Takashima Yusuke, Nakayama Takeshi, Degawa Yousuke
a Sugadaira Research Station, Mountain Science Center, University of Tsukuba.
b Graduate School of Life and Environmental Sciences, University of Tsukuba.
Mycoscience. 2021 Jul 20;62(4):260-267. doi: 10.47371/mycosci.2021.03.009. eCollection 2021.
Fungi-algae interactions, such as lichen-forming fungi and parasitic chytrids on phytoplankton, are common in ecosystems. In contrast, interactions between filamentous fungi and soil algae that can be observed with the naked eye have been given little attention and remain unexplored. Here, we report a fungus that was associated with a visible symptom of dead algae on a soil surface in Sugadaira-kogen, Nagano, central Japan. -like conidiophores were growing on vesicles and dead bodies of a yellow-green alga, . The fungus was identified as based on its morphology by microscopic observation, phylogenetic analysis, and the similarity of the isolation substrate with the first description of the species. Co-culture experiments showed a filamentous cell differentiation of the alga by the fungus, but no harmful or beneficial effects on algal growth. Therefore, we speculate that is a facultative parasite of under natural conditions.
真菌与藻类的相互作用，如形成地衣的真菌和浮游植物上的寄生壶菌，在生态系统中很常见。相比之下，丝状真菌与土壤藻类之间肉眼可见的相互作用却很少受到关注，仍有待探索。在这里，我们报告了一种与日本中部长野县菅平高原土壤表面藻类死亡的明显症状相关的真菌。类似分生孢子梗的结构生长在一种黄绿藻的囊泡和尸体上。通过显微镜观察、系统发育分析以及分离底物与该物种首次描述的相似性，将该真菌鉴定为[具体真菌名称]。共培养实验表明该真菌可使藻类发生丝状细胞分化，但对藻类生长没有有害或有益影响。因此，我们推测[具体真菌名称]在自然条件下是[具体藻类名称]的兼性寄生虫。
