外源施用橙皮苷对盐胁迫下甜菜幼苗转录组的影响OA

[Objective]The application of exogenous compounds can enhance crop adaptability to adverse conditions.Hesperidin,a natural flavonoid,has shown significant potential in improving crop salt tolerance.[Methods]In this study,the effects of hesperidin(at a concentration of 100 μmol/L)on the transcriptome characteristics and chlorophyll fluorescence parameters of salt-stressed beet seedlings were investigated by applying exogenous hesperidin or not.[Results]The results indicated that the application of hesperidin notably elevated the chlorophyll content within the foliage,and enhanced the actual photochemical efficiency Y(II)and maximum photochemical quantum efficiency Fv/Fm of PSII.Transcriptomic analysis identified 1,994 and 1,042 differentially expressed genes(DEGs)in leaves and roots,respectively.The DEGs in leaves were predominantly linked to chloroplasts and photosynthesis-related pathways,whereas those in roots were principally engaged in flavonoid biosynthesis,nitrogen metabolism,and phenylpropanoid biosynthesis.[Conclusion]Exogenous hesperidin application significantly enhances the salt tolerance of sugar beet,offering a cost-effective and efficient approach.The findings are of practical importance for extending the cultivation of sugar beets and utilizing saline-alkali land resources.