Wisitrassameewong Komsit, Manz Cathrin, Hampe Felix, Looney Brian P, Boonpratuang Thitiya, Verbeken Annemieke, Thummarukcharoen Tuksaporn, Apichitnaranon Tanakorn, Pobkwamsuk Maneerat, Caboň Miroslav, Adamčík Slavomír
National Biobank of Thailand, National Science and Technology Development Agency (NSTDA), Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand.
Mycology Research Group, Faculty of Biological Sciences, Goethe University Frankfurt am Main, Max-von-Laue Straße 13, 60438, Frankfurt am Main, Germany.
Sci Rep. 2022 Feb 18;12(1):2826. doi: 10.1038/s41598-022-06836-x.
Dry dipterocarp forests are among the most common habitat types in Thailand. Russulaceae are known as common ectomycorrhizal symbionts of Dipterocarpaceae trees in this type of habitat. The present study aims to identify collections of Russula subsection Amoeninae Buyck from dry dipterocarp forests in Thailand. A multi-locus phylogenetic analysis placed Thai Amoeninae collections in two novel lineages, and they are described here as R. bellissima sp. nov. and R. luteonana sp. nov. The closest identified relatives of both species were sequestrate species suggesting that they may belong to drought-adapted lineages. An analysis of publicly available ITS sequences in R. subsect. Amoeninae did not confirm evidence of any of the new species occurring in other Asian regions, indicating that dry dipterocarp forests might harbor a novel community of ectomycorrhizal fungi. Macromorphological characters are variable and are not totally reliable for distinguishing the new species from other previously described Asian Amoeninae species. Both new species are defined by a combination of differentiated micromorphological characteristics in spore ornamentation, hymenial cystidia and hyphal terminations in the pileipellis. The new Amoeninae species may correspond to some Russula species collected for consumption in Thailand, and the detailed description of the new species can be used for better identification of edible species and food safety in the region.
干旱龙脑香林是泰国最常见的栖息地类型之一。红菇科是这种栖息地类型中龙脑香科树木常见的外生菌根共生体。本研究旨在鉴定来自泰国干旱龙脑香林的美丽红菇亚组的红菇属标本。多基因系统发育分析将泰国美丽红菇亚组标本置于两个新谱系中，在此将它们描述为美丽红菇新种和淡黄红菇新种。这两个物种最接近的已鉴定亲缘种是地下生物种，表明它们可能属于适应干旱的谱系。对美丽红菇亚组公开可用的ITS序列分析未证实其他亚洲地区存在任何新物种的证据，这表明干旱龙脑香林可能蕴藏着一个新的外生菌根真菌群落。宏观形态特征具有变异性，对于将新物种与其他先前描述的亚洲美丽红菇亚组物种区分开来并不完全可靠。这两个新物种均由孢子纹饰、子实层囊状体和菌盖表皮菌丝末端的不同微观形态特征组合来定义。新的美丽红菇亚组物种可能与泰国采集用于食用的一些红菇属物种相对应，新物种的详细描述可用于该地区可食用物种的更好鉴定和食品安全。
