水稻不同矮源苗期对赤霉素的反应研究  

Response of Various Rice Dwarf Varieties to Gebberellic Acid at Seedling Stage

作　　者：朱速松[1] 蒋志谦[1] 刘建昌[1] 谌生慧[1] 曹绍书[1] 陈梦玉[1] 

机构地区：[1]贵州省农业科学院水稻研究所

出　　处：《贵州农业科学》1998年第4期5-8,共4页Guizhou Agricultural Sciences

基　　金：贵州省自然科学基金

摘　　要：于１９９７年以２个粳稻和４个籼稻半矮秆品种作材料，对不同矮源苗期对ＧＡ３的反应进行了研究。结果表明：用不同浓度的ＧＡ３溶液处理水稻幼苗，各矮源的苗高都显著增长，与对照相比差异达极显著水平，但具不同矮秆基因的品种对ＧＡ３的反应不同，同样具有ｓｄ１矮秆基因的籼型矮源矮仔粘和粳型矮源黎明对ＧＡ３的反应也不一样，在一定的浓度下，随着ＧＡ３处理时间的延长，各矮源的苗高增长率呈现不同的变化规律；在籼稻品种中，处理４ｄ后，半矮秆基因ｓｄ１对ＧＡ３反应的敏感性强于其它半矮秆基因；在粳稻中，处理７ｄ前，对ＧＡ３反应敏感性强弱顺序为ｓｄ１＞ｓｄｓ（ｔ）。α淀粉酶诱导的研究表明：ＧＡ３对水稻胚乳α淀粉酶的诱导活性与水稻是否具有ｓｄ１基因无关。he response of various rice dwarf varieties, two japonica and four indica varieties, to gebberellic acid(GA3) at seedling stage were studied in 1997. The result indicated all varieties were sensitive to GA3 and the height of seedling were obviously increased, reaching significant level (0.1%) in comparison with CK. However, the response to GA3 were different among dwarf varieties with different semidwarf gene and the response to GA3 were also different between indicia variety (Aizizhan) and japonica variety (Reimei),although those bear the same semidwarf gene sd1, Under a certain range of GA3 level, the increasing rate of the seedling height in the dwarf varieties have shown different changes when prolonging GA3 treatment. After 4 days treatment the semidwarf gene sd1 in indicia varieties was much more sensitive to GA3 than other semidwarf genes. Within 7 days treatment the sensitivities of the semidwarf genes to GA3 in japonica varieties were in the other:sd1>sds(t). There was not any correlation found between the αamylase activity induced by GA3 in the deembryoed half seed and the dwarf rice varieties carrying sd1 gene or not.

关 键 词：水稻 矮秆基因 赤霉素 矮源苗期 

分 类 号：S511.01[农业科学—作物学]