Vol.90, No.4, 2021, pp.1285-1292, doi:10.32604/phyton.2021.014778
Accumulation Characteristics of Protein and Non-Protein Components and Their Correlations with Protein Concentration in Rice Grains
  • Xiaoli Zhang1,2,#, Xiaohong Yin2,3,#, Jiana Chen3,#, Fangbo Cao3, Yu Liu3, Zhengwu Xiao3, Liqin Hu3, Guanghui Chen3, Tianfeng Liang1,2,*, Min Huang3,*
1 Rice Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530007, China
2 Guangxi Key Laboratory of Rice Genetics and Breeding, Nanning, 530007, China
3 Crop and Environment Research Center for Human Health, College of Agronomy, Hunan Agricultural University, Changsha, 410128, China
* Corresponding Author: Tianfeng Liang. Email: ; Min Huang. Email:
Received 28 October 2020; Accepted 17 December 2020; Issue published 27 April 2021
Protein in rice grains is an important source of nutrition for rice consumers. This study mainly aimed to identify the critical factors that determine grain protein concentration in rice. Accumulation parameters, including mean accumulation rate (Rmean) and active accumulation duration (Dactive), for protein and non-protein components and their correlations with protein concentration in rice grains were investigated in field experiments conducted over two years with six rice cultivars. Results showed that grain protein concentration ranged from 9.6% to 11.9% across cultivars and years. Accumulation processes of protein and non-protein components were well fitted by the logistic equation for all six rice cultivars in both years, and the ratio of protein to non-protein for Rmean and Dactive ranged from 0.08 to 0.12 and 1.01 to 1.33, respectively. Grain protein concentration was significantly correlated with protein to non-protein ratio for Rmean. This study suggests that grain protein concentration is not solely determined by the accumulation of protein or non-protein component, but by the coordination of protein and non-protein accumulation.
Grain protein concentration; logistic regression; non-protein accumulation; protein accumulation; rice
Cite This Article
Zhang, X., Yin, X., Chen, J., Cao, F., Liu, Y. et al. (2021). Accumulation Characteristics of Protein and Non-Protein Components and Their Correlations with Protein Concentration in Rice Grains. Phyton-International Journal of Experimental Botany, 90(4), 1285–1292.
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