ORIGINAL RESEARCH article
Front. Agron.
Sec. Agroecological Cropping Systems
Volume 7 - 2025 | doi: 10.3389/fagro.2025.1628083
Optimizing the application strategy of phosphorus fertilizer by Pseudomonas E sp017968885 to increase phosphorus yield of pepper
Provisionally accepted
- 1Microbial Research Institute of Liaoning Province, Chaoyang, China
- 2China University of Mining and Technology, Beijing, China
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This study evaluated Pseudomonas E sp017968885's ability to mobilize insoluble phosphate under varying phosphorus fertilizer rates and its effects on soil properties and pepper yield. A pot experiment was established with six treatments, comprising five inoculated groups (P1+H50 to P5+H50) subjected to different phosphorus fertilizer rates (1.17～1.96 g/pot) and a non-inoculated control group (Control). The results show that Olsen-P (the available phosphorus) increased by 66.36～102.08% in treatment of P1+H50 to P3+H50 at fruit setting stage (P<0.05). The treatment of P2+H50 enhanced S-ACP (Soil acid phosphatase) (16.79%) activities versus control at fruit setting stage (P<0.05). The phosphorus uptake increased by 32.67～84.06% (P<0.05), correlating with yield boosts of 23.98～65.80% versus control (P<0.05). Meanwhile, the expression of phosphate-solubilizing ability-related genes such as pqq and gdh supports the observed changes in phosphate-related physicochemical indicators. Secondly, the genetic potential of Pseudomonas E sp017968885 in the synthesis of secondary metabolites, protein secretion and siderophore production provides a molecular basis for its superiority in environmental adaptation and ecological competition. These findings highlight Pseudomonas E sp017968885 as a promising biofertilizer for sustainable agriculture, enabling P-input reduction while improving crop productivity through enhanced nutrient cycling.
Keywords: pepper, Phosphate solubilizing bacteria, Soil physicochemical index, Soil phosphatase, Phosphorus fertilizer efficiency
Received: 13 May 2025; Accepted: 07 Oct 2025.
Copyright: © 2025 Hu, Hongyan, Miao, Liqun, Jian, Yan, Fucheng, Lingling and Zhixue. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Guo Lingling, 605153861@qq.com
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