@ARTICLE{TreeBASE2Ref31240, author = {Ariadne Nobrega Marinho Furtado and Ornella Comandini and Marco Leonardi and Andrea C. Rinaldi and Maria Alice Neves}, title = {Facing the Brazilian restinga diversity: Amanita viscidolutea ectomycorrhiza on Guapira opposita }, year = {2020}, keywords = {Amanitaceae, Atlantic Forest, Hartig net, Neotropical region, Nyctaginaceae}, doi = {}, url = {http://}, pmid = {}, journal = {Mycological Progress}, volume = {}, number = {}, pages = {}, abstract = {The current paradigm on ectomycorrhizae (ECMs) is that their diversity and distribution peak are at boreal and temperate areas of the globe while in the tropics ECM would be restricted to monotypic forests. However, new observations of ECM are popping up all around native neotropical and subtropical forests. In this work, we present in detail the morpho-anatomical and molecular characterization of a naturally occurring ECM formed by Amanita viscidolutea on Guapira opposita from the Atlantic Forest. Amanita viscidolutea is a conspicuous species with vibrant yellow pileus that is distributed in the restinga, a coastal biome of the Atlantic Forest. The restinga vegetation acts as a buffer between the ocean and the forest but it has been threatened by habitat loss and fragmentation. We sequenced the ITS rDNA region from fungi (ectomycorrhizae and basidiomata) and the plant to identify both symbionts from the root systems. The systematic position of the fungal symbiont was confirmed by Maximum Likelihood and Bayesian analyses. Amanita viscidolutea mycorrhizal system is long, up to 43 mm, mostly simple, unramified to irregularly pinnate. The mantle surface is velvety to slightly cottony, whitish yellow with silver patches. Although present, rhizomorphs are infrequent. Amanita viscidolutea ECM presents a clampless hyphal mantle, however, it is possible to find clamps sparsely distributed in the emanating hyphae and rhizomorphs. As a unique character of A. viscidolutea ectomycorrhizae on Guapira opposita, the presence of a Hartig net was not observed. This is the first report with complete morpho-anatomical and molecular characterization of a native Amanita ectomycorrhiza with a native plant host from South America. } }

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