作物学报2012，Vol.38Issue(9)：1734-1742,9.DOI:10.3724/SP.J.1006.2012.01734
开花期低温胁迫对四川攀西稻区水稻开花结实的影响
Effects of Low Temperature Stress during Flowering Stage on Flowering and Seed Setting of Rice in Panxi Region, Sichuan Province
摘要
Abstract
An experiment was conducted in growth chamber with low temperature treatments during flowering stage using three indica and three japonica rice varieties (combinations) to study the effects of low temperature stress on flowering and setting. The results showed that there were different responses and characteristics of flowering, anther, pollen, setting, and their relationship between indica and japonica to low temperature stress during flowering stage. The conventional japonica rice had high cold tolerance to low temperature. In comparison with control, the reduction range of the anther volume, anther dehiscence rate, pollen fertility rate, pollen number on stigma and germination rate of pollen on stigma of indica rice varieties (combinations) under low temperature stress was larger than that of japonica rice varieties (combinations). Under low temperature stress during flowering stage, the reduction range of yield components of indica rice varieties (combinations) was greater than that of japonica rice varieties (combinations). The correlation analysis showed a close relation between the seed setting of rice and the main characters of anther and pollen. It is clear that low temperature stress affects the development and maturation of anther and pollen, further blocks anther dehiscence, resulting in insufficient pollen dissemination on stigma. Meanwhile, low temperature stress also reduces pollen viability and germination ability, and directly affects fertilization and seed setting, which is one of the major reasons for reducing seed setting rate.关键词
籼稻/粳稻/低温/开花期/开花/结实Key words
Indica rice/Japonica rice/Low temperature/Flowering period/Flowering/Seed setting引用本文复制引用
张荣萍,马均,蔡光泽,孙永健..开花期低温胁迫对四川攀西稻区水稻开花结实的影响[J].作物学报,2012,38(9):1734-1742,9.基金项目
本研究由四川省教育厅青年基金项目"攀西高原稻区籼、粳稻耐冷性生理研究"(09ZB076)资助. （09ZB076）
