花后干旱对春小麦籽粒淀粉含量及淀粉形成关键酶活性的影响  

Effects of drought on the starch contents and activities of key enzymes after anthesis in spring wheat grains

作　　者：赵晶晶[1] 姚珊[1] 李昱[1] 康建宏[1] 吴宏亮[1] 许强[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《干旱地区农业研究》2015年第3期104-110,共7页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金(31160255)

摘　　要：为了研究花后干旱对春小麦籽粒淀粉形成影响的机理,缓减春小麦花后干旱危害,以宁夏春小麦宁春4号和宁春47号为供试材料,在盆栽条件下,人工模拟花后干旱,测定了春小麦籽粒淀粉含量及淀粉形成关键酶活性。结果表明：花后干旱胁迫显著降低春小麦籽粒淀粉含量,使宁春4号和宁春47号的直链淀粉下降9.78%～30.07%,支链淀粉下降9.02%～19.92%,淀粉总含量下降9.25%～22.82%;干旱使两品种的淀粉形成关键酶（ADPG-PPase、UDPG-PPase、SSS和SBE）活性下降,从而对淀粉品质产生影响。因此,应采取相应栽培技术缓解花后干旱危害,提高春小麦产量和品质。To study the effects of drought on grain starch contents and activities of related key enzymes and minimize damages caused by drought after anthesis in spring wheat ,two spring wheat cultivars ,Ningchun 4 and Ningchun 47 , were used in a pot experiment by manipulating the post-anthesis soil moisture .The results showed that the starch contents of Ningchun 4 and Ningchun 47 became decreased significantly under drought stress after anthesis .The amylase ,amy-lopectin ,and total starch contents were decreased by 9 .78% ~30 .07% ,9 .02% ~19 .92% and 9 .25% ~22 .82% , respectively .The activities of ADPG-PPase ,UDPG-PPase ,SSS ,SBE and the quality of spring wheat grains were al-so decreased .Therefore ,implementation of proper cultivation techniques remitting damages from drought after anthesis could improve the yield and the quality of spring wheat .

关 键 词：春小麦 花后干旱 淀粉含量 淀粉形成关键酶活性 淀粉品质 

分 类 号：S512.12[农业科学—作物学] S503.4