Effects of Different Foliar Fertilizer on Physiological Characteristics and Expression of Yield-related Genes of 'Longjing Youdizhan' (Oryza sativa)
PENG Jia-Yuan1,*, LIU Jun2,*, LIU Wen-Xiang3,**, ZHANG Zhen-Qian1,**
1 College of Agronomy, Hunan Agricultural University, Changsha 410128, China;
2 Changde Academy of Agriculture and Forestry Sciences, Changde 515000, China;
3 Hunan Agricultural Information and Engineering Research Institute, Changsha 410125, China
Abstract：High quality hybrid rice has good quality, loved by the vast number of consumers. Foliar fertilizer, as a way of applying fertilizer outside the roots of crops, has an important effect on the increase of crop yield. In order to screen out a reasonable ratio of foliar fertilizer and improve the yield of high quality rice, 'Longjing Youdizhan' (Oryza sativa) was used in this study. The effects of different foliar fertilizer ratios on the physiological indexes of high-quality hybrid rice leaves, the expression of yield-related genes enoyl-CoA hydratase (NOG1) and pale green leaf-9 (PGL-9) and yield were studied. The combination of brassinolide (BR), silicon (Si) and selenium (Se) foliar fertilizers were used to study 8 different treatments to find out the suitable foliar fertilizer combination based on the yield at harvest. The results showed that the yield of each treatment was higher than that of the control (CK), and the yield of Se treatment was the highest (8.8%), followed by BR treatment (8.3%) and Se+BR treatment (8.2%). Under Si treatment, chlorophyll content and catalase (CAT) activity were the highest at booting stage. Under the treatments of Si+BR, BR and Si, the soluble sugar content, superoxide dismutase (SOD) and peroxidase (POD) activities were the highest at heading stage. Under BR treatment, malonaldehyde (MDA) was the lowest at tillering stage. Correlation analysis showed that the expression of NOG1 and PGL-9 gene and chlorophyll content were significantly correlated with yield at heading stage. The correlation coefficients were -0.881, 0.932 and -0.940, respectively. In addition, the expression of NOG1 and PGL-9 gene were significantly correlated with chlorophyll content at heading stage, and the correlation coefficients were 0.993 and -0.971, respectively. In summary, selenium fertilizer was the best foliar fertilizer, and its application at heading stage can significantly increase the yield of high-quality rice 'Longjing Youdizhan'. This study can provide reference for high-yield cultivation techniques of high-quality rice.
彭佳元, 刘俊, 刘文祥, 张振乾. 不同叶面肥对水稻'隆晶优蒂占'生理特性及产量相关基因表达的影响[J]. 农业生物技术学报, 2023, 31(9): 1777-1785.
PENG Jia-Yuan, LIU Jun, LIU Wen-Xiang, ZHANG Zhen-Qian. Effects of Different Foliar Fertilizer on Physiological Characteristics and Expression of Yield-related Genes of 'Longjing Youdizhan' (Oryza sativa). 农业生物技术学报, 2023, 31(9): 1777-1785.
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