摘要
研究了低温对苗期和开花期不同耐寒番茄品种的过氧化物酶（ＰＯＤ）、酯酶和超氧化物歧化酶（ＳＯＤ）同工酶谱带的影响。结果表明ＰＯＤ、酯酶对低温的敏感程度比ＳＯＤ要高，开花期对低温的敏感程度低于苗期。在苗期和开花期，所有温度处理下的ＳＯＤ的谱带数在６个品种间一致，苗期的谱带为３条，开花期为４条。苗期在８℃低温处理下耐寒品种的ＰＯＤ和酯酶的谱带比２５℃处理下多出１～２条，而不耐寒品种的谱带没有变化。开花期所有品种在各处理温度下的ＰＯＤ同工酶谱带都为１２条。８℃低温下耐寒品种Ｋｏａｔｅａｉ、Ｓａｎｔｉａｍ多出一条Ｒｆ＝０．５９８的酯酶谱带，而耐寒品种ＵＣ８２Ｂ的谱带没有增加，但Ｒｆ＝０．４７２、Ｒｆ＝０．５９２和Ｒｆ＝０．７１３的３条谱带的活性加强。研究指出，无论在苗期还是在开花期，低温锻炼诱导了ＰＯＤ和酯酶同工酶结构和功能的改组，增强了低温适应性而提高抗寒能力，用ＰＯＤ。
The effect of low temperature on isoenzymic zymogram of peroxidase (POD),esterase and superoxide dismutase (SOD) during seedling stage and florescence was studied. The results show that,the reaction of SOD,POD and esteras'e to low temperature was different,the sensitivity of POD and esterase to temperature was higher than that of SOD,and lower in florescence than in seedling stage. The zymogram of SOD was same for the six varities under all temperature trestments,the number
出处
《中国蔬菜》
北大核心
1997年第3期1-3,共3页
China Vegetables
