在干旱胁迫下,常见的菌根网络改善了吉氏穿心莲幼苗的生存并介导了植物间的促进相互作用。

IF 3.8 2区 生物学 Q2 MYCOLOGY
Margaret Russell, Veronika Řezáčová, Kirby Shane Miller, Wynter Helene Nardi, Morgan Brown, Joanna Weremijewicz
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引用次数: 0

摘要

在干旱条件下,丛枝菌根(AM)真菌可以通过促进水通过广泛的菌丝网络的运动来改善植物的性能。当这些网络在共同菌根网络(CMNs)中连接邻近植物时,CMNs可能在许多个体之间分配水分。然而,cmn介导的水分运动对植物相互作用的影响在很大程度上是未知的。我们在目标盆栽实验中,以浇水(浇水或长期干旱)和CMN状态(完整或切断)作为处理,开始研究CMN介导的gerardii Andropogon幼苗之间的相互作用。完整的CMNs提高了干旱胁迫下幼苗的存活率,并在两种浇水处理中介导了积极的、促进的植物相互作用。浇水增加了菌根定植率,改善了磷的吸收,特别是对大型个体。在干旱条件下,改善对水的获取很可能有利于相邻植物通过CMNs相互作用。CMNs似乎在每个处理中提供了最有限的资源,无论是磷、水,还是两者兼有,从而提高了生存和生长。大型光合作用固定目标植物附近的邻居可能受益于它们建立的广泛的菌丝网络,这些菌丝网络可以在土壤微孔中获取水和溶解的磷。在植物群落中,CMNs在干旱期间可能是至关重要的,预计干旱的频率、强度和长度将随着气候变化而增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Common mycorrhizal networks improve survival and mediate facilitative plant interactions among Andropogon gerardii seedlings under drought stress.

Common mycorrhizal networks improve survival and mediate facilitative plant interactions among Andropogon gerardii seedlings under drought stress.

Common mycorrhizal networks improve survival and mediate facilitative plant interactions among Andropogon gerardii seedlings under drought stress.

Common mycorrhizal networks improve survival and mediate facilitative plant interactions among Andropogon gerardii seedlings under drought stress.

Under drought conditions, arbuscular mycorrhizal (AM) fungi may improve plant performance by facilitating the movement of water through extensive hyphal networks. When these networks interconnect neighboring plants in common mycorrhizal networks (CMNs), CMNs are likely to partition water among many individuals. The consequences of CMN-mediated water movement for plant interactions, however, are largely unknown. We set out to examine CMN-mediated interactions among Andropogon gerardii seedlings in a target-plant pot experiment, with watering (watered or long-term drought) and CMN status (intact or severed) as treatments. Intact CMNs improved the survival of seedlings under drought stress and mediated positive, facilitative plant interactions in both watering treatments. Watering increased mycorrhizal colonization rates and improved P uptake, particularly for large individuals. Under drought conditions, improved access to water most likely benefited neighboring plants interacting across CMNs. CMNs appear to have provided the most limiting resource within each treatment, whether P, water, or both, thereby improving survival and growth. Neighbors near large, photosynthate-fixing target plants likely benefited from their establishment of extensive hyphal networks that could access water and dissolved P within soil micropores. In plant communities, CMNs may be vital during drought, which is expected to increase in frequency, intensity, and length with climate change.

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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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