Phosphorus acquisition strategies of arbuscular mycorrhizal and ectomycorrhizal trees in subtropical plantations
Phosphorus acquisition strategies of arbuscular mycorrhizal and ectomycorrhizal trees in subtropical plantations
复制标题
亚热带人工林丛枝菌根和外生菌根树的磷获取策略
DOI：
10.1111/ejss.13303
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发表时间：
2022-08
影响因子：
4.2
通讯作者：
Xuefa Wen
中科院分区：
文献类型：
--
作者：
Yang Yang;Xinyu Zhang;Jing Wang;Liang Kou;Zeqing Ma;Sidan Lyu;Jie Wei;Huimin Wang;Xuefa Wen
树木与不同的真菌形成共生，以利用土壤养分，例如磷 (P)。目前还没有关于丛枝菌根（AM）和外生菌根（EM）物种促进磷获取从而调节磷有限的亚热带森林土壤磷有效性的确切策略的准确信息。我们研究了中国亚热带人工林中与 7 种 AM 和 7 种 EM 树种的磷获取策略相关的植物性状和根际土壤特性。 AM 树根际土壤的速效磷含量（与酸性磷酸单酯酶活性相关）高于 EM 树。吸收性细根中磷含量较高，表明 AM 树比 EM 树从土壤中吸收了更多的 P。叶片磷吸附效率表明，AM树比EM树吸收更多的地上磷。结构方程模型的结果表明，AM 树以细菌为主，导致 pH 值较低，而 EM 树以外生菌根和腐生真菌为主，它们分泌酸性磷酸单酯酶来开采根际土壤中的磷。 AM树比EM树具有更高的菌根定殖率，而EM树比AM树具有更高的比根长度，这表明AM树倾向于依赖菌根，而EM树倾向于依赖根来从土壤中清除磷。我们的研究结果表明，为了影响磷的有效性并缓解磷的缺乏，AM 树比 EM 树吸收了更多的地上磷，并在地下开采和清除了更多的磷。
Trees form symbioses with different fungi to exploit soil nutrients, such as phosphorus (P). There is no precise information about the exact strategies by which arbuscular mycorrhizae (AM) and ectomycorrhizae (EM) species facilitate P acquisition and thereby regulate soil P availability in the P‐limited subtropical forests. We investigated the plant traits and rhizosphere soil properties related to the P acquisition strategies of seven AM and seven EM tree species in a subtropical plantation in China. The available P content, which was related to acid phosphomonoesterase activity, was higher in the rhizosphere soils of the AM trees than in those of the EM trees. The higher P content in the absorptive fine roots indicated that the AM trees absorbed more P from the soil than the EM trees. The leaf P adsorption efficiency indicated that AM trees resorbed more aboveground P than EM trees. Results from structural equation modelling demonstrated that AM trees were dominated by bacteria, which contributed to the low pH, while EM trees were dominated by ectomycorrhizal and saprophytic fungi that secreted acid phosphomonoesterase to mine P in the rhizosphere soil. The AM trees had higher mycorrhizal colonisation rates than the EM trees, while the EM trees had higher specific root lengths than the AM trees, which suggests that the AM trees tended to depend on mycorrhizae, while EM trees tended to depend on roots, to scavenge P from soil. Our findings suggest that, to influence the P availability and alleviate P deficiencies, the AM trees resorbed more P aboveground and mined and scavenged more P belowground than the EM trees.
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影响因子：
9.7
作者：
Saiya-Cork, KR;Sinsabaugh, RL;Zak, DR
通讯作者：
Zak, DR
影响因子：
5.2
作者：
Bodeker, Inga T. M.;Lindahl, Bjorn D.;Clemmensen, Karina E.
通讯作者：
Clemmensen, Karina E.
菌根和环境对木本树木根性状分解联系的控制
影响因子：
9.4
作者：
Jiang, Lei;Wang, Huimin;Kou, Liang
通讯作者：
Kou, Liang
影响因子：
6.4
作者：
Haiyang Zhang;X. Lü;H. Hartmann;A. B. Keller;Xingguo Han;S. Trumbore;Richard P Phillips
通讯作者：
Haiyang Zhang;X. Lü;H. Hartmann;A. B. Keller;Xingguo Han;S. Trumbore;Richard P Phillips
影响因子：
56.9
作者：
Bennett, Jonathan A.;Maherali, Hafiz;Klironomos, John
通讯作者：
Klironomos, John