西北林学院学报2011，Vol.26Issue(6)：18-23,6.
黄土高原3种优势种对干旱胁迫的生理响应及其抗旱性评价
Responses and Drought Resistance of Three Dominant Species to Soil Water Stress from Loess Hilly Region
摘要
Abstract
Physiological variations and drought resistance were studied of three dominant species, Melilotus alba, Salix cheilophila and Hedysarum scoparium exposed to different soil water contents (75%? 55%, and 35% , respectively). Responses to the droughts of the three species were evaluated by monitoring variations of the relative water content (RWC), the water preserving capacity, the activities of protective enzyme (SOD, CAT, and POD respectively),the contents of malondialdehyde (MDA), the contents of su-peroxide anion and the soluble protein content. The results showed both RWC and the water preserving capacity of the three species decreased as the increase of draught stress. The activities of protective enzymes, the content of MDA, superoxide anion and the soluble protein increased in varying degrees. Taking all these indices into consideration and using the subjection function analysis, the capacity of drought resistance of three dominant species can be evaluated as follows: Hedysarum scoparium~>Salix cheilophila ^>Melilotus alba.关键词
优势种/抗旱性/隶属函数法/综合评价Key words
dominant species/ drought resistance/ subordinate function/ comprehensive evaluation分类
农业科技引用本文复制引用
田胄,左小容,梁宗锁..黄土高原3种优势种对干旱胁迫的生理响应及其抗旱性评价[J].西北林学院学报,2011,26(6):18-23,6.基金项目
中国科学院重要方向项目资助(KZCX2-YW-443):科技部”十一五”支持计划(2008BAD98B08) （KZCX2-YW-443）
