首页|甘薯贮藏期间淀粉酶种类变化及其部分性质分析

甘薯贮藏期间淀粉酶种类变化及其部分性质分析

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本文就甘薯收获后,自然储藏期间淀粉酶种类变化和部分性质进行研究.从收获开始,每间隔2周取样1次,按3 mL/g加入缓冲液,提取可溶性总蛋白,经8% 连续聚丙烯酰胺凝胶电泳(PAGE)及淀粉酶活性染色,结果显示:在贮藏期间,有新的淀粉酶活性带出现,在性质上与原有淀粉酶活性带存在差异.主要表现在,对 β-巯基乙醇和EDTA均非常敏感,而原有淀粉酶活性带不敏感;在热稳定性方面新出现的淀粉酶也更为敏感.说明甘薯块根在贮藏期间,新陈代谢旺盛,有新的淀粉酶表达,是需要二硫键的金属酶.
Analysis of the part characteristics and the difference of amylase in tuberous roots of sweet potato during storage period
The part characteristics and the difference of amylase were investigated in tuberous root of sweet potato ,during storage period .The total soluble protein were extracted with 3 mL /g buffer ,it harvests between 2 weeks in the storage time .Difference amylases were found in isozyme composition in tuberous roots of sweet potato during storage period ,by electrophoresis on 8% native polyacrylamide gel and active stain by using soluble starch as substrate .New amylase responds differently to inhibitors , it is sensitive to EDTA or thiol-group reagent ,and it is more sensitive to temperature than β-amylase . New amylase can be metalloenzyme with disulfide bond .

Sweet potato(Ipomoea batatas Lam .)Tuberous rootAmylaseSensitivity

张勇为、张义正、谭文芳、杨松涛

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四川大学生命科学学院 ,四川省分子生物学及生物技术重点实验室 ,成都 610064

四川省农业科学院作物研究所 ,成都 610066

甘薯 块根 淀粉酶 敏感性

四川省科技厅项目

2012JY0074

2018

四川大学学报(自然科学版)
四川大学

四川大学学报(自然科学版)

CSTPCDCSCD北大核心
影响因子:0.358
ISSN:0490-6756
年,卷(期):2018.55(1)
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