河南农业科学2012，Vol.41Issue(3)：21-25,5.
小麦苗期根系抗低温能力研究
Study on Cold Resistance of Wheat Root at Seedling Stage
摘要
Abstract
In this study,cold resistant characters of seedling root system of 10 wheat varieties popularly cultivated in Huanghuai wheat area were analyzed under low temperature from 0 °C to - 10 °C , which was also compared with the naturally cold injury in field. The results in two years indicated that the cold resistant abilities of different cultivars showed no difference under 0 °C ?but they were obviously different under - 5 *C in 2007 - 2008 and - 2 "C , - 4 V and -6 °C in 2008-2009. Among the 10 varieties,Bainong Aikang 58,Handan 6172 and Bainong 160 showed stronger cold resistance than the others. But cold injury seriously occurred in all the cultivars under low temperature from -8 °C to -10 °C ,with the highest leaf mortality rate of 100%. Under the natural conditions( -8 °C and -10 °C),the mortality rate of aerial parts(leaves) was only 0. I%~ 9. 2% ,just equivalent to the cold injury of roots under -2 °C. Wheat roots were more susceptible to low temperature than leaves, suggesting that the cold resistance of wheat roots was weaker than that of leaves,so it was of especial importance to study on the cold resistance of wheat roots.关键词
小麦/苗期/根系/抗低温能力/冻害Key words
wheat/ seedling stage,- root system/ cold resistance/ cold injury分类
农业科技引用本文复制引用
李淦,董娜,胡海燕,李小利,张立琳,茹振钢..小麦苗期根系抗低温能力研究[J].河南农业科学,2012,41(3):21-25,5.基金项目
河南省重大科技专项项目(081100110200) （081100110200）
