Effects of long-term phosphorus addition on soil ratios of phosphomonoesterase to phosphodiesterase in three tropical forests. (30th September 2022)

• Record Type: Journal Article
• Authors: Mori, Taiki; Wang, Senhao; Wang, Cong; Chen, Ji; Peng, Cheng; Zheng, Mianhai; Huang, Juan; Wang, Faming; Liu, Zhanfeng; Mo, Jiangming; Zhang, Wei
• Editors: Huang, Zhiqun
• Is Part Of: Journal of plant ecology. Volume 16:Number 3(2023)
• Publication Date: 2022-09-30
• Subjects: soil extracellular enzymes -- phosphomonoestarase -- phosphodiesterase -- phosphorus fertilization -- tropical forest; 土壤胞外酶 -- 磷酸单酯酶 -- 磷酸二酯酶 -- 施磷 -- 热带森林; Plant ecology -- Periodicals; Phytogeography -- Periodicals; 581.705
• DOI: 10.1093/jpe/rtac091
• Languages: English
• ISSNs: 1752-9921

Abstract

Abstract: Soil microorganisms in tropical forests can adapt to phosphorus (P)-poor conditions by changing the activity ratios of different types of phosphatases. We tested whether microorganisms in P-poor tropical forest soils increased the phosphomonoesterase (PME) to phosphodiesterase (PDE) activity ratio, because a one-step enzymatic reaction of monoester P degradation might be more adaptive for microbial P acquisition than a two-step reaction of diester P degradation. A continuous 10-year P addition experiment was performed in three tropical forests. The activities of PME and PDE, and their ratio in soil, were determined under the hypothesis that the P-fertilized plots where P shortage is relieved would have lower PME:PDE ratios than the unfertilized controls. We demonstrated that long-term P addition in tropical forest soil did not alter the PME:PDE ratio in primary and secondary forests, whereas P fertilization elevated the PME:PDE ratio in planted forest. These results were in contrast to previous results. The long-term, large-scale P fertilization in our study may have reduced litter- and/or throughfall-derived PDE, which negated the lowered PME:PDE ratio via exogenous P inputs.