摘要
以防雨池栽的方式研究了限量灌溉对冬小麦籽粒淀粉合成和积累的影响。结果表明 ,冬小麦籽粒中可溶性淀粉合成酶 (SSS)、淀粉粒结合态合成酶 (GBSS)和Q酶 (一种分支酶 )均是在灌浆中期 (花后 14d)活性最高。中度、严重干旱显著地降低了它们的活性。适宜的灌水处理 (处理C和处理D)使三种酶保持较高的活性 ,这是形成较高产量的生理基础。三种酶的活性均是鲁麦 2 1的较高。土壤水分亏缺严重 (处理A)显著降低籽粒中淀粉、支链淀粉和直链淀粉的积累 ,灌麦黄水最终减少了它们的含量。适宜的灌水处理 (处理C和处理D)使它们的含量增加。鲁麦 2 1的淀粉含量、支链淀粉含量高于济南 17,而直链淀粉含量以后者的较高。土壤水分亏缺提高了籽粒中淀粉的支 /直比例 ,鲁麦 2 1的支 /直比例较大。其比值高有利于改善面条的品质。
This study was carried out by culturing method in proof rainfall trough in middle area of Shandong province during 1999-2000. The activities of soluble starch synthase (SSS), granule bound starch synthase (GBSS), and Q enzyme (a kind of branch enzyme) all reached the highest during filling middle stage 14days after flowering, and decreased significantly under moderate and serious drought condition. The activities of three enzyme in Lumai 21 were higher than those in Jinan 17. Under terrible soil moisture deficit (treatment A), the accumulation of the total starch, amylopectin and amylose in the grains declined significantly. Irrigation at milk stage was not useful for the starch of accumulation. Generally, the content of starch and amylopectin in Lumai 21 was higher than that in Jinan 17, but the content of amylose was contrary higher. The deficit of soil moisture made amylopectin/amylose ratio rising, especially to Lumai 21, and the high ratio could improve noodle quality
出处
《作物学报》
CAS
CSCD
北大核心
2003年第4期595-600,共6页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目 ( 3 9970 42 5 )
中国科学院知识创新工程项目 (KSCX2 1 0 7)
国家重点基础研究发展规划项目 ( 973项目 ) (G19990 43 40 7)
