定植于地衣体内的大团囊虫草新谱系  

New Lineages of Elaphocordyceps Harboring in Lichen Thalli

作　　者：姜岱峰 赵璐 郭虹[3] 王海英[1] 

机构地区：[1]山东师范大学生命科学学院逆境植物实验室,济南250014 [2]国立顺天大学韩国地衣研究所 [3]河北大学生命科学学院,石家庄071002

出　　处：《植物分类与资源学报》2015年第6期746-750,共5页Plant Diversity

基　　金：国家自然科学基金(31270059);山东省高校科研创新团队项目济南市自然科学基金(201202024)资助

摘　　要：大团囊虫草是一类寄生型真菌,绝大多数以大团囊菌为宿主,只有3个种寄生在甲虫和蝉的幼虫体内。我们从采集自中国五个省份和南极长城站的42份地衣标本中分离得到了64株大团囊虫草属真菌菌株,系统发育学分析表明,这些真菌可能不是相同的种类,显示有多个种类的大团囊虫草属真菌广泛定植于地衣体中。与高等植物共生的内生真菌通常对宿主的生长起到促进作用,然而,由于地衣内生真菌生长所需营养物质来源于地衣共生真菌或光合共生物,因此地衣内生真菌与共生真菌之间很有可能是寄生关系或竞争关系。本研究发现大团囊虫草广泛伴生在地衣体内,部分证实了这一假说的正确性。All species of Elaphocordyceps parasitize the fungal genus Elaphomyces, except for three species growing on scarabid beetle larvae or cicada nymphs. During our study on the diversity of cuhurable endolichenic fungi, some Elaphocordyceps species are found widely harboring in lichen thalli. A total of 64 fungal strains belonging to Elapho- cordyceps were isolated from 42 lichen samples respectively collected from 5 provinces of China and the Antarctic. Phylogenetic analysis based on ITS nrDNA shows that these endolichenic fungi are possibly heterospecific. The endo- phytic fungi of plant often provide benefits to their hosts. However, the endolichenic fungi may be parasites or nutri- ent competitors of the mycobiont, because they have to obtain nutrient components from mycobionts or photobionts. Our study partly proves this hypothesis, since most known species of Elaphocordyceps are parasites of fungi.

关 键 词：虫草属 地衣内生真菌 真菌宿主 ITS序列 

分 类 号：Q949.32[生物学—植物学]