Ericoid mycorrhiza: a partnership that exploits harsh edaphic conditions
Ericoid mycorrhiza: a partnership that exploits harsh edaphic conditions
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DOI：
10.1046/j.1351-0754.2003.0555.x
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发表时间：
2003-12-01
影响因子：
4.2
通讯作者：
Meharg, AA
中科院分区：
文献类型：
--
作者：
Cairney, JWG;Meharg, AA
形成杜鹃花菌根群落的植物广泛分布在恶劣的生境中。杜鹃花菌根真菌内生菌是一个遗传多样性的群体，它们似乎能够减轻某些环境压力，从而促进杜鹃花科植物的建立和生存。一些形成杜鹃花菌根的真菌类群，或至少密切相关的菌株，也与其他植物宿主（树木和叶苔）形成关联。然而，杜鹃花科和其他植物类群之间的这些关联和推定的菌丝体联系的功能意义仍不清楚。来自有毒金属污染环境的证据表明，环状菌根真菌内生菌，在某些情况下，它们的植物宿主，可以进化出对这些金属的抗性。这些内生菌明显具有产生抗性的能力，使得杜鹃花菌根植物能够在污染的土壤中定殖。这似乎是杜鹃花菌根类群在一系列恶劣环境中取得成功的主要因素。
Plants that form ericoid mycorrhizal associations are widespread in harsh habitats. Ericoid mycorrhizal fungal endophytes are a genetically diverse group, and they appear to be able to alleviate certain environmental stresses and so facilitate the establishment and survival of Ericaceae. Some of the fungal taxa that form ericoid mycorrhizas, or at least closely related strains, also form associations with other plant hosts (trees and leafy liverworts). The functional significance of these associations and putative mycelial links between Ericaceae and other plant taxa, however, remain unclear. Evidence from environments that are contaminated by toxic metals indicates that ericoid mycorrhizal fungal endophytes, and in some instances their plant hosts, can evolve resistance to these metals. The apparent ability of these endophytes to develop resistance enables ericoid mycorrhizal plants to colonize polluted soil. This seems to be a major factor in the success of ericoid mycorrhizal taxa in a range of harsh environments.