Grain and starch granule morphology in superior and inferior kernels of maize in response to nitrogen
文献类型： 外文期刊
作者： Zhao, Fucheng 1 ; Jing, Liquan 2 ; Wang, Decheng 3 ; Bao, Fei 1 ; Lu, Weiping 2 ; Wang, Guiyue 3 ;
作者机构： 1.Zhejiang Acad Agr Sci, Dongyang Inst Maize Res, Dongyang 322100, Zhejiang, Peoples R China
2.Yangzhou Univ, Key Lab Crop Genet & Physiol Jiangsu Prov, Yangzhou 225009, Jiangsu, Peoples R China
3.Jiangsu Hongqi Seed Co Ltd, Taizhou 225300, Jiangsu, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2018 年 8 卷
页码：
收录情况： SCI
摘要： Maize (Zea mays L.) contributes approximately 55% of China's grain production. The effects of nitrogen (N) on maize grain morphology and starch granules remain elusive. In this study, a field experiment in clay loam soil was conducted using three maize hybrids (Suyu 30, Suyu 20, and Suyu 29) and four N levels (0, 360, 450, and 540 kg ha(-1)) in 2010 and 2012. The results indicated that increased grain length and width, starch granule number, surface area, and volume, was associated with the application of 450 kg ha(-1) of N. Differences between superior (ear base) and inferior (apical) grains decreased under highest yield treatments. The effects of N levels on inferior grains was more than that on superior grains. The starch granules of superior grains showed more polygonal, and bigger shape than inferior grains. The results revealed that N levels affected size and morphology of starch granules and grains. The application of 450 kg N ha(-1) resulted in larger-sized starch granules and less difference between superior and inferior grains.
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