文献类型：期刊文献

英文题名：Soil phosphorus cycling microbial functional genes of monoculture and mixed plantations of native tree species in subtropical China

作者：Qin, Lin[1] Xiao, Zhirou[1] Ming, Angang[2,3] Teng, Jinqian[1] Zhu, Hao[1] Qin, Jiaqi[1] Liang, Zeli[1]

第一作者：Qin, Lin

通信作者：Qin, L[1]

机构：[1]Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning, Guangxi, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang, Peoples R China;[3]Guangxi Youyiguan Forest Ecosyst Res Stn, Pingxiang, Peoples R China

年份：2024

卷号：15

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;Scopus(收录号：2-s2.0-85199969832);WOS:【SCI-EXPANDED(收录号:WOS:001279726500001)】；

基金：The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This study was supported by the National Natural Science Foundation of China (Grant numbers 31560109 and 32071764), the Natural Science Foundation of Guangxi Zhuang Autonomous Region (Grant number 2020GXNSFAA297208).

语种：英文

外文关键词：planted forest; soil phosphorus cycling microbial functional genes; metagenomic sequencing; molecular ecological network structure; subtropical China

摘要：Background: Transforming coniferous plantation into broadleaved or mixed broadleaved-coniferous plantations is the tendency of forest management strategies in subtropical China. However, the effects of this conversion on soil phosphorus (P) cycling microbial functional genes are still unknown. Methods: Soil samples were collected from 0-20, 20-40, and 40-60 cm (topsoil, middle layer, and subsoil, respectively) under coniferous Pinus massoniana (PM), broadleaved Erythrophleum fordii (EF), and their mixed (PM/EF) plantation in subtropical China. Used metagenomic sequencing to examine the alterations of relative abundances and molecular ecological network structure of soil P-cycling functional genes after the conversion of plantations. Results: The composition of P-cycling genes in the topsoil of PM stand was significantly different from that of PM/EF and EF stands (p < 0.05), and total phosphorus (TP) was the main factor causing this difference. After transforming PM plantation into EF plantation, the relative abundances of P solubilization and mineralization genes significantly increased in the topsoil and middle layer with the decrease of soil TP content. The abundances of P-starvation response regulation genes also significantly increased in the subsoil (p < 0.05), which may have been influenced by soil organic carbon (SOC). The dominant genes in all soil layers under three plantations were phoR, glpP, gcd, ppk, and ppx. Transforming PM into EF plantation apparently increased gcd abundance in the topsoil (p < 0.05), with TP and NO3--N being the main influencing factors. After transforming PM into PM/EF plantations, the molecular ecological network structure of P-cycling genes was more complex; moreover, the key genes in the network were modified with the transformation of PM plantation. Conclusion: Transforming PM into EF plantation mainly improved the phosphate solubilizing potential of microorganisms at topsoil, while transforming PM into PM/EF plantation may have enhanced structural stability of microbial P-cycling genes react to environmental changes.