首页|Wetting alternating with partial drying during grain filling increases lysine biosynthesis in inferior rice grain
Wetting alternating with partial drying during grain filling increases lysine biosynthesis in inferior rice grain
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
Lysine content is a criterion of the nutritional quality of rice.Understanding the process of lysine biosyn-thesis in early-flowering superior grain(SG)and late-flowering inferior grain(IG)of rice would advance breeding and cultivation to improve nutritional quality.However,little information is available on differ-ences in lysine anabolism between SG and IG and the underlying mechanism,and whether and how irri-gation regimes affect lysine anabolism in these grains.Ajaponica rice cultivar was grown in the field and two irrigation regimes,continuous flooding(CF)and wetting alternating with partial drying(WAPD),were imposed from heading to the mature stage.Lysine content and activities of key enzymes of lysine biosynthesis,and levels of brassinosteroids(BRs)were lower in the IG than in the SG at the early grain-filling stage but higher at middle and late grain-filling stages.WAPD increased activities of these key enzymes,BR levels,and contents of lysine and total amino acids in IG,but not SG relative to CF.Application of 2,4-epibrassinolide to rice panicles in CF during early grain filling reproduced the effects of WAPD,but neither treatment altered the activities of enzymes responsible for lysine catabolism in either SG or IG.WAPD and elevated BR levels during grain filling increased lysine biosynthesis in IG.Improvement in lysine biosynthesis in rice should focus on IG.
BrassinosteroidsInferior grainLysine biosynthesisRiceWetting alternating with partial drying
Yi Jiang、Wenli Tao、Weiyang Zhang、Zhiqin Wang、Jianchang Yang
展开 >
Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou 225009,Jiangsu,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
万方数据
维普
