融雪条件下外生菌根真菌群落α和β多样性的降低:不同寄主来源和光照条件下沙沙林冷杉普通园林试验的亮点

IF 3.8 2区 生物学 Q2 MYCOLOGY
Yoriko Sugiyama, Shunsuke Matsuoka, Wataru Ishizuka, Tetsuto Sugai
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引用次数: 0

摘要

外生菌根(ECM)真菌的群落结构具有典型的时间动态特征。然而,在以ECM树为主的温带至寒带森林中,大雪覆盖阻碍了地下调查,并且冬季ECM真菌群落结构的动态尚未完全阐明。考虑到北方针叶树对融雪的响应,需要研究ECM真菌群落对融雪的响应。本研究以常绿针叶林冷杉(Abies sachalinensis)幼树为研究对象,研究了在融雪开始和结束后与幼树相关的ECM真菌,以推测融雪季节的群落动态及其对寄主树条件的敏感性。在两种不同降雪条件下(大与少)生长的树苗在两种不同光照条件下(开放与阴影)生长,并比较了这些组合下ECM真菌群落的动态模式。不同处理对ECM真菌群落结构的响应不同;虽然在遮荫条件下生长的强降雪区幼树的ECM真菌操作分类单位(OTUs)有显著的损失,但在整个融雪季节,其他组合的群落结构没有变化。融雪后非生物条件发生变化,但群落组成的稳定性,以及寄主来源和光照条件对群落动态模式的影响,表明融雪季节寄主介导的ECM真菌群落动态的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reduction of the α and β diversity of ectomycorrhizal fungal community under snowmelt: highlights from a common garden trial using Abies sachalinensis with differing host origins and light condition.

The community structure of ectomycorrhizal (ECM) fungi typically displays temporal dynamics. However, heavy snow cover hinders belowground investigations in temperate-to-boreal forests where ECM trees dominate, and the dynamics of the ECM fungal community structure during winter have not been fully elucidated. Given that boreal conifer species start root production in response to snowmelt, studies on the response of the ECM fungal community to snowmelt are needed. In the present study, to infer the community dynamics during the snowmelt season and their susceptibility to host tree conditions, we investigated ECM fungi associated with saplings of the evergreen conifer Abies sachalinensis immediately after the start and end of snowmelt in a common garden experiment. Saplings derived from two sources of contrasting snowfall conditions (heavy vs. little) were grown under two different light conditions (open vs. shaded), and the ECM fungal community dynamics patterns were compared across these combinations. The response of the ECM fungal community structure varied across treatments; although significant loss of ECM fungal operational taxonomic units (OTUs) was observed when saplings from the heavy snowfall region were grown under shade conditions, no change in community structure across the snowmelt season was observed for the other combinations. The stability of community composition despite the change in abiotic conditions with snowmelt, together with the effects of host origin and light conditions on community dynamics patterns, would imply the importance of host-mediated community dynamics of ECM fungi during the snowmelt season.

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来源期刊
Mycorrhiza
Mycorrhiza 生物-真菌学
CiteScore
8.20
自引率
2.60%
发文量
40
审稿时长
6-12 weeks
期刊介绍: Mycorrhiza is an international journal devoted to research into mycorrhizas - the widest symbioses in nature, involving plants and a range of soil fungi world-wide. The scope of Mycorrhiza covers all aspects of research into mycorrhizas, including molecular biology of the plants and fungi, fungal systematics, development and structure of mycorrhizas, and effects on plant physiology, productivity, reproduction and disease resistance. The scope also includes interactions between mycorrhizal fungi and other soil organisms and effects of mycorrhizas on plant biodiversity and ecosystem structure. Mycorrhiza contains original papers, short notes and review articles, along with commentaries and news items. It forms a platform for new concepts and discussions, and is a basis for a truly international forum of mycorrhizologists from all over the world.
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