Ectomycorrhizal fungi enhance pine growth by stimulating iron-dependent mechanisms with trade-offs in symbiotic performance

IF 8.3 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2023-12-07 DOI:10.1111/nph.19449

Kaile Zhang, Haihua Wang, Ryan Tappero, Jennifer M. Bhatnagar, Rytas Vilgalys, Kerrie Barry, Keykhosrow Keymanesh, Sravanthi Tejomurthula, Igor V. Grigoriev, William R. Kew, Elizabeth K. Eder, Carrie D. Nicora, Hui-Ling Liao

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引用次数: 0

Abstract

Iron (Fe) is crucial for metabolic functions of living organisms. Plants access occluded Fe through interactions with rhizosphere microorganisms and symbionts. Yet, the interplay between Fe addition and plant–mycorrhizal interactions, especially the molecular mechanisms underlying mycorrhiza-assisted Fe processing in plants, remains largely unexplored.
We conducted mesocosms in Pinus plants inoculated with different ectomycorrhizal fungi (EMF) Suillus species under conditions with and without Fe coatings. Meta-transcriptomic, biogeochemical, and X-ray fluorescence imaging analyses were applied to investigate early-stage mycorrhizal roots.
While Fe addition promoted Pinus growth, it concurrently reduced mycorrhiza formation rate, symbiosis-related metabolites in plant roots, and aboveground plant carbon and macronutrient content. This suggested potential trade-offs between Fe-enhanced plant growth and symbiotic performance. However, the extent of this trade-off may depend on interactions between host plants and EMF species. Interestingly, dual EMF species were more effective at facilitating plant Fe uptake by inducing diverse Fe-related functions than single-EMF species. This subsequently triggered various Fe-dependent physiological and biochemical processes in Pinus roots, significantly contributing to Pinus growth. However, this resulted in a greater carbon allocation to roots, relatively reducing the aboveground plant carbon content.
Our study offers critical insights into how EMF communities rebalance benefits of Fe-induced effects on symbiotic partners.

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外生菌根真菌通过刺激铁依赖机制促进松树生长，共生性能需权衡取舍

铁(Fe)对生物体的代谢功能至关重要。植物通过与根际微生物和共生体的相互作用获取铁。然而，铁添加与植物-菌根相互作用之间的相互作用，特别是菌根辅助铁在植物中加工的分子机制，在很大程度上仍未被探索。用不同的外生菌根真菌(EMF) Suillus种接种松木，在有铁涂层和没有铁涂层的条件下进行了中观实验。Meta转录组学、生物地球化学和X射线荧光成像分析应用于研究早期菌根。添加铁促进了松的生长，但同时降低了菌根形成速率、植物根系中共生相关代谢物以及地上部植物碳和常量营养素含量。这表明铁促进植物生长和共生性能之间存在潜在的权衡。然而，这种权衡的程度可能取决于寄主植物和EMF物种之间的相互作用。有趣的是，双EMF物种比单EMF物种更有效地通过诱导不同的铁相关功能来促进植物铁的吸收。这随后引发了各种铁依赖的生理生化过程在松树的根，显著促进了松树的生长。然而，这导致了更多的碳分配给根系，相对降低了地上植物的碳含量。我们的研究为EMF群落如何重新平衡铁对共生伙伴的影响提供了重要的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.