草业科学2017，Vol.34Issue(3)：539-546,8.DOI:10.11829/j.issn.1001-0629.2016-0173
饲草型小黑麦苗期抗旱指标的筛选
Screening on the drought resistance index and conditions for × Triticale Wittmack at the seedling stage
摘要
Abstract
The effects of drought stress on)× Triticale Wittmack seedlings were assessed in order to the develop simulation conditions for determining drought resistance.In order to do this,the hypertonic solution polyethylene glycol (PEG-6000) was used to simulate physiological drought.Indices including water content,relative water content and conductivity,the content of malondialdehyde,chlorophyll a and b,carotenoids,soluble sugar and free proline in leaves were determined.The results showed that 30％ PEG treatment for 28 days was an optimal simulation.At significant differences existed for most parameters determined in this study compared with the controls.We also found that the physiological indexes suitable for determining × Triticale Wittmack success at the seedling stage were water content,relative water content,and levels of malondialdehyde,chlorophyll b,and proline in leaves.After drought stress,× Triticale Wittmack seedlings grew slowly,and the contents of water,relative water and chlorophyll in leaves decreased,but the content of free proline and MDA increased关键词
饲草型小黑麦/PEG浓度/生理生化指标/干旱胁迫/模拟条件/抗旱鉴定/指标筛选Key words
× Triticale Wittmack/PEG concentration/physiological biochemical indexes/drought stress/simulation conditions/drought resistance identification/index screening分类
农业科技引用本文复制引用
李雪,田新会,杜文华..饲草型小黑麦苗期抗旱指标的筛选[J].草业科学,2017,34(3):539-546,8.基金项目
国家自然科学基金(31360577) （31360577）
教育部博士点基金(20136202110005) （20136202110005）
现代农业产业技术体系建设专项资金(CARS-40-09B) （CARS-40-09B）
