Multi-Gene Phylogeny and Taxonomy of Hypoxylon (Hypoxylaceae, Ascomycota) from China
Multi-Gene Phylogeny and Taxonomy of Hypoxylon (Hypoxylaceae, Ascomycota) from China
复制标题
中国Hypoxylon（Hypoxylaceae，子囊菌门）的多基因系统发育和分类
DOI：
10.3390/d14010037
复制
发表时间：
2022-01-01
期刊：
影响因子：
2.4
通讯作者：
Qu, Zhi
中科院分区：
文献类型：
--
作者：
Ma, Haixia;Song, Zikun;Qu, Zhi
次生木本植物在热带雨林中作为木材分解者起着重要的生态作用，其中一些可能作为内生植物对寄主产生有益的影响。本文对中国所在的海南热带雨林国家公园内的次木兰属植物进行了调查。根据形态特征和分子生物学特征，发现了四个新种：五指山毛藻、海南毛壳藻、金黄色毛壳菌和环斑毛壳菌。五指山次生孢子的特征是锈枕状基质、淀粉样顶器和棕色子囊孢子，周孢子在10%KOH中大部分不张开。海南次生孢子具渗出的垫状和紫罗兰色基质，淀粉样顶器，浅褐色至棕色的子囊孢子，胚缝直，周壁开裂。次木本金黄色孢子菌的特征是基质成团状到垫状，淀粉样顶器高度减少或缺失，子囊孢子淡褐色到棕色，有非常明显的卷曲状纹饰。次木本环果青冈具有淡紫色垫状基质，高度缩小的淀粉样顶器，淡蓝色，棕色子囊孢子和裂开的周孢子，生长在青冈枯枝上。提供了详细的描述、插图和与形态相似的种的对比。根据ITS、RPB2、LSU和β-微管蛋白序列进行的系统发育分析证实，这四个新种在次木兰属中是不同的。
The Hypoxylon species play an important ecological role in tropical rainforest as wood-decomposers, and some might have benefical effects on their hosts as endophytes. The present work concerns a survey of the genus Hypoxylon from Hainan Tropical Rainforest National Park of China. Four new species: H. wuzhishanense, H. hainanense, H.chrysalidosporum, and H.cyclobalanopsidis, were discovered based on a combination of morphological characteristics and molecular data. Hypoxylon wuzhishanense is characterized by Rust pulvinate stromata, amyloid apical apparatus and brown ascospores, with most of the perispore being indehiscent in 10% KOH. Hypoxylon hainanense has effused–pulvinate and Violet stromata, amyloid apical apparatus, light-brown to brown ascospores with straight germ slit and dehiscent perispore. Hypoxylonchrysalidosporum is distinguished by glomerate to pulvinate stromata, highly reduced or absent inamyloid apical apparatus, and light-brown to brown ascospores with very conspicuous coil-like ornamentation. Hypoxyloncyclobalanopsidis has Livid Purple pulvinate stromata, highly reduced amyloid apical apparatus, faint bluing, brown ascospores and dehiscent perispore, and it grows on dead branches of Cyclobalanopsis. Detailed descriptions, illustrations, and contrasts with morphologically similar species are provided. Phylogenetic analyses inferred from ITS, RPB2, LSU, and β-tubulin sequences confirmed that the four new species are distinct within the genus Hypoxylon.