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首页> 外文期刊>Mycologia >Interannual variation and host affiliations of endophytic fungi associated with ferns at La Selva, Costa Rica.
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Interannual variation and host affiliations of endophytic fungi associated with ferns at La Selva, Costa Rica.

机译：哥斯达黎加拉塞尔瓦的蕨类植物与内生真菌的年际变化和寄主关系。

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摘要

Ferns are an ancient and diverse lineage of vascular plants that differ morphologically, chemically and in growth habits from the angiosperms with which they co-occur. We used a culture-based approach coupled with phylogenetic analyses to characterize the incidence, diversity and composition of fungal endophyte assemblages in ferns, with a focus on healthy aboveground tissues of seven species of eupolypods at La Selva, Costa Rica. Endophytes were isolated from every individual plant and were similarly abundant and diverse in frond blades and stalks, in different vegetation types, in epiphytic vs. terrestrial species, and between sampling years. However, abundance, diversity and community structure differed significantly among fern species, and composition differed markedly between sampling years. Phylogenetic classification using separate and combined datasets revealed that as for many Neotropical angiosperms, the majority (95%) of endophyte taxa were Ascomycota, with particular dominance by Sordariomycetes, Eurotiomycetes and Dothideomycetes. However, our data suggest higher phylogenetic richness and stronger host affinities in fern associated endophytes relative to those studied in angiosperms thus far.
机译：蕨类植物是一种古老而多样的维管植物谱系，其形态，化学和生长习性与它们共同存在的被子植物不同。我们使用了一种基于文化的方法，并结合系统发育分析来表征蕨类真菌内生真菌组合的发生率，多样性和组成，重点研究哥斯达黎加拉塞尔瓦的七种真足动物的健康地上组织。内生植物是从每种植物中分离出来的，在叶片和茎秆，不同的植被类型，附生与陆生物种以及采样年之间具有相似的丰富多样。但是，蕨类物种的丰度，多样性和群落结构差异显着，并且采样年之间的组成也明显不同。使用单独的和合并的数据集进行的系统发育分类显示，对于许多新热带被子植物而言，内生菌类群的大部分（95％）是子囊菌，其中Sordariomycetes，Eurotiomycetes和Dothideomycetes尤为优势。然而，我们的数据表明，与迄今为止在被子植物中研究的那些相比，蕨类相关内生菌具有更高的系统发育丰富性和更强的宿主亲和力。

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