Extreme specificity in epiparasitic Monotropoideae (Ericaceae): widespread phylogenetic and geographical structure
Extreme specificity in epiparasitic Monotropoideae (Ericaceae): widespread phylogenetic and geographical structure
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DOI：
10.1046/j.1365-294x.2001.01358.x
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发表时间：
2001-09-01
影响因子：
4.9
通讯作者：
Bruns, TD
中科院分区：
文献类型：
--
作者：
Bidartondo, MI;Bruns, TD
杜鹃花科（Monotropoideae）是一种非光合植物，其固定碳来源于真菌菌根。为了推断这种共生的进化历史，我们确定了植物和真菌的谱系涉及使用分子系统发育的方法筛选331株植物，代表10所描述的12个物种。对于五个物种没有事先的分子数据;对于三个物种，我们证实了以前的研究，使用有限的样品;对于五个物种，所有以前的报告与我们的结果相冲突，这是由多个样品的序列分析支持，并与宿主植物的系统发育模式一致。系统发育模式表明：（1）所鉴定的13个植物系统发育谱系分别专属于外生菌根担子菌的5个科中的不同属或种组;（2）菌根特异性与真菌发生相关;（3）在同域共生中，即使真菌与植物密切相关，成熟植物真菌共生体也没有重叠;及（iv）特异性存在地理模式。
The Monotropoideae (Ericaceae) are nonphotosynthetic plants that obtain fixed carbon from their fungal mycorrhizal associates. To infer the evolutionary history of this symbiosis we identified both the plant and fungal lineages involved using a molecular phylogenetic approach to screen 331 plants, representing 10 of the 12 described species. For five species no prior molecular data were available; for three species we confirmed prior studies which used limited samples; for five species all previous reports are in conflict with our results, which are supported by sequence analysis of multiple samples and are consistent with the phylogenetic patterns of host plants. The phylogenetic patterns observed indicate that: (i) each of the 13 plant phylogenetic lineages identified is specialized to a different genus or species group within five families of ectomycorrhizal Basidiomycetes; (ii) mycorrhizal specificity is correlated with phylogeny, (iii) in sympatry there is no overlap in mature plant fungal symbionts even if the fungi and the plants are closely related; and (iv) there are geographical patterns to specificity.