期刊
ECOLOGY LETTERS
卷 21, 期 5, 页码 713-723出版社
WILEY
DOI: 10.1111/ele.12939
关键词
Mycorrhizal fungi; phosphate; resource partitioning; seedling growth; soil organic phosphorus; tropical and subtropical forests
类别
资金
- NERC Standard Discovery grant [NE/M004848/1]
- N8 AgriFood programme
- NERC [NE/M004864/1, NE/M004848/1] Funding Source: UKRI
Partitioning of soil phosphorus (P) pools has been proposed as a key mechanism maintaining plant diversity, but experimental support is lacking. Here, we provided different chemical forms of P to 15 tree species with contrasting root symbiotic relationships to investigate plant P acquisition in both tropical and subtropical forests. Both ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) trees responded positively to addition of inorganic P, but strikingly, ECM trees acquired more P from a complex organic form (phytic acid). Most ECM tree species and all AM tree species also showed some capacity to take up simple organic P (monophosphate). Mycorrhizal colonisation was negatively correlated with soil extractableP concentration, suggesting that mycorrhizal fungi may regulate organic P acquisition among tree species. Our results support the hypothesis that ECM and AM plants partition soil P sources, which may play an ecologically important role in promoting species coexistence in tropical and subtropical forests.
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