干旱地区农业研究2009，Vol.27Issue(4)：83-89,7.
偃麦草属植物种质材料不同耐盐群体生理指标分析
Analysis of physiological indexes variation for Elytrigia Desv.germplasm at different salt resistant colonies
摘要
Abstract
The simulating salinity stress method in green house was adopted, and the relati ve water content, the relative electrical conductivity rate(REC), the content of free proline(Pro), K+/Na+, the change rate of relative growth(RWC), the s alt-tolerant coefficient, the livability and the days of salinity injure to dea th of 34 germplasm and materials of 8 species of Elytrigia Desv. collected f rom 21 different countries were measured and analyzed at seedling stage, and th e above 8 index values at 0.9% NaCl concentration were analyzed using the Euclid ean Farthest Distance Cluster Method. The results showed that 34 germplasm and m aterials were classified into 3 salt tolerant colonies (classes), namely higher salt tolerant germplasm (HSTG), medium salt tolerant germplasm (MSTG) and sensit ive salt germplasm (SSG). And different variation trends and rules of the physio logical indexes of different salt tolerant Elytrigia Desv. germpalsm were sh owed, among them, REC, Pro and Na+ showed gradually increase but K+、K+/Na + and RWC showed gradually decrease, but when NaCl concentration was raised up to 1.2%, REC, Pro and Na+ were increased by 121.83%, 29.25 times and 145.45%; K+, K+/Na+ and RWC were decreased by 26.89%, 74.26% and 16.40% for the HS TG, respectively. However, REC, Pro and Na+ were increased by 199.20%, 75.45 t imes and 17.86%; K+, K+/Na+ and RWC were decreased by 43.16%, 93.55% and 2 7. 69% for the SSG, respectively. The increase and decrease scales of the MSTG were in the middle.关键词
偃麦草属/种质/耐盐性/生理指标Key words
Elytrigia Desv./germplasm/salt tolerance/phys iological indexes分类
农业科技引用本文复制引用
孟林,毛培春,张国芳..偃麦草属植物种质材料不同耐盐群体生理指标分析[J].干旱地区农业研究,2009,27(4):83-89,7.基金项目
国家自然科学基金项目(30571321) （30571321）
"十一五"国家重点科技支撑项目(2008BADB3B05) （2008BADB3B05）
北京市农林科学院常规育种财政专项 （）
北京市科技计划项目(Z09090501040902) （Z09090501040902）
