Imprint of tree species mycorrhizal association on microbial‐mediated enzyme activity and stoichiometry
Imprint of tree species mycorrhizal association on microbial‐mediated enzyme activity and stoichiometry
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树种菌根关联对微生物介导的酶活性和化学计量的影响
DOI：
10.1111/1365-2435.14311
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发表时间：
2023
影响因子：
5.2
通讯作者：
Vesterdal, Lars
中科院分区：
文献类型：
--
作者：
Zheng, Haifeng;Phillips, Richard P.;Rousk, Johannes;Yue, Kai;Schmidt, Inger Kappel;Peng, Yan;Wang, Senhao;Vesterdal, Lars
了解树种及其菌根关联对土壤过程的影响对于预测全球变化和森林管理决策导致的物种转变对生态系统的影响至关重要。虽然众所周知，以不同菌根类型为主的森林在碳 (C)、氮 (N) 和磷 (P) 循环方面可能有所不同，但这些模式由微生物介导的酶活性 (EA) 和生态酶化学计量 (ES) 驱动的程度仍然难以捉摸。在这里，我们使用来自 56 个同行评审的数据，综合了菌根关联对参与微生物 C、N 和 P 获取和 ES 的七种土壤酶的影响。我们发现，相对于外生菌根 (EcM) 树中的土壤，丛枝菌根 (AM) 树中的土壤表现出一些 C 获取酶（例如 β-葡萄糖苷酶；BG）的活性更高，并且 BG/NAG（N-乙酰氨基葡萄糖苷酶）和 BG/AP（酸性磷酸酶）的生态酶比更高。这些结果表明 AM 树具有快速的碳和养分周转率、无机养分经济性和较高的土壤微生物碳限制。我们还发现了 EcM 树比 AM 树具有有机养分经济性和土壤微生物对养分更大需求的证据。此外，菌根关联对某些土壤酶活性和酶化学计量（即 BG 和 BG/NAG 比率）的影响似乎与 AM 和 EcM 树之间土壤 pH 值、系统发育类群（即针叶树和阔叶树）和叶习性（即常绿和落叶）的差异有关。全球荟萃分析的结果表明，土壤 EA 和 ES 似乎在塑造土壤中发挥着关键作用。 AM 和 EcM 树种之间养分经济的差异，但在评估不同菌根群落森林的土壤过程时应考虑叶子形态和土壤条件。鉴于数据库中的大多数研究来自温带和亚热带地区，需要对其他生物群落进行进一步研究，以阐明在全球范围内驱动菌根效应的潜在机制。在期刊博客上阅读本文的免费简单语言摘要。
Understanding the effects of tree species and their mycorrhizal association on soil processes is critical for predicting the ecosystem consequences of species shifts owing to global change and forest management decisions. While it is well established that forests dominated by different mycorrhizal types can vary in how they cycle carbon (C), nitrogen (N) and phosphorus (P), the degree to which these patterns are driven by microbial‐mediated enzyme activity (EA) and ecoenzymatic stoichiometry (ES) remains elusive.Here, we synthesized the effects of mycorrhizal association on seven soil enzymes involved in microbial C, N and P acquisition and ES using data from 56 peer‐reviewed papers.We found that relative to soil in ectomycorrhizal (EcM) trees, soil in arbuscular mycorrhizal (AM) trees exhibited greater activity of some C acquisition enzymes (e.g. beta‐glucosidase; BG) and higher ecoenzymatic ratios of BG/NAG (N‐acetyl‐glucosaminidase) and BG/AP (acid phosphatase). These results supported that AM trees had rapid C and nutrient turnover rates, inorganic nutrient economics and high soil microbial C limitation. We also found evidence for an organic nutrient economy and greater soil microbial demand for nutrients in EcM trees compared to AM trees. In addition, the effect of mycorrhizal association on the activity of certain soil enzymes and enzymatic stoichiometry (i.e. BG and BG/NAG ratio) appeared to be associated with the differences in soil pH, phylogenetic group (i.e. conifers and broadleaves) and leaf habit (i.e. evergreen and deciduous) between AM and EcM trees.The results from the global meta‐analysis suggested that soil EA and ES appear to play critical roles in shaping the differences in the nutrient economy between AM and EcM tree species, but leaf morphology and soil conditions should be considered in evaluations of soil processes in forests of different mycorrhizal associations. Given that most of the studies in the database were from the temperate and subtropical regions, further research in other biomes is needed to elucidate the underlying mechanisms driving the mycorrhizal effect at the global scale.Read the free Plain Language Summary for this article on the Journal blog.