应用生态学报2011，Vol.22Issue(1)：66-72,7.
开花期低温胁迫对水稻花粉性状及剑叶理化特性的影响
Effects of low temperature stress during flowering period on pollen characters and flag leaf physiological and biochemical characteristics of rice
摘要
Abstract
Taking cold-tolerant rice cultivar 996 and cold-sensitive rice cultivar 4628 as test materials, a growth chamber experiment was conducted to investigate their pollen characters and flag leaf physiological and biochemical characteristics under the effects of low temperature stress.The plants were respectively treated with low temperature [19 ℃ (06:00-8:00; 19:00-23:00)/21 ℃ (08:00-10:00; 16:00-19:00)/23 ℃ ( 10:00-16:00)/17 ℃ (23:00-06:00)]and optimal temperature [24 ℃ (06:00-8:00; 19:00-23:00)/26 ℃ (08:00-10:00;16:00-19:00)/30 ℃ ( 10:00-16:00)/22 ℃ ( 23:00-06:00)]for seven days after heading.Low temperature stress decreased the anther dehiscence coefficient and pollen germination rate, as well as the sterile pollen rate of spikelets on middle and lower parts of panicles, with the anther dehiscence coefficient and pollen germination rate of cultivar 996 being significantly higher than those of cultivar 4628, indicating that cold-tolerant cultivar 996 had the capability to keep better pollination and pollen germination.Under low temperature stress, the flag leaf soluble protein and free proline contents and their increments of cultivar 996 were significantly higher than those of cultivar 4628, while the MDA content and relative conductivity and their increment were in adverse, indicating that cold-tolerant cultivar 996 had more quick and strong protective responses, and was able to keep stable membrane structure and function.关键词
水稻/低温胁迫/花粉粒性状/理化特性/剑叶分类
农业科技引用本文复制引用
邓化冰,车芳璐,肖应辉,唐文帮,盘毅,刘志贤,陈立云..开花期低温胁迫对水稻花粉性状及剑叶理化特性的影响[J].应用生态学报,2011,22(1):66-72,7.基金项目
湖南省博士后基金项目(2008RS4009)、湖南省自然科学基金项目(10JJ3091)和湖南农业大学作物种质创新与资源利用国家重点实验室培育基地开放基金项目(10KFXM10)资助. （2008RS4009）
