Abstract: The relationship between ethylene metabolism and the fortility change of PGMR Nongken 58S was studied. It was discovered that ethylene release rate of young panicles in long day (LD) was higher than that in short day (SD)with a suitable temperature range of fertility change. In LD and lower temperature (≈25℃ ), the ethylene release rate was low, but in SD and high temperature (≈32℃), the ethylene release rate was high. The ethylene release rate of young panicle was negatively correlated with pollen fertility. When the plants were treated with aminoethoxy vinylglyeine (AVG), an inhibitor of ethylene biosynthesis, an obvious increase of pollen fertility was observed in sterile condition. These results indicated that ethylene release rate was regulated by photoperiod and temperature, which was consensus with the model of light-temperature action in fertility change. Ethylene was involved in the regulation of fertility change, and may played a key role in the process of pollen sterility. Aminoethoxy vinylglycine: Ethylene; Fertility change: Photoperiod-sensitive genic male sterile rice (PGMR)

Key words: photoperiod-sensitive genic male sterile rice, fertility change, ethylene, aminoethoxy vinylglycine

摘要： 研究了乙烯与光敏核不育水稻(PGMR)农垦58S育性转换的关系。发现幼穗的乙烯释放速率在育性转换的适宜温度中长日照处理明显比短日照处理高， 但在低温长日照下大为降低而在高温短日照下又可雏持高水平的乙烯释放， 幼穗乙烯释放速率与花粉可育度之间呈极显著负相关。在不育条件下用乙烯代谢抑制剂氨基乙氧基乙烯基甘氟酸(AVG)处理，可诱导花粉可育性的明显表达， 由此初步证明农垦58S幼穗的乙烯释放速率受到光周期和温度的共同调节，井与育性转换的光温作用模式极为吻合；乙烯参与育性转换的调节，可能在花粉败育中起关键性作用。

关键词: 光敏核不育, 水稻, 育性, 乙烯