Kelps feature systemic defense responses insights into the evolution of innate immunity in multicellular eukaryotes

Kelps feature systemic defense responses : insights into the evolution of innate immunity in multicellular eukaryotes

© 2014 European Union. New Phytologist © 2014 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 204(2014), 3 vom: 05. Nov., Seite 567-576
1. Verfasser: Thomas, François (VerfasserIn)
Weitere Verfasser: Cosse, Audrey, Le Panse, Sophie, Kloareg, Bernard, Potin, Philippe, Leblanc, Catherine
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Laminaria digitata defense responses elicitation kelps oxidative burst systemic immune response Hydrogen Peroxide BBX060AN9V
Beschreibung
Zusammenfassung:© 2014 European Union. New Phytologist © 2014 New Phytologist Trust.
Brown algae are one of the few eukaryotic lineages that have evolved complex multicellularity, together with Opisthokonts (animals, fungi) and Plantae (land plants, green and red algae). In these three lineages, biotic stresses induce similar local defense reactions. Animals and land plants also feature a systemic immune response, protecting the whole organism after an attack on one of its parts. However, the occurrence of systemic defenses has never been investigated in brown algae. We elicited selected parts of the kelp Laminaria digitata and monitored distant, nonchallenged areas of the same individual for subsequent defense reactions. A systemic reaction was detected following elicitation on a distant area, including an oxidative response, an increase in haloperoxidase activities and a stronger resistance against herbivory. Based on experiments with pharmacological inhibitors, the liberation of free fatty acids is proposed to play a key role in systemic signaling, reminiscent of what is known in land plants. This study is the first report, outside the phyla of Opisthokonts and Plantae, of an intraorganism communication leading to defense reactions. These findings indicate that systemic immunity emerged independently at least three times, as a consequence of convergent evolution in multicellular eukaryotic lineages
Beschreibung:Date Completed 01.06.2015
Date Revised 09.01.2024
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.12925