Effects of shading after pollination on starch physico-chemical properties of waxy maize
Effects of shading after pollination on starch physico-chemical properties of waxy maize
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DOI：
10.5958/j.2348-7542.15.1.006
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发表时间：
2014
影响因子：
--
通讯作者：
Dalei Lu;Xuemei Cai;Renchao Xu;Junyu Zhao;Weiping Lu
中科院分区：
文献类型：
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作者：
Dalei Lu;Xuemei Cai;Renchao Xu;Junyu Zhao;Weiping Lu
授粉后的遮光胁迫是影响糯玉米淀粉品质的重要非生物因子。研究了授粉后遮光对糯玉米淀粉理化特性的影响。以糯玉米品种苏玉糯5号为试材，于2011年和2012年进行了田间遮光试验。用黑色聚乙烯网对植物进行遮光，并将光照强度降低30%，以自然光下生长的植物作为对照。授粉后遮光处理使淀粉粒大小和碘结合力减小，2θ=15o、17o、18o和23o处的峰值强度降低。在这两个年份，通过遮光降低了糊化粘度。遮光处理对ΔHgel和Tc无影响，使To和Tp降低，ΔHrest和%R增加。结果表明，遮光通过降低淀粉颗粒大小、碘结合力和峰值强度，降低淀粉糊化和老化特性。
Shading stress after pollination is an important abiotic factor affecting waxy maize starch quality. The objective of the current study is to investigate the effects of shading after pollination on starch physico-chemical properties of waxy maize. The shading experiment was conducted in the field in 2011 and 2012, with a waxy maize variety (Suyunuo5) as the test material. Plants were given shading with black polyethylene nets and the light intensity was reduced by 30%, with plants grown under natural light were taken as control. Shading after pollination decreased the starch granule size and iodine binding capacity, and reduced the peak intensities at 2θ=15o, 17o, 18o and 23o. Pasting viscosities were decreased by shading in both the years. The ΔHgel and Tc were not affected, To and Tp were decreased, while ΔHrest and %R were increased by shading. The results indicated that shading deteriorated the pasting and retrogradation properties through reducing the starch granule size, iodine binding capacity and peak intensities.