Ectomycorrhizal fungi enhance pine growth by stimulating iron-dependent mechanisms with trade-offs in symbiotic performance.
Suillus
X-ray micro-fluorescence
ectomycorrhizal fungi
iron cycling
meta-transcriptomics
nuclear magnetic resonance spectroscopy
Journal
The New phytologist
ISSN: 1469-8137
Titre abrégé: New Phytol
Pays: England
ID NLM: 9882884
Informations de publication
Date de publication:
07 Dec 2023
07 Dec 2023
Historique:
received:
05
10
2023
accepted:
13
11
2023
medline:
8
12
2023
pubmed:
8
12
2023
entrez:
8
12
2023
Statut:
aheadofprint
Résumé
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.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Biological and Environmental Research
ID : DE-SC0012704
Organisme : Biological and Environmental Research
ID : DE-SC0020403
Organisme : Division of Integrative Organismal Systems
ID : 2029168
Organisme : National Institute of Food and Agriculture
ID : 1026825
Organisme : National Institute of Food and Agriculture
ID : 7001162
Informations de copyright
© 2023 Battelle Memorial Institute. Brookhaven Science Associates, LLC and The Authors. New Phytologist © 2023 New Phytologist Foundation This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
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