silicon (Si) is the most abundant element in the earth's crust after oxygen. As an environment friendly element, Si is known to ameliorate the deleterious effects of salt on plant growth. The present study aims to improvement of G.uralensis production un

英文关键词： Glycyrrhiza uralensis；yield and quality；exogenous silicon；salt stress；physiological-biochemical characteristic