中国水稻科学2012，Vol.26Issue(1)：77-84,8.DOI:10.3969/j.issn.1001-7216.2012.01.013
结实期干湿交替处理对稻米品质的影响及其生理机制
Effects of Alternate Drying-wetting Irrigation During Grain Filling on Grain Quality and Its Physiological Mechanisms in Rice
摘要
Abstract
The effect of dry-wet alternate water treatment during grain filling on grain quality and its physiological mechanisms were investigated with Yangdao 6 (indica) and Wuyujing 3 (japonica) as materials. The results showed milling quality and appearance quality were improved, breakdown values of rice flour were increased and setback values were decreased under alternate moderate drying and wetting treatment ( MD). The results were reversed under alternate severe drying and wetting treatment (SD). The activities of sucrose synthase (SuSase), ADP glucose pyrophosphorylase (ADPGase), soluble starch synthase (SSSase) , and Q-enzyme in grains increased under MD during grain filling, while decreased under SD. The enzyme activities were significantly correlated with main indices of grain quality. The concentrations of 1 aminocylopropane-1-carboxylic acid (ACC.biosynthetical precursor of ethylene) in root bleeding, the concentration of ACC and ethylene evolution rate in grains were significantly decreased under MD, while significantly increased under SD. The concentrations of ACC in root bleeding, the concentration of ACC and ethylene evolution rate in grains were significantly or extremely significantly and negatively correlated with the activities of SuSase, ADPGase, SSSase and Q-enzyme. The shifting concentration of ACC in root under alternate drying-wetting treatment during grain filling affected the concentration of ACC and ethylene evolution rate in grains, which influenced the activities of enzymes involved in starch synthesis, and grain quality finally.关键词
水稻/土壤水势/稻米品质/生理机制Key words
rice/ soil potential/ grain quality/ physiological mechanism分类
农业科技引用本文复制引用
刘立军,李鸿伟,赵步洪,王志琴,杨建昌..结实期干湿交替处理对稻米品质的影响及其生理机制[J].中国水稻科学,2012,26(1):77-84,8.基金项目
国家自然科学基金资助项目(30771274,30871480,30800670) （30771274,30871480,30800670）
江苏省基础研究计划资助项目(BK2009005) （BK2009005）
教育部博士学科点基金资助项目(200811170002). （200811170002）
