Reducing Phosphorus Fertilizer Application in the Typical Pomelo Production Region of China Improves Fruit Quality Traits via Metabolic Reprogramming

文献类型： 外文期刊

第一作者： Luo, Huilan

作者： Luo, Huilan;Ishfaq, Muhammad;Yan, Minwen;Zhang, Jing;Hassan, Mahmood Ul;Xu, Jiuliang;Li, Xuexian;Luo, Huilan;Ishfaq, Muhammad;Yan, Minwen;Zhang, Jing;Hassan, Mahmood Ul;Xu, Jiuliang;Li, Xuexian;Luo, Huilan;Ishfaq, Muhammad;Zhang, Siwen;Zhang, Xue;Tong, Ling;Ye, Delian;Wu, Liangquan;Liao, Haifang

作者机构：

关键词： Phosphorus fertilization; Environmental pollution; Nutrient use efficiency; Plant physiology; Gene expression; Food security

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.1； 五年影响因子：3.6 ）

ISSN： 0718-9508

年卷期： 2025 年

页码：

收录情况： SCI

摘要： China is the world's largest producer of pomelo, but long-term excessive phosphorus (P) application has led to serious environmental concerns. To address this, a 2-year field study was conducted with the objective to optimize P fertilizer inputs while improving fruit quality. An 8-year-old Guanxi pomelo orchard was selected for three P treatments: (1) 1.67 kg P plant-1 (P0); (2) 0.85 kg P plant-1 (P1); and (3) 0 kg P plant-1 (P2). Each treatment contained nine replicates in a randomized complete block design. The fruit yield and quality at physiological and metabolic levels were assessed. We found that lycopene and vitamin C contents significantly increased (17.94% and 46.43%, respectively) in fruits with a 50% reduction of P fertilizers compared to conventional P inputs (P0). Consistent with higher accumulation of lycopene, the expression of four genes controlling lycopene biosynthesis (PSY, PDS, ZISO and ZDS) was up-regulated, and transcription of one gene related to lycopene cyclization (LCYB) was down-regulated. Similarly, the expression of seven genes related to vitamin C biosynthesis (GMP, GME, GGP, GDH, PME, PG and GLDH) was up-regulated in mature fruits. Furthermore, metabolic analysis indicated that differentially accumulated primary metabolites were mainly related to organic acids and their derivatives (39.34-42.59%), and secondary metabolites were primarily associated with apigenin and neoeriocitrin. Our findings provide a mechanistic understanding of enhanced carotenoid and vitamin C biosynthesis and accumulation in pomelo fruits with reducing P fertilizers. They also step forward in the nutrient management programs to obtain better fruit quality with less environmental risks.

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