Symbiotic control of canopy dominance in subtropical and tropical forests
Symbiotic control of canopy dominance in subtropical and tropical forests
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DOI：
10.1016/j.tplants.2023.03.027
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发表时间：
2023-08-09
影响因子：
20.5
通讯作者：
Burslem，David F. R. P.
中科院分区：
文献类型：
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作者：
Johnson，David;Liu，Xubing;Burslem，David F. R. P.
亚洲的亚热带和热带森林通常包括与外生菌根真菌形成共生的树冠优势树木，以及与丛枝菌根真菌形成共生的物种丰富的下层树木。我们提出了一个良性磷收购假说来解释这种独特的结构。该假说基于（i）幼苗被来自已建立的菌丝体网络的外生菌根真菌快速定殖，所述菌丝体网络产生正反馈和对病原体的抗性，（ii）外生菌根真菌已经进化出一套形态、生理和分子特征，以使它们能够从多种化学形式（包括有机形式）中捕获磷，和（iii）来自成年寄主植物的光合作用碳的分配，以提供进行这些过程所需的能量。
Subtropical and tropical forests in Asia often comprise canopy dominant trees that form symbioses with ectomycorrhizal fungi, and species-rich understorey trees that form symbioses with arbuscular mycorrhizal fungi. We propose a virtuous phosphorus acquisition hypothesis to explain this distinct structure. The hypothesis is based on (i) seedlings being rapidly colonised by ectomycorrhizal fungi from established mycelial networks that generates positive feedback and resistance to pathogens, (ii) ectomycorrhizal fungi having evolved a suite of morphological, physiological, and molecular traits to enable them to capture phosphorus from a diversity of chemical forms, including organic forms, and (iii) allocation of photosynthate carbon from adult host plants to provide the energy needed to undertake these processes.