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Plant J

Title:		Aldehyde perception induces specific molecular responses in Laminaria digitata and affects algal consumption by a specialist grazer
Author(s):		Xing Q; Cabioch L; Desrut A; Le Corguille G; Rousvoal S; Dartevelle L; Rolland E; Guitton Y; Potin P; Markov GV; Faugeron S; Leblanc C;
Address:		"Sorbonne Universite, CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, Roscoff, France. Centro de Conservacion Marina and CeBiB, Facultad de Ciencias Biologicas, Pontificia Universidad Catolica de Chile, Santiago, Chile. Sorbonne Universite, CNRS, FR 2424, ABIMS Platform, Station Biologique de Roscoff, Roscoff, France. Oniris, INRAE, LABERCA, Nantes, France"
Journal Title:		Plant J
Year:		2023
Volume:		20230902
Issue:
Page Number:		-
DOI:		10.1111/tpj.16450
ISSN/ISBN:		1365-313X (Electronic) 0960-7412 (Linking)
Abstract:		"In the marine environment, distance signaling based on water-borne cues occurs during interactions between macroalgae and herbivores. In the brown alga Laminaria digitata from North-Atlantic Brittany, oligoalginates elicitation or grazing was shown to induce chemical and transcriptomic regulations, as well as emission of a wide range of volatile aldehydes, but their biological roles as potential defense or warning signals in response to herbivores remain unknown. In this context, bioassays using the limpet Patella pellucida and L. digitata were carried out for determining the effects of algal transient incubation with 4-hydroxyhexenal (4-HHE), 4-hydroxynonenal (4-HNE) and dodecadienal on algal consumption by grazers. Simultaneously, we have developed metabolomic and transcriptomic approaches to study algal molecular responses after treatments of L. digitata with these chemical compounds. The results indicated that, unlike the treatment of the plantlets with 4-HNE or dodecadienal, treatment with 4-HHE decreases algal consumption by herbivores at 100 ng.ml(-1) . Moreover, we showed that algal metabolome was significantly modified according to the type of aldehydes, and more specifically the metabolite pathways linked to fatty acid degradation. RNAseq analysis further showed that 4-HHE at 100 ng.ml(-1) can activate the regulation of genes related to oxylipin signaling pathways and specific responses, compared to oligoalginates elicitation. As kelp beds constitute complex ecosystems consisting of habitat and food source for marine herbivores, the algal perception of specific aldehydes leading to targeted molecular regulations could have an important biological role on kelps/grazers interactions"
Keywords:		Brown algae biotic interactions defense and signaling responses metabolomics transcriptomics;
Notes:		"PublisherXing, Qikun Cabioch, Lea Desrut, Antoine Le Corguille, Gildas Rousvoal, Sylvie Dartevelle, Laurence Rolland, Elodie Guitton, Yann Potin, Philippe Markov, Gabriel V Faugeron, Sylvain Leblanc, Catherine eng PIA IDEALG ANR-10-BTBR-04/Agence Nationale de la Recherche/ QX's Ph.D. work/Blue Granary company/ Centre National de la Recherche Scientifique/ ANR-10- INSB-02/EMBRC-France/ ANR-11-INBS-0010/French National Infrastructure for Metabolomics and Fluxomics MetaboHUB/ ANR-11-INBS-0013/Institut Francais de Bioinformatique/ J13U220/ARED/Region Bretagne/ Sorbonne Universite/ England 2023/09/04 Plant J. 2023 Sep 2. doi: 10.1111/tpj.16450"