Contrasting response of <i>Gracilaria chilensis</i> (Gracilariales, Rhodophyta) life cycle stages to epiphyte infection

dc.contributor.authorUsandizaga, Sara
dc.contributor.authorBeltran, Jessica
dc.contributor.authorFaugeron, Sylvain
dc.contributor.authorCamus, Carolina
dc.date.accessioned2025-01-20T20:07:02Z
dc.date.available2025-01-20T20:07:02Z
dc.date.issued2023
dc.description.abstractThe red seaweed Gracilaria chilensis, a species extensively cultivated in Chile for agar extraction, was subjected to a bioassay to determine the susceptibility of tetrasporophytes, female and male gametophytes collected from natural and cultivated populations, to the red epiphyte Acrochaetium sp. and the brown epiphyte Ectocarpus sp. The settlement, attachment and germination of epiphytic algal spores on G. chilensis thalli were evaluated, and the photosynthetic responses and the concentration of total phenolic compounds were determined as a possible response of G. chilensis to biotic stress. The results showed that when the thalli were exposed to Acrochaetium infection, female individuals had a significantly lower percentage of germinated spores than other phases of the life cycle. After infection with Ectocarpus spores, males showed the highest % germination of the epiphyte. For both epiphytes, the response of tetrasporophytes from natural and cultivated populations shows a similar trend. The total content of phenolic compounds showed that, in general, the individuals infected with Acrochaetium had a higher defense capacity, whereas the infection with the brown alga did not induce a significant release of phenolic compounds. Despite the heterogeneous results observed for photosynthetic activity, a higher photoinhibition of the maximum fluorescence quantum yield (F-v/F-m) was observed in thalli with the Acrochaetium epiphyte, confirming that G. chilensis was subjected to stress after infection. Taken together, these observations may suggest that the cultivation of females could be of long-term benefit to farms by reducing biomass losses under stressful conditions and epiphyte invasions on farms.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10811-023-02998-x
dc.identifier.eissn1573-5176
dc.identifier.issn0921-8971
dc.identifier.urihttps://doi.org/10.1007/s10811-023-02998-x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91756
dc.identifier.wosidWOS:000995747800001
dc.issue.numero4
dc.language.isoen
dc.pagina.final1845
dc.pagina.inicio1831
dc.revistaJournal of applied phycology
dc.rightsacceso restringido
dc.subjectEpiphytes
dc.subjectGracilariales
dc.subjectRhodophyta
dc.subjectLife cycle
dc.subjectPhotosynthetic activity
dc.subjectPhenolic compounds
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleContrasting response of <i>Gracilaria chilensis</i> (Gracilariales, Rhodophyta) life cycle stages to epiphyte infection
dc.typeartículo
dc.volumen35
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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