Genetic diversity of termite-egg mimicking fungi “termite balls” within the nests of termites
Genetic diversity of termite-egg mimicking fungi “termite balls” within the nests of termites
复制标题
白蚁巢内模仿白蚁卵的真菌“白蚁球”的遗传多样性
DOI：
10.1007/s00040-010-0116-z
复制
发表时间：
2011
期刊：
影响因子：
1.3
通讯作者：
C. Tanaka
中科院分区：
文献类型：
--
作者：
T. Yashiro;K. Matsuura;C. Tanaka
昆虫和真菌之间的拮抗或互惠相互作用是众所周知的，而真菌生长的蚂蚁、真菌生长的白蚁和真菌园艺甲虫与它们各自的真菌互惠相互作用是共同进化的典型例子。然而，我们对昆虫和真菌之间共同进化相互作用的理解是基于几个模型系统的。白蚁卵的真菌模仿是昆虫-真菌结合的最显著的进化结果之一。这种新的白蚁-真菌相互作用是一个很好的模型系统，可以与真菌生长的蚂蚁和白蚁的相对较好的研究系统进行比较，因为白蚁卵模仿真菌在群居昆虫的巢穴中受到保护，真菌生长的蚂蚁和白蚁培育的真菌也是如此。近年来，在真菌生长的蚂蚁和白蚁系统中，人们越来越关注包括单一栽培系统在内的共同因素对共生最终进化稳定性的影响。我们研究了宿主白蚁巢中白蚁卵模拟真菌的遗传多样性。RFLP分析表明，与真菌生长的蚂蚁和白蚁的真菌巢中的单一菌株相比，白蚁巢经常被多株模拟白蚁卵的真菌感染。此外，系统发育分析表明，白蚁卵模拟真菌存在一个自由生活阶段，并且通过孢子和随后的水平传播频繁地进行长距离基因流动。将这些结果与先前对真菌生长的蚂蚁和白蚁的研究进行比较表明，尽管实现遗传多样性的机制因组成物种的进化史而异，但群居昆虫巢穴中真菌共生体的遗传多样性水平可能对形成共同进化相互作用的结果很重要。
Antagonistic or mutualistic interactions between insects and fungi are well-known, and the mutualistic interactions of fungus-growing ants, fungus-growing termites, and fungus-gardening beetles with their respective fungal mutualists are model examples of coevolution. However, our understanding of coevolutionary interactions between insects and fungi has been based on a few model systems. Fungal mimicry of termite eggs is one of the most striking evolutionary consequences of insect–fungus associations. This novel termite–fungus interaction is a good model system to compare with the relatively well-studied systems of fungus-growing ants and termites because termite egg-mimicking fungi are protected in the nests of social insects, as are fungi cultivated by fungus-growing ants and termites. Recently, among systems of fungus-growing ants and termites, much attention has been focused on common factors including monoculture system for the ultimate evolutionary stability of mutualism. We examined the genetic diversity of termite egg-mimicking fungi within host termite nests. RFLP analysis demonstrated that termite nests were often infected by multiple strains of termite egg-mimicking fungi, in contrast to single-strain monocultures in fungus combs of fungus-growing ants and termites. Additionally, phylogenetic analyses indicated the existence of a free-living stage of the termite egg-mimicking fungus as well as frequent long-distance gene flow by spores and subsequent horizontal transmission. Comparisons of these results with previous studies of fungus-growing ants and termites suggest that the level of genetic diversity of fungal symbionts within social insect nests may be important in shaping the outcome of the coevolutionary interaction, despite the fact that the mechanism for achieving genetic diversity varies with the evolutionary histories of the component species.
登录
查看更多内容
DOI：
10.1098/rspb.2005.3434
发表时间：
2006-05
期刊：
Proceedings of the Royal Society B: Biological Sciences
影响因子：
--
作者：
K. Matsuura
通讯作者：
K. Matsuura
Katoh H、Miura T、Maekawa K、Shinzato N、Matsumoto T.：“琉球群岛大白蚁 Odontotermes formosanus（等翅目：白蚁科）培育的共生真菌的遗传变异”分子生态学。
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--
影响因子：
2.6
作者：
T. Sugita;Mami Tajima;M. Amaya;R. Tsuboi;A. Nishikawa
通讯作者：
T. Sugita;Mami Tajima;M. Amaya;R. Tsuboi;A. Nishikawa
影响因子：
9.2
作者：
Matsuura, Kenji;Yashiro, Toshihisa;Tamura, Takashi
通讯作者：
Tamura, Takashi