摘要
以耐荫品种扬麦158和不耐荫品种扬麦11两个小麦品种为材料,研究了拔节至成熟期遮光对小麦籽粒产量、淀粉含量和淀粉糊化特性的影响,并分析了花前营养器官非结构碳水化合物转运及其与籽粒产量、淀粉含量和淀粉糊化特性的关系.结果表明:遮光条件下小麦花前营养器官中可溶性总糖转运量的下降是造成小麦籽粒产量降低的原因之一;小麦支链淀粉在遮光条件下显著降低而直链淀粉变化不明显,导致小麦籽粒总淀粉含量和支/直显著下降;遮光降低了两品种小麦籽粒淀粉峰值粘度;降低了不耐荫品种扬麦11的低谷粘度,提高了其糊化温度,但对耐荫品种扬麦158的低谷粘度和糊化温度无显著影响.
This paper studied the effects of shading in the period from jointing to maturity on the grain yield, starch content, and starch paste traits of two winter wheat （ Triticum aestivum L. ） cultivars, shading-tolerant Yangmai 158 and shading-intolerant Yangmai 11, and analyzed the relationships of the redistribution of total soluble sugars stored before anthesis in vegetative organs with the grain yield, starch content, and starch paste parameters of the cuhivars. The results showed that shading decreased the redistribution of pre-anthesis stored total soluble sugars in vegetative organs to reproductive organ, resulting in the decrease of grain yield, and significantly decreased the amyl- opectin content but had no effects on the amylose content in grains, inducing a significant decrease in the ratio of amylopectin to amylase content in the grains. Shading also decreased the grain starch peak viscosity of the cultivars. Under shading, Yangmai 11 had a decrease of its grain starch through viscosity and an increase of starch pasting temperature, while Yangmai 158 had lesser responses in the two parameters.
出处
《应用生态学报》
CAS
CSCD
北大核心
2009年第4期805-810,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(30571093
30671216
30700483)
江苏省自然科学基金项目(BK2008329)
高等学校博士学科点专项科研基金项目(20050307006)
教育部新世纪优秀人才计划项目(06-0493)资助
关键词
遮光
籽粒产量
淀粉
糊化特性
非结构碳水化合物
shading
grain yield
starch
starch paste traits
nonstructural carbohydrates.
作者简介
牟会荣，女，1972生，博士研究生．主要从事作物生理生态研究．E-mail：muhuir@163．com
通讯作者．E-mail：jiangd@njau．edu．cn
