Ectomycorrhizal symbiosis prepares its host locally and systemically for abiotic cue signaling

0579454 - ÚEB 2024 RIV US eng J - Článek v odborném periodiku
Pereira, M.F. - Cohen, D. - Auer, L. - Aubry, N. - Bogeat-Triboulot, M. B. - Buré, C. - Engle, N. L. - Jolivet, Y. - Kohler, A. - Novák, Ondřej - Pavlović, Iva - Priault, P. - Tschaplinski, T. J. - Hummel, I. - Vaultier, M. N. - Veneault-Fourrey, C.
Ectomycorrhizal symbiosis prepares its host locally and systemically for abiotic cue signaling.
Plant Journal. Roč. 116, č. 6 (2023), s. 1784-1803. ISSN 0960-7412. E-ISSN 1365-313X
Grant CEP: GA MŠMT(CZ) EF16_019/0000827
Institucionální podpora: RVO:61389030
Klíčová slova: co-expression modules * hormonal profiling * Laccaria bicolor * metabolome * mycorrhizas * ozone * poplar * soil water deficit
Obor OECD: Biochemistry and molecular biology
Impakt faktor: 7.2, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1111/tpj.16465

Tree growth and survival are dependent on their ability to perceive signals, integrate them, and trigger timely and fitted molecular and growth responses. While ectomycorrhizal symbiosis is a predominant tree-microbe interaction in forest ecosystems, little is known about how and to what extent it helps trees cope with environmental changes. We hypothesized that the presence of Laccaria bicolor influences abiotic cue perception by Populus trichocarpa and the ensuing signaling cascade. We submitted ectomycorrhizal or non-ectomycorrhizal P. trichocarpa cuttings to short-term cessation of watering or ozone fumigation to focus on signaling networks before the onset of any physiological damage. Poplar gene expression, metabolite levels, and hormone levels were measured in several organs (roots, leaves, mycorrhizas) and integrated into networks. We discriminated the signal responses modified or maintained by ectomycorrhization. Ectomycorrhizas buffered hormonal changes in response to short-term environmental variations systemically prepared the root system for further fungal colonization and alleviated part of the root abscisic acid (ABA) signaling. The presence of ectomycorrhizas in the roots also modified the leaf multi-omics landscape and ozone responses, most likely through rewiring of the molecular drivers of photosynthesis and the calcium signaling pathway. In conclusion, P. trichocarpa-L. bicolor symbiosis results in a systemic remodeling of the host's signaling networks in response to abiotic changes. In addition, ectomycorrhizal, hormonal, metabolic, and transcriptomic blueprints are maintained in response to abiotic cues, suggesting that ectomycorrhizas are less responsive than non-mycorrhizal roots to abiotic challenges.
Trvalý link: https://hdl.handle.net/11104/0348257