文献类型：期刊文献

英文题名：Stoichiometric imbalances and the dynamics of phosphatase activity and the abundance of phoC and phoD genes with the development of Cunninghamia lanceolata (Lamb.) Hook plantations

作者：Wang, Chaoqun[1,2,3] Xue, Lin[4] Jiao, Ruzhen[1,2,3]

第一作者：Wang, Chaoqun

通信作者：Jiao, RZ[1];Jiao, RZ[2];Jiao, RZ[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[3]Chinese Acad Forestry, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[4]Univ Goettingen, Fac Geosci & Geog, D-37077 Gottingen, Germany

年份：2022

卷号：173

外文期刊名：APPLIED SOIL ECOLOGY

收录：;Scopus(收录号：2-s2.0-85122179878);WOS:【SCI-EXPANDED(收录号:WOS:000763881200008)】；

基金：The present study was supported by the State Key Research Devel-opment Program of China (2016YFD0600302) .

语种：英文

外文关键词：C; N; P stoichiometry; Stand age; Phosphatase; phoC gene; phoD gene

摘要：Soil phosphatase and P-cycling functional genes, such as phoC and phoD, are crucial factors in regulating terrestrial P cycling, especially in highly weathered subtropical and tropical soils. Soil element stoichiometry (especially available C:N:P by measuring dissolved organic C (DOC):available N (AN):Olsen P plays an essential role in biogeochemical P cycling, but how it affects phosphatase activity and the abundance of phoC and phoD genes following afforestation is unclear. Here, we investigated how soil C:N:P stoichiometry affected the dynamics of soil phosphatase activity and the abundance of phoC and phoD genes in an age sequence of 6-, 12-, 18-, 25-, 32-, and 49-year-old Chinese fir plantations. The results showed that the phosphatase activity and the abundance of phoC gene were overall higher in 18-and 25-year-old plantations than in the other four plantations. The abundance of phoD gene gradually increased with stand age. Phosphatase activity significantly and positively correlated with DOC:Olsen P and AN:Olsen P ratios, but not with DOC:AN ratio. Soil phosphatase activity significantly positively correlated with phoC gene abundance, but not with phoD gene abundance, indicating that the phoC gene abundance is the dominant predictor of the microbial functional potential for secreting phosphatase. Further analysis suggested that the ratios of DOC:Olsen P and AN:Olsen P, total N, DOC, AN, Olsen P, and microbial biomass C were the main predictors of phoC gene abundance and that DOC:AN, total P, AN, Olsen P, and microbial biomass C were the main predictors of phoD gene abundance. These findings together highlight the importance of soil available element stoichiometry regulating microbial functional genes, with potential implications for subtropical and tropical biogeochemical processes and for understanding how soil available C:N: P stoichiometry regulates P biotransformation.