Multiple phosphorus acquisition strategies adopted by fine roots in low-fertility soils in Central Amazonia
Multiple phosphorus acquisition strategies adopted by fine roots in low-fertility soils in Central Amazonia
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DOI：
10.1007/s11104-019-03963-9
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发表时间：
2020-05-01
期刊：
影响因子：
4.9
通讯作者：
Hartley, Iain P.
中科院分区：
文献类型：
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作者：
Lugli, Laynara F.;Andersen, Kelly M.;Hartley, Iain P.
古亚马逊土壤的特点是土壤磷（P）浓度低。因此，据推测，植物可能会投入大量的地下资源，以调整其磷吸收策略，包括根形态，生理（磷酸酶活性）和生物（丛枝菌根（AM）协会）的适应。由于这些策略是能源需求，我们假设，形态性状和根磷酸酶分泌和共生协会之间的权衡会发生。具体来说，我们预计，投资于更细的根，因此有更大的能力，以探索大的土壤体积的植物，将有一个高的投资在生理适应，如增强磷酸酶的生产。相比之下，我们预计，植物主要较厚的根将投资更多的共生协会，其中碳交易的P从AM真菌群落。方法收集植物吸收根（
Background and aims Ancient Amazon soils are characterised by low concentrations of soil phosphorus (P). Therefore, it is hypothesised that plants may invest a substantial proportion of their resources belowground to adjust their P-uptake strategies, including root morphological, physiological (phosphatase enzyme activities) and biotic (arbuscular mycorrhizal (AM) associations) adaptations. Since these strategies are energy demanding, we hypothesise that trade-offs between morphological traits and root phosphatase exudation and symbiotic associations would occur. Specifically, we expected that plants which invest in finer roots, and therefore have greater ability to explore large soil volumes, would have a high investment in physiological adaptations such as enhanced phosphatase production. In contrast, we expected that plants with predominantly thicker roots would invest more in symbiotic associations, in which carbon is traded for P acquired from AM fungal communities. Methods We collected absorptive roots (