水盐对银柴胡生长的调控机制研究

Stellaria dichotoma L. var. lanceolata Bge is among the most important and widely used medicinal plants in traditional Chinese medicine. Ningxia is major and genuine region of S.dichotoma. Wild S. dichotoma germplasm resources are to be extinguished due to much over excavation and exploitation. Fortunately, artificial cultivation of S. dichotoma in a large scale of growing areas has been an effective alterative strategh to produce and supply the medicinal plant. However, yield and quality is lower in cultivated S. dichotoma than in the wild plants. Drought and salt stress is the major factor affected the growth and yield of plants, while moderate drought and salt stress to increase pharmaceutical significant secondary compounds in plants. In this project, a pot experiment was carried out to determine the effect of drought and salt stress on growth, physiological biochemical character, yield ,the contents of the material compositions, active ingredients in roots, and further to study the relationship between yield, active ingredients and other index. Thus, the purpose was to exploring mechanism of drought and salt stress to increase quality of S. dichotoma. This study should provide research-based data for improving cultivation of S. dichotoma by increasing herbs quality.

中药银柴胡为多年生草本植物银柴胡（Stellaria dichotoma L. var.lanceolata Bge.）的干燥根，具清虚热、除疳热、降血脂、抗炎、抗动脉粥样硬化及抗过敏等作用，是我国的传统中药。宁夏是我国银柴胡的主产区和道地药材产区，目前银柴胡生产面临的主要问题是野生资源濒临灭绝，人工栽培银柴胡药材产量和质量低下。干旱和盐碱是影响药用植物产量和品质的重要限制因子，但适度的干旱和盐胁迫能刺激药用植物次生代谢产物的积累。本课题基于银柴胡自身具抗旱耐盐的生理特性，针对干旱荒漠半荒漠区土壤的水盐特性，通过盆栽和小区试验，研究在控盐控水条件下，水分、盐分及水盐互作对银柴胡生长状况、生理生化特性、物质组分、有效成分等的影响，揭示土壤水、盐及其互作对银柴胡药材质量的影响机制，为定向调控银柴胡栽培技术，稳定和提高栽培银柴胡药材质量，同时发挥其医疗保健、抗旱节水及生态保护的作用提供科学依据。