摘要
[ Objective] To evaluate drought resistance of siberian wildrye （ Elymus sibiricus） from different producing areas. [ Method] Germplasm materials of siberian wildrye from Xinjiang （E01）, Gansu （E02）, Beijing （E03）, Shanxi （E04） and Qinghai （E05） were used as experimental materials and treated under continuous drought stress. The external morphology of their leaves was observed. On Day 0, 5 and 10, the dynamic variations of relative conductivity, malondialdehyde （MDA） content, chlorophyll content, soluble sugar content and proline content were determined. Subordinate function values analysis was performed to evaluate their drought resistance comprehensively. [ Result] Under continuous drought stress, the experimental siberian wildrye showed different extemal morphology of leaves. With increasing intensity and extending time of drought stress, the chlorophyll content increased significantly （P 〈 0.05）, and its differences between the siberian wildrye from different producing areas were significant （ P 〈 0.05） ; the relative electrical conductivity, malondialdehyde （MDA） content, soluble sugar content and proline content decreased significantly （P 〈 0.05）, and their differences between the siberian wildrye from different producing areas were significant （P 〈 0.05）. [Conclusion] The drought resistance of E04, E05, E01, E03 and E02 declines successively.
[ Objective] To evaluate drought resistance of siberian wildrye （ Elymus sibiricus） from different producing areas. [ Method] Germplasm materials of siberian wildrye from Xinjiang （E01）, Gansu （E02）, Beijing （E03）, Shanxi （E04） and Qinghai （E05） were used as experimental materials and treated under continuous drought stress. The external morphology of their leaves was observed. On Day 0, 5 and 10, the dynamic variations of relative conductivity, malondialdehyde （MDA） content, chlorophyll content, soluble sugar content and proline content were determined. Subordinate function values analysis was performed to evaluate their drought resistance comprehensively. [ Result] Under continuous drought stress, the experimental siberian wildrye showed different extemal morphology of leaves. With increasing intensity and extending time of drought stress, the chlorophyll content increased significantly （P 〈 0.05）, and its differences between the siberian wildrye from different producing areas were significant （ P 〈 0.05） ; the relative electrical conductivity, malondialdehyde （MDA） content, soluble sugar content and proline content decreased significantly （P 〈 0.05）, and their differences between the siberian wildrye from different producing areas were significant （P 〈 0.05）. [Conclusion] The drought resistance of E04, E05, E01, E03 and E02 declines successively.
基金
supported by the Project of Conservation and Utilization of Forage Germplasm Resources in the Tibetan Plateau ( the Ministry of Agriculture of China,070401)
Earmarked Fund for Modern Agro-industry Technology Research System
