江西农业学报2017，Vol.29Issue(2)：18-23,6.DOI:10.19386/j.cnki.jxnyxb.2017.02.04
盐旱交叉胁迫对小麦种子萌发及幼苗保护酶活性的影响
Effects of Salt and Drought Cross Stress on Seed Germinat iona nd Pr otective Enzyme Activity of Wheat Seedling
摘要
Abstract
Wheat variety Shangmai 5226 was used as experimental material, different concentrations of PEG-6000 solution and NaCl solution were used to simulate different degrees of drought stress and salt stress respectively , and the coleoptile length, germination potential and germination rate of wheat seeds , as well as the protective enzyme activity of wheat seedlings under salt and drought cross stress were studied.The results showed that:under different degrees of salt and drought cross stress , along with the extension of stress time, the relative elongation rate of seed coleoptile was decreased in general, and the activity of superoxide dismutase (SOD) and peroxidase (POD) increased first and then decreased, while the activity of catalase (CAT) decreased first and then increased.When the concentration of PEG-6000 and NaCl solution increased, the coleoptile length, germination poten-tial and germination rate revealed a decreasing trend, while the activity of SOD, POD and CAT increased at first and then de-creased.We think that wheat seedlings have a cross adaptation to salt and drought cross stress , and moderate salt and drought stress can increase the adversity resistance of wheat.关键词
盐旱交叉胁迫/小麦/种子萌发/幼苗/保护酶活性Key words
Salt and drought cross stress/Wheat/Seed germination/Seedling/Protective enzyme activity分类
农业科技引用本文复制引用
华智锐,李小玲..盐旱交叉胁迫对小麦种子萌发及幼苗保护酶活性的影响[J].江西农业学报,2017,29(2):18-23,6.基金项目
陕西省科技厅项目（2011K01－18）。 （）
