摘要
用不同浓度甜菜碱溶液对６个基因型小麦进行浸种和干旱后复水的试验，以幼苗反复干旱存活率高低作为幼苗抗旱性强弱的指标。结果表明，在第一次干旱后用５ｍｍｏｌ／Ｌ的甜菜碱溶液复水会明显提高小麦幼苗的相对含水量和抗旱性。基因型×处理的交互作用结果表明，不同基因型小麦对外源甜菜碱作用的反应有差异，用５ｍｍｏｌ／Ｌ和１５ｍｍｏｌ／Ｌ的甜菜碱溶液进行复水，会显著提高鲁麦１４幼苗的相对含水量和抗旱性。以较高浓度甜菜碱溶液（８０ｍｍｏｌ／Ｌ）浸种的小麦幼苗抗旱性差。
The exogenous betaines in different concentrations were used to soak 6 genotypes of winter wheat seeds and to rewater winter wheat seddlings after the first drought period. Percentage survivals of repeated drought were taken as criteria for seedling drought resistance of geno0types. The result showed that relative water content and the drought resistan of seedling were significantly improved by rewatering with 5 mmol/L betaine solution after the first drought period. The result of the genotype x treatment group showed significant differences for survival among genotypes of winter wheat in response to exogenous betaine. Relative water content and drought resistance of Lumai 14 seedlings were significantly improved by rewatering with 5 mmol/L betaine solutions. Drought resitance of seedlings soaked in 80 mmol/L betaine solution, the highest concentration in seed soaking, was poor.
出处
《干旱地区农业研究》
CSCD
北大核心
1998年第2期1-5,共5页
Agricultural Research in the Arid Areas
基金
国家"八五"攀登项目
关键词
小麦
幼苗
抗旱性
外源甜菜碱
winter wheat, seedling, exogenous betaine, drought resistance
