The genus Xanthoconium (Boletaceae, Boletales) in tropical China
The genus Xanthoconium (Boletaceae, Boletales) in tropical China
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中国热带地区的黄花属（Boletaceae，Boletales）
DOI：
10.11646/phytotaxa.295.3.5
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发表时间：
2017-02-10
期刊：
影响因子：
1.1
通讯作者：
Zeng, Nian-Kai
中科院分区：
文献类型：
--
作者：
Liang, Zhi-Qun;Chai, Hui;Zeng, Nian-Kai
通过形态学和分子生物学分析，对中国热带地区的黄锥属（Xanthoconium）植物进行了研究，并对核28 S rDNA D1-D2区（28 S）、翻译延伸因子1-α基因（TEF 1）和RNA聚合酶Ⅱ第二大亚基基因（RPB 2）进行了分析。在该地区有两个种，一个是以前描述的分类单元：X。sinensis，另一种为新描述：X.棕头褐头黄锥菌（Xanthoconium fusciceps）的形态特征为：菌盖深褐色，表面微皱或具纹孔，不着色的子实梗和内托，金黄色担孢子，囊胞，囊胞胞内有淡黄褐色、黄褐色至金棕色色素，菌盖内的菌丝不膨大。文中对这两个类群的形态、显微结构作了详细的描述，并提供了新鲜担子果的彩色照片和线条图。
The collections of Xanthoconium from tropical China are investigated on the basis of morphology and molecular phyloge-netic analyses of DNA sequences from the nuc 28S rDNA D1-D2 domains (28S), the translation elongation factor 1-alpha gene (TEF1) and RNA polymerase II second largest subunit gene (RPB2). Two species are recognized in the region, one is the previously described taxon: X. sinensis, the other is described as new: X. fusciceps. Xanthoconium fusciceps is morphologi-cally characterized by a dark brown pileus with a rugulose or pitted surface, non-staining hymenophore and context, golden yellow basidiospores, cystidia with pale yellowish brown, yellowish brown to golden brown pigments, and uninflated hy-phae in the pileipellis. Detailed descriptions, color photos of fresh basidiomata and line-drawings of microstructures of the two taxa are presented.