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CC BY-NC V4.0, Open Access
Journal article
Facilitative and competitive interactions between mycorrhizal and nonmycorrhizal plants in an extremely phosphorus-impoverished environment: role of ectomycorrhizal fungi and native oomycete pathogens in shaping species coexistence
The New phytologist, Early View
2023
PMID: 38105548
Abstract
Nonmycorrhizal cluster root-forming species enhance the phosphorus (P) acquisition of mycorrhizal neighbours in P-impoverished megadiverse systems. However, whether mycorrhizal plants facilitate the defence of nonmycorrhizal plants against soil-borne pathogens, in return and via their symbiosis, remains unknown.
We characterised growth and defence-related compounds in Banksia menziesii (nonmycorrhizal) and Eucalyptus todtiana (ectomycorrhizal, ECM) seedlings grown either in monoculture or mixture in a multifactorial glasshouse experiment involving ECM fungi and native oomycete pathogens.
Roots of B. menziesii had higher levels of phytohormones (salicylic and jasmonic acids, jasmonoyl-isoleucine and 12-oxo-phytodienoic acid) than E. todtiana which further activated a salicylic acid-mediated defence response in roots of B. menziesii, but only in the presence of ECM fungi. We also found that B. menziesii induced a shift in the defence strategy of E. todtiana, from defence-related secondary metabolites (phenolic and flavonoid) towards induced phytohormone response pathways.
We conclude that ECM fungi play a vital role in the interactions between mycorrhizal and nonmycorrhizal plants in a severely P-impoverished environment, by introducing a competitive component within the facilitation interaction between the two plant species with contrasting nutrient-acquisition strategies. This study sheds light on the interplay between beneficial and detrimental soil microbes that shape plant-plant interaction in severely nutrient-impoverished ecosystems.
Details
- Title
- Facilitative and competitive interactions between mycorrhizal and nonmycorrhizal plants in an extremely phosphorus-impoverished environment: role of ectomycorrhizal fungi and native oomycete pathogens in shaping species coexistence
- Authors/Creators
- Clement E. Gille - Univ Western Australia, Sch Biol Sci, 35 Stirling Highway, Perth, WA 6009, AustraliaPatrick M. Finnegan - Univ Western Australia, Sch Biol Sci, 35 Stirling Highway, Perth, WA 6009, AustraliaPatrick E. Hayes - Univ Western Australia, Sch Biol Sci, 35 Stirling Highway, Perth, WA 6009, AustraliaKosala Ranathunge - The University of Western AustraliaTreena I. Burgess - Murdoch University, Harry Butler InstituteFelix de Tombeur - Université de MontpellierDuccio Migliorini - Institute for Sustainable Plant ProtectionPaul Dallongeville - Univ Western Australia, Sch Biol Sci, 35 Stirling Highway, Perth, WA 6009, AustraliaGaetan Glauser - University of NeuchâtelHans Lambers - The University of Western Australia
- Publication Details
- The New phytologist, Early View
- Publisher
- Wiley
- Number of pages
- 15
- Grant note
- University Postgraduate Award DP200101013; FT170100195 / Australian Research Council University of Western Australia
- Identifiers
- 991005626669707891
- Copyright
- © 2023 The Authors.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.97 Plant Pathology
- 3.97.488 Mycorrhizal Symbiosis
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science