Effects of Foliar Magnesium on Yield,Quality and Contents of Anthocyanin and Metabolites of Purple Rice
The purple rice variety Dianxiangzi 1 was used as the material,the different foliar magnesium(Mg)rates[0(CK),2％MgO(MgⅠ)and 3％MgO(MgⅡ)]were set up at heading and filling stages,and the purple rice yield,quality,anthocyanin content and differential metabolites were studied under different treatments.The mechanism of Mg affecting anthocyanin content was preliminarily analyzed to provide scientific support for optimizing purple rice cultivation measures.The results showed that foliar Mg could significantly improve the setting rate,1000-grain weight,yield,head rice rate and the contents of cyanidin-3-O-glucoside and paeoniin-3-O-glucoside of purple rice.Compared with CK,purple rice yields of MgⅠand MgⅡ treatments increased by 10.0％and 15.8％,head rice rates increased by 6.9％and 5.2％,contents of cyanidin-3-O-glucoside increased by 28.9％and 23.5％,and contents of cyanidin-3-O-glucoside increased by 28.5％and 27.6％,respectively.A total of 182 metabolites were detected,and a total of 42 metabolites showed significant change in content under MgⅠ and MgⅡ treatments.These differential metabolites included 15 organic acids,3 benzenoids,4 amino acids,3 lipids,3 nucleotides,7 organic acids and 7 other metabolites.The contents of 25 and 16 metabolites of MgⅠand MgⅡ treatments significantly increased respectively.MgⅠ and MgⅡ treatments significantly affected amino acid and nucleotide metabolic pathways and increased the content of phenylalanine,the precursor of anthocyanin synthesis.However,the increase of Mg rate had no significant effect on the yield and quality of purple rice.In conclusion,foliar spray of 2％MgO is recommended at heading stage and filling stage,which can significantly improve the yield,quality and anthocyanin content of purple rice.
万方数据
维普
