棉花学报2009，Vol.21Issue(6)：492-496,5.
三个不同耐高温棉花基因型主茎叶的生理生化特征
Physiological and Biochemical Characteristics of Main-stem Leaves among Three Cotton Genotypies with Varying High-temperature Tolerance
摘要
Abstract
A comparative investigation on the physiological and biochemical characteristics and their fluctuation in main stem leaf of cotton lines with different tolerance to high temperature stress was presented in the paper. The results showed that the leaf cell membrane thermo-stability (CMT) was significantly stronger in tolerant line HLY than susceptible line TS18 during the whole growth period and moderately susceptible line XYM68 at peak flowering and boll-setting stages. Of the three differentially tolerant lines, the proline content was different significantly with each other at all stages except for seedling, the soluble sugar content became significantly different at peak flowering and boll-setting stages, while there was nearly no change for dissolvable protein content during the whole developmental period. The chlorophyll content was higher in tolerant line HLY than susceptible counterparts XYM68 and TS18 at peak flowering and boll-setting stages and HLY owned the highest net photosynthetic rate at all of the four stages. The tolerant cotton line may be distinguished from susceptible ones by the CMT, proline, soluble sugar content and net photosynthetic rate traits in main stem leaf, which can be used as a measure of high temperature tolerance in cotton breeding program.关键词
棉花/高温耐性/主茎功能叶/生理生化特性Key words
cotton/ high-temperature stress tolerance/ functional leaf on main stem/ physiological and biochemical characteristics分类
农业科技引用本文复制引用
袁小玲,熊格生,邓茳明,吴锋,刘志..三个不同耐高温棉花基因型主茎叶的生理生化特征[J].棉花学报,2009,21(6):492-496,5.基金项目
国家自然科学基金项目(30900909),湖南省教育厅优秀青年科研项目(08B033) （30900909）
