School of Agriculture, Forest and Environmental Sciences, Clemson University, Clemson, SC, USA.
Mycologia. 2013 Jan-Feb;105(1):34-51. doi: 10.3852/12-041. Epub 2012 Sep 6.
Ascobotryozyma (anamorph Botryozyma) is an ascomycetous yeast genus characterized by its unusual morphology and ability to attach to free-living nematodes in the genus Panagrellus. Other than species descriptions for four taxa little is known about these yeasts. Investigations were carried out to determine the ecological relationship and specificity with nematodes in addition to examining basic cell structure, thallus development and sexual reproduction. Based on previous examinations of the yeast and nematode it was hypothesized the fungus did not parasitize the nematode but instead remained attached to nematodes for dispersal. Electron micrographs supported our hypotheses and revealed a specialized cell wall and mucilage that aid in attachment to the nematode cuticle. Tests to determine the ability of Ascobotryozyma and Botryozyma to attach to different nematode taxa revealed that attachment varies across taxonomic groups. Examinations of thallus cells, thallus growth, cell fusion and ascosporogenesis are presented. This study provides insight into an otherwise cryptic yeast genus.
Ascobotryozyma（异形 Botryozyma）是一种子囊菌酵母属，其特征为不寻常的形态和能够附着在自由生活的 Panagrellus 属线虫上。除了对四个分类群的物种描述外，人们对这些酵母知之甚少。除了检查基本细胞结构、菌核发育和有性生殖外，还进行了调查以确定与线虫的生态关系和特异性。基于之前对酵母和线虫的检查，假设真菌不会寄生线虫，而是附着在线虫上以进行传播。电子显微镜照片支持了我们的假设，并揭示了一种特殊的细胞壁和黏液，有助于附着在线虫的角质层上。测试以确定 Ascobotryozyma 和 Botryozyma 附着在不同线虫分类群的能力表明，附着在不同的分类群中有所不同。介绍了菌核细胞、菌核生长、细胞融合和子囊孢子发生的检查。本研究深入了解了一个原本隐秘的酵母属。
