Non-host plants: Are they mycorrhizal networks players?
Non-host plants: Are they mycorrhizal networks players?
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非寄主植物：它们是菌根网络的参与者吗？
DOI：
10.1016/j.pld.2021.06.005
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发表时间：
2022-03
期刊：
影响因子：
4.8
通讯作者：
Yu, Fuqiang
中科院分区：
文献类型：
--
作者：
Wang, Yanliang;He, Xinhua;Yu, Fuqiang
常见的菌根网络（CMN）是连接同一种或不同种的植物个体的网络，在营养和信号传输以及植物群落组织中起着重要的作用。然而，约有10%的陆地植物是非菌根植物，其根不形成任何公认的菌根类型;并且每种菌根真菌只能定殖有限数量的植物物种，导致许多非宿主植物不能与特定的菌根真菌建立典型的菌根共生。非菌根或非宿主植物是否以及如何能够参与CMN尚不清楚。在这里，我们总结了菌根介导的宿主和非宿主植物相互作用的研究重点。有证据表明，一些宿主支持的丛枝菌根（AM）和外生菌根（EM）菌丝可以进入非宿主植物的根系，但不形成典型的菌根结构，而这种非典型的菌根定殖往往抑制非宿主植物的生长，但增强诱导的系统抗性。同时，宿主生长也受到不同的影响，这取决于植物和真菌的种类。分子生物学分析表明，AMF在非寄主植物根中的定殖不同于病原真菌和内生真菌的定殖，非寄主植物根中的菌丝可能是活的，其功能尚不清楚。因此，我们建议，非寄主植物也是重要的CMNs球员。利用非菌根模式物种拟南芥、三方培养体系以及纳米级二次离子质谱和多组学等新技术，研究宿主和非宿主植物之间通过CMN进行的营养和信号传输，可能会为间作和农林复合系统的效益机制以及植物群落的建立和稳定性提供新的见解。菌根菌丝可以侵入或定殖于非寄主植物的根部，但不形成典型的菌根结构。植物生长和养分吸收受寄主、菌根真菌和非寄主的不同影响。AM菌丝、病原真菌和内生真菌在非寄主植物上的分子对话模式不同。我们建议，非寄主植物也参与了菌根网络，并讨论了未来在这方面的前景。
Common mycorrhizal networks (CMNs) that connect individual plants of the same or different species together play important roles in nutrient and signal transportation, and plant community organization. However, about 10% of land plants are non-mycorrhizal species with roots that do not form any well-recognized types of mycorrhizas; and each mycorrhizal fungus can only colonize a limited number of plant species, resulting in numerous non-host plants that could not establish typical mycorrhizal symbiosis with a specific mycorrhizal fungus. If and how non-mycorrhizal or non-host plants are able to involve in CMNs remains unclear. Here we summarize studies focusing on mycorrhizal-mediated host and non-host plant interaction. Evidence has showed that some host-supported both arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) hyphae can access to non-host plant roots without forming typical mycorrhizal structures, while such non-typical mycorrhizal colonization often inhibits the growth but enhances the induced system resistance of non-host plants. Meanwhile, the host growth is also differentially affected, depending on plant and fungi species. Molecular analyses suggested that the AMF colonization to non-hosts is different from pathogenic and endophytic fungi colonization, and the hyphae in non-host roots may be alive and have some unknown functions. Thus we propose that non-host plants are also important CMNs players. Using non-mycorrhizal model species Arabidopsis, tripartite culture system and new technologies such as nanoscale secondary ion mass spectrometry and multi-omics, to study nutrient and signal transportation between host and non-host plants via CMNs may provide new insights into the mechanisms underlying benefits of intercropping and agro-forestry systems, as well as plant community establishment and stability. Mycorrhizal hyphae could penetrate or colonize roots of non-host plants, without forming typical mycorrhizal structures. Plant growth and nutrient uptake could be variously affected by the tripartite of host, mycorrhizal fungi and non-host. Non-host plants colonized by AM hyphae, pathogenic and endophytic fungi showed different molecular dialogue patterns. We propose that non-host plants are also involved in mycorrhizal networks, and discuss future perspectives in this area.
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