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光敏核不育水稻幼穗的乙烯生成与育性转换

李德红, 骆炳山, 屈映兰

华中农业大学.湖北,武汉 430070

摘要

研究了在不同光温组合下光敏核不育水稻(PGMR)农垦58S(NK58S)及普通水稻品种农垦58(NK58B)的幼穗乙烯生物合成变化及其与育性表达的关系。结果表明NK58S幼穗乙烯生成受光周期和温度的共同调节,而光周期对NK58B幼穗乙烯生成无明显影响。NK58S幼穗乙烯生成的变化与育性转换光温作用模式完全吻合。其幼穗乙烯释放速率(ERR)与花粉可育度(Iny)呈极显著负相关。用AVG抑制乙烯生成可使NK58S(LD)不育性明显逆转,而用ACC促进乙烯生成又可急剧降低NK58S(SD)的可育水平。表明幼穗乙烯生成与PGMR育性表达密切相关,乙烯参与育性转换的调控并可能起着重要作用。

关键词： 光敏核不育水稻; 育性转换; 乙烯; ACC(1—氨基环丙烷—1—羧酸); AVG(氨基乙氧基乙烯基甘氨酸)

Ethylene biosynthysis of photoperiod-sensitive genic male-sterile rice and fertility alteration

Li Dehong, Luo Bingshan, Qu Yinglan

Huazhong Agricultural University.Wuhan 430070,Hubei

Abstract

The changes of ethylene biosynthysis in young panicles of PGMR (photoperiod-sensitive genic male-sterile rice) cv. Nongken58S (NK58S)and its normal parent line cv. Nongken58 (NK58B) and the relationship between ethylene biosynthysis and fertility expression of PGMR under different photoperiod-temperature conditions were studied. The results showed that ethylene biosynthysis in yound panicles of NK58S was regulated jointly by photoperiod and temperature, but it was not influenced significantly by photoperiod in those of NK58B. The changes in rate of ethylene biosynthysis in the yound panicles of NK58S coincided very well with the model of photoperiod - temperature - reaction - induced PGMR fertility alteration. A significant negative correlation was found between ethylene release rate (ERR) of yound panicles of NK58S and the corresponding pollen fertility. When plants were treated with AVG (aminoethoxy vinylglycine) to retard ethylene biosynthesis, the sterility of NK58S (LD) was obviously reversed; while in the plants treated with ACC (1-amino-cyclopanel-carboxylic acid) to stimulate ethylene biosynthesis, the fertility level of NK58S (SD) decreased sharply. It is concluded that ethylene biosynthesis is closty correlated with the fertility expression of PGMR, and ethylene plays a major role in the regulation of fertility alteration of NK58S.

Key words: PGMR(photoperiod-sensitive genic malesterile rice);Fertility alteration;Ethylene;ACC (1-amino- cyclopane-1-carboxylic acid);AVG(aminoethoxy vinylgly-cine)

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引用本文：

李德红, 骆炳山, 屈映兰. 光敏核不育水稻幼穗的乙烯生成与育性转换[J]. 生理学报 1996; 48 (3): .

Li Dehong, Luo Bingshan, Qu Yinglan. Ethylene biosynthysis of photoperiod-sensitive genic male-sterile rice and fertility alteration. Acta Physiol Sin 1996; 48 (3): (in Chinese with English abstract).