寄生植物调节连接寄主植物和邻近植物的普通菌根网络中的碳和氮分配。

IF 4.4 2区 环境科学与生态学 Q1 ECOLOGY
Ecology Pub Date : 2024-09-09 DOI:10.1002/ecy.4418
Yongge Yuan, Cheng Han, Jiani Wang, Junmin Li
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引用次数: 0

摘要

普通菌根网络(CMN)可以连接多种植物,并在它们之间分配养分。然而,寄生植物如何调节 CMN 与相连植物之间的碳和养分交换尚不清楚。因此,我们进行了一项容器实验,将两株原叶三叶草(Trifolium pratense)分别种植在两个塑料芯中,并在每个容器中使用 25 微米的尼龙网将它们仅通过 CMN 连接起来。寄主原叶三叶草被菟丝子寄生或不被菟丝子寄生。CMN保持完整,或通过与寄主或邻近的菟丝子一起旋转核心而断裂。采用 15N 和 13C 双标记法评估了 CMNs 向寄主和邻近 T. pratense 分配的 N,以及最近从寄主和邻近 T. pratense 固定到 CMNs 的 C。结果表明,CMNs 向未寄生的邻近 T. pratense 分配的 15N 多于寄生宿主 T. pratense。此外,与寄生宿主T. pratense相比,未寄生的邻近T. pratense为CMN提供了更多最近固定的C。这些结果表明,寄生虫按照互惠互利的规则调节 CMNs 与相连植物之间的 C 和养分交换。此外,这项研究还强调了寄生植物在调节生态网中互惠相互作用中的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Parasitic plants regulate C and N distribution among common mycorrhizal networks linking host and neighboring plants

Parasitic plants regulate C and N distribution among common mycorrhizal networks linking host and neighboring plants

Common mycorrhizal networks (CMNs) can link multiple plants and distribute nutrients among them. However, how parasitic plants regulate the carbon and nutrient exchange between CMNs and the linked plants is unknown. Thus, we conducted a container experiment with two Trifolium pratense grown in two plastic cores and connected only by CMNs using a 25-μm nylon fabric in each container. Host T. pratense was parasitized or not parasitized by Cuscuta gronovii. CMNs were left intact or broken by rotating the cores with the host or neighboring T. pratense. The dual 15N and 13C labeling method was used to evaluate the N distributed by CMNs to the host and neighboring T. pratense and the recently fixed C from the host and neighboring T. pratense to CMNs. The results showed that CMNs distributed more 15N to unparasitized neighboring T. pratense than the parasitized host T. pratense. Moreover, the unparasitized neighboring T. pratense provides more recently fixed C to CMNs than the parasitized host T. pratense. These results revealed that the parasite regulated C and nutrient exchange between CMNs and the linked plants following the reciprocal rewards rule. Moreover, this study highlights the importance of parasitic plants in the regulation of mutualistic interactions in ecological webs.

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来源期刊
Ecology
Ecology 环境科学-生态学
CiteScore
8.30
自引率
2.10%
发文量
332
审稿时长
3 months
期刊介绍: Ecology publishes articles that report on the basic elements of ecological research. Emphasis is placed on concise, clear articles documenting important ecological phenomena. The journal publishes a broad array of research that includes a rapidly expanding envelope of subject matter, techniques, approaches, and concepts: paleoecology through present-day phenomena; evolutionary, population, physiological, community, and ecosystem ecology, as well as biogeochemistry; inclusive of descriptive, comparative, experimental, mathematical, statistical, and interdisciplinary approaches.
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