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作 者 ：黄福灯, 曹珍珍, 李春寿, 陆艳婷, 潘刚, 程方民

期 刊 ：核农学报 2016年 30卷 3期 页码：565-570

关键词：水稻；高温；花器官；钱江3号B；

Keywords:rice, high-temperature, floral organ, Qianjiang 3 B,

摘 要 ：为探讨花期高温对水稻花粉育性的生理生态影响,以耐热品种钱江3号B与热敏感品种协青早B为材料,在花期进行不同方式的高温胁迫处理,比较分析了花期高温对水稻花粉粒直径、花粉活力、结实率等的影响。结果表明,与适温处理相比,高温胁迫对钱江3号B的花粉活力、花药开裂率和开裂孔长度的影响很小,而对协青早B的影响则达极显著,且长期的持续高温胁迫同样危害耐热水稻品种的结实率。此外,2个水稻品种对高温胁迫最敏感时期均为抽穗开花第3天。本研究可为选育耐热性水稻品种提供理论依据。

Abstract:In order to explore effects of high temperature stress effects on physiology and ecology, and comparing the effects on pollen grain diameter, pollen vitality and seed-setting rate at the high temperature condition during the flowering stage, different high-temperature stress was conducted by using temperature\|tolerant rice cultivar (Qianjiang 3 B) and temperature\|sensitive rice cultivar (Xieqingzao B). The results showed that a small effect on pollen grain vitality, anther cracking percentage and anther cracking hole for Qianjiang 3B was caused at high-temperature stress compared with the normal-temperature. But significant effect was observed for Xieqingzao B. The longtime high-temperature stress might result in lower seed fertility even for temperature tolerant rice cultivar. In additional, the third day after flowering was the most susceptible to high-temperature stress for both varieties. These results provides theory evidence for selecting heat tolerant rice varieties.

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