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Effects of Elevated Ozone Concentration on Starch and Starch Synthesis Enzymes of Yangmai 16 Under Fully Open-Air Field Conditions

作者：

Zhang Ru-biao;Hu Hai-juan;Zhao Zheng;Yang Dan-dan;Zhu Xin-kai;Guo Wen-shan;Zhu Jian-guo;Kobayashi, Kazuhiko

单位：

Yangzhou Univ, Jiangsu Prov Wheat Res Inst, Key Lab Crop Genet & Physiol, Yangzhou 225009, Peoples R China;Chinese Acad Sci, Inst Soil Sci, Minist Sci & Technol, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China;Univ Tokyo, Grad Sch Agr & Life Sci, Tokyo 1138657, Japan

关键词：

O-3;FACE;wheat;starch;activity of enzymes

摘要：

O-3 is not only greenhouse gas but also a primary gaseous contaminant in the atmosphere. It has long-lasting effects on crop growth, yield and quality, and brings a series of ecological and environmental problems. A free-air controlled enrichment (FACE) system was applied to study the effect of elevated ozone concentration on activities of key enzymes of starch synthesis of Yangmai 16 in 2009-2010. The main-plot treatment had two levels of O-3: ambient level (A-O-3) and 50% higher than ambient level (E-O-3). The main results were that accumulation rate of amylose, amylopectin and starch were represented in a single peak curve, and their content and accumulation amount rose gradually. The O-3 elevation decreased the accumulation rate of amylose, amylopectin and starch amylase, reduced the accumulation amount of amylopectin and starch, and decreased the content of amylopectin and starch, but increased the content of amylose. With the increase of O-3 concentration, the enzyme activity of grain granule-bound starch synthase (GBSS), soluble starch synthase (SSS) and starch branching enzyme (SBE) decreased after anthesis. The activities of GBSS and SSS had highly significant correlations with amylose, amylopectin and starch accumulation rate, and the activity of SBE had significant correlations with these items. So the O-3 elevation decreased the activity of key enzymes of starch synthesis, which led to the variation of starch synthesis.

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Effects of Elevated Ozone Concentration on Starch and Starch Synthesis Enzymes of Yangmai 16 Under Fully Open-Air Field Conditions

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