Charactering protein fraction concentrations as influenced by nitrogen application in low-glutelin rice cultivars  

作　　者：LI Gang-hua CHEN Yi-lu DING Yan-feng GENG Chun-miao LI Quan LIU Zheng-hui WANG Shao-hua TANG She 

机构地区：[1]Jiangsu Collaborative Innovation Center for Modern Crop Production/Jiangsu Key Laboratory for Information Agriculture/National Engineering and Technology Center for Information Agriculture/Key Laboratory of Crop Physiology and Ecology in Southern China,Nanjing Agricultural University, Nanjing 210095, P.R.China

出　　处：《Journal of Integrative Agriculture》2016年第3期537-544,共8页农业科学学报（英文版）

基　　金：provided by the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD16B14, 2012BAD20B05, 2012BAD04B08)

摘　　要：To optimize both grain yield and quality of low-glutelin rice cultivars under N-fertilizer strategies, two-year field experiments involving three low-glutelin rice cultivars（W1240, W1721, W025） and an ordinary rice cultivar（H9405） with five N treatments were carried out to determine the effects of N application rate and genotype on protein fractions contents and Glutelin/Prolamin ratio（Glu/Pro）. The difference of protein fraction concentrations affected by N application rate existed in genotypes. Ordinary rice cultivar had a larger increase in glutlein concentration affected by N application rate than low-glutelin rice cultivars did. Glutelin in H9405 had a increase of 30.6 and 41.0% under the N4 treatment（360 kg N ha^（–1）） when compared with N0 treatment（no fertilizer N） in 2010 and 2011 respectively, while all the low-glutelin rice cultivars showed relatively smaller increases for two years. Variance analysis showed no significant effect of N application rate on glutelin in W1240 and W025 while the effects on albumin, globulin and prolamin were significant in low-glutelin rice. What＇s more, N treatment had no significant i nfluence on Glu/Pro ratios in low-glutelin rice cultivars while a significant increase in Glu/Pro ratio was observed in ordinary rice cultivar. So low-gultelin rice cultivars showed a different pattern from ordinary rice cultivars when influenced by N application rate.To optimize both grain yield and quality of low-glutelin rice cultivars under N-fertilizer strategies, two-year field experiments involving three low-glutelin rice cultivars（W1240, W1721, W025） and an ordinary rice cultivar（H9405） with five N treatments were carried out to determine the effects of N application rate and genotype on protein fractions contents and Glutelin/Prolamin ratio（Glu/Pro）. The difference of protein fraction concentrations affected by N application rate existed in genotypes. Ordinary rice cultivar had a larger increase in glutlein concentration affected by N application rate than low-glutelin rice cultivars did. Glutelin in H9405 had a increase of 30.6 and 41.0% under the N4 treatment（360 kg N ha^（–1）） when compared with N0 treatment（no fertilizer N） in 2010 and 2011 respectively, while all the low-glutelin rice cultivars showed relatively smaller increases for two years. Variance analysis showed no significant effect of N application rate on glutelin in W1240 and W025 while the effects on albumin, globulin and prolamin were significant in low-glutelin rice. What＇s more, N treatment had no significant i nfluence on Glu/Pro ratios in low-glutelin rice cultivars while a significant increase in Glu/Pro ratio was observed in ordinary rice cultivar. So low-gultelin rice cultivars showed a different pattern from ordinary rice cultivars when influenced by N application rate.

关 键 词：low-glutelin rice nitrogen protein fractions Glu/Pro 

分 类 号：S511[农业科学—作物学]