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- W2105887789 abstract "Summary Brown algae are one of the few eukaryotic lineages that have evolved complex multicellularity, together with O pisthokonts (animals, fungi) and P lantae (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 L aminaria 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 O pisthokonts and P lantae, 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." @default.
- W2105887789 created "2016-06-24" @default.
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- W2105887789 date "2014-07-14" @default.
- W2105887789 modified "2023-09-30" @default.
- W2105887789 title "Kelps feature systemic defense responses: insights into the evolution of innate immunity in multicellular eukaryotes" @default.
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- W2105887789 doi "https://doi.org/10.1111/nph.12925" @default.
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