Exogenous Application of Abscisic Acid or Gibberellin Acid Affects Starch Granule Size Distribution in Grains of Wheat
会议名称：《第十五次中国小麦栽培科学学术研讨会》
会议日期：2012年
基 金：supported by the National Natural Science Foundation of China(31271661) the National Basic Research Program of China(973 Program 2009CB118602) the Public Service Sector (Agriculture)Research Program of China(201203100)
关 键 词：abscisic acid gibberellin granule size distribution starch winter wheat(Triticum aestivum L.)
摘 要：Granule size distribution of wheat starch is an important characteristic that can affect its chemical composition and the functionality of wheat *** high-yield winter wheat cultivars currently used in local wheat production,Gaocheng8901 and Shannong1391,were used to evaluate the effects of the exogenous spraying of ABA or GA during the reproductive phase of the initial grain filling on starch granule size distribution and starch components in grains at maturity,the field experiments were carried out in growing seasons 2009-2010 and *** results indicated that a bimodal curve was found in the volume and surface area distribution of grain starch granules,and the number distribution had a unimodal *** exogenous ABA resulted in a significant increase in the proportions(both by volume and by surface area) of B-type(9.9μm) starch granules,meanwhile,the exogenous GA led to converse effects on size distribution of those starch *** exogenous ABA also increased starch content,starch components content at maturity but significantly reduced the ratio of amylose to *** of GA3 significantly reduced starch content,amylopectin content but increased the ratio of amylose to *** ratio of amylose to amylopectin showed a significant negative relationship with the volume proportion of granules 2.8μm and 2.8-9.9μm but was positively related to the volume proportion of granules 22.8-42.8μm.