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首页> 外文期刊>Mycologia >Paleomycology of the Princeton Chert II. Dark-septate fungi in the aquatic angiosperm Eorhiza arnoldii indicate a diverse assemblage of root-colonizing fungi during the Eocene
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Paleomycology of the Princeton Chert II. Dark-septate fungi in the aquatic angiosperm Eorhiza arnoldii indicate a diverse assemblage of root-colonizing fungi during the Eocene

机译：普林斯顿彻特二世的古生物学。水生被子植物Eorhiza arnoldii中的深色分隔真菌表明始新世期间根定殖真菌的多样性

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摘要

Tissues of the extinct aquatic or emergent angiosperm, Eorhiza arnoldii incertae sedis, were extensively colonized by microfungi, and in this study we report the presence of several types of sterile mycelia. In addition to inter- and intracellular proliferation of regular septate hyphae, the tissues contain monilioid hyphae with intercalary branching. These filamentous mycelia are spatially associated with two distinct morphotypes of intracellular microsclerotia. These quiescent structures are morphologically similar to loose and cerebriform microsclerotia found within the living tissues of some plants, which have been attributed to an informal assemblage of dematiaceous ascomycetes, the dark-septate endophytes. While there are significant challenges to interpreting the ecology of fossilized fungi, these specimens provide evidence for asymptomatic endophytic colonization of the rooting structures of a 48.7 million year old aquatic angiosperm.
机译：已灭绝的水生或被子植物被子虫（Eorhiza arnoldii incertae sedis）的组织被微真菌广泛地定殖，在这项研究中我们报告了几种不育菌丝体的存在。除了规则分隔菌丝的细胞间和细胞内增殖外，组织中还含有带inter间分支的单核菌丝菌丝。这些丝状菌丝体在空间上与细胞内微菌核的两种不同形态型有关。这些静态结构在形态上类似于某些植物的活组织中发现的松散的和脑形的微核菌，这归因于血吸虫子囊菌（深色分隔的内生菌）的非正式组装。尽管解释化石真菌的生态面临重大挑战，但这些标本为无症状内生菌落定殖证明了4870万岁水生被子植物生根结构的证据。

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