Effects of Potassium-Containing Fertilizers on Sugar and Organic Acid Metabolism in Grape Fruits

作者：Jin Wang, Yuhang Lu, Xuemei Zhang, Wenjie Hu, Lijin Lin, Qunxian Deng, Hui Xia, Dong Liang, Xiulan Lv · 发表于：International Journal of Molecular Sciences · 年份：2024 · DOI：10.3390/ijms25052828 · 被引用次数：35 · 研究领域：Horticultural and Viticultural Research、Plant Physiology and Cultivation Studies、Plant nutrient uptake and metabolism

L.) production and study their mechanism of action, the effects of four potassium-containing fertilizers (complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate) on sugar and organic acid metabolism in grape fruits were investigated. Potassium-containing fertilizers increased the activity of sugar and organic acid metabolism-related enzymes at all stages of grape fruit development. During the later stages of fruit development, potassium-containing fertilizers increased the total soluble solid content and the sugar content of the different sugar fractions and decreased the titratable acid content and organic acid content of the different organic acid fractions. At the ripening stage of grape fruit, compared with the control, complex fertilizer, potassium nitrate, potassium sulfate, and potassium dihydrogen phosphate increased the total soluble solid content by 1.5, 1.2, 3.5, and 3.4 percentage points, decreased the titratable acid content by 0.09, 0.06, 0.18, and 0.17 percentage points, respectively, and also increased the total potassium content in grape fruits to a certain degree. Transcriptome analysis of the differentially expressed genes (DEGs) in the berries showed that applying potassium-containing fertilizers enriched the genes in pathways involved in fruit quality, namely, carbon metabolism, carbon fixation in photosynthetic organisms, glycolysis and gluconeogenesis, and fructose and mannose metabolism. Potassium-containing fertil...