水稻直链淀粉含量选择对淀粉合成关键酶活性影响  

Effect of directed selection of amylose content on activities of key amylosynthetase

作　　者：刘洪亮[1] 李晓光[1] 黄星[1] 袁万臣[1] 徐美兰[1] 张丰转[1] 金正勋[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030

出　　处：《东北农业大学学报》2009年第4期11-16,共6页Journal of Northeast Agricultural University

基　　金：黑龙江省教育厅资助项目(11531017);东北农业大学创新团队发展计划资助项目

摘　　要：选用直链淀粉含量有显著差异的杂交后代及亲本,分析其灌浆过程中籽粒淀粉积累和合成关键酶活性变化。结果表明,通过籽粒直链淀粉含量的选择不仅可以提高或降低杂种后代的直链淀粉合成和积累速度,而且还可以明显改变籽粒淀粉合成关键酶活性大小;直链淀粉含量低的后代ADPG焦磷酸化酶和可溶性淀粉合成酶活性达到峰值的时间比含量较高的后代要早,而淀粉分支酶活性达到峰值时间与此相反。The japonica parent plants and their hybrid progenies with significantly different amylose content were investigated to reveal the grain amylose accumulation and the activities of key amylosynthetase during the course of their grain filling. The results showed that prior selection of grain amylose content could not only lead to the increase or decrease of grain amylose content in the hybrid progenies, but also obviously change the activity of key enzymes for starch synthesis in grain. The activities of ADP glucose pyrophosphorylase（AGPP） and soluble starch synthase（SSS） arrived the peak in the hybrid progenies with lower amylose content more quickly than those with higher amylose content; however, the activities of starch branching enzyme （SBE） arrived the peak in the hybrid progenies with lower amylose content more slowly than those with higher amylose content instead.

关 键 词：水稻 杂种后代 直连淀粉含量选择 淀粉合成关键酶活性 

分 类 号：S511[农业科学—作物学]