Phylogenetic affinities of the sequestrate genus Rhodactina (Boletaceae), with a new species, R. rostratispora from Thailand.
Phylogenetic affinities of the sequestrate genus Rhodactina (Boletaceae), with a new species, R. rostratispora from Thailand.
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DOI：
10.3897/mycokeys.29.22572
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发表时间：
2018
期刊：
影响因子：
3.3
通讯作者：
Lumyong S
中科院分区：
文献类型：
--
作者：
Vadthanarat S;Raspé O;Lumyong S
红毛藻属Rhodactina是牛肝菌科的一个小的螯合属，目前已知有两个种，R. himalayensis和R.化身对红海葵属物种atp 6、tef 1和rpb 2三个基因数据集沿着牛肝菌科部分物种的系统发育分析表明，红海葵属所有物种形成了一个单系分支，与Leccinoideae亚科中的海绵属（Spongiforma）和Borofutus属（Borofutus）形成姊妹分支，支持率较高。分支中的所有分类群都有类似的化学反应，当与氢氧化钾接触时，担孢子会变成紫色，紫红色到紫色或紫灰色。分子生物学分析还表明，从泰国东北部乌汶省采集的所有Rhodactina标本都属于一个新种。在形态学上，新种与其它种的区别在于担孢子上有一个显著突出的脐附属物和一个顶生的脐。本文介绍了该新种--喙孢红海葵Rhodactinarostrispora，并对其进行了详细的宏观和微观描述和插图。
Rhodactina is a small sequestrate genus in Boletaceae with two described species, R. himalayensis and R. incarnata. Phylogenetic analyses of a three-gene dataset including atp6, tef1 and rpb2 of Rhodactina species along with selected Boletaceae species showed that all Rhodactina species formed a monophyletic clade, sister to the genera Spongiforma and Borofutus in subfamily Leccinoideae with high support. All of the taxa in the clade have a similar chemical reaction in which basidiospores turn purplish, purplish red to violet or violet grey when in contact with potassium hydroxide. The molecular analyses also showed that all Rhodactina specimens collected from Ubon Ratchathani province, northeastern Thailand, belong to a new species. Morphologically, the new species is different from others by having a markedly prominent hilar appendage and a terminal hilum on its basidiospores. Thus, the new species, Rhodactina rostratispora, is introduced with detailed macroscopic and microscopic descriptions and illustrations.
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