Differential ecological responses to environmental stress in the life history phases of the isomorphic red alga <i>Gracilaria chilensis</i> (Rhodophyta)

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dc.contributor.authorGuillemin, Marie-Laure
dc.contributor.authorSepulveda, Roger D.
dc.contributor.authorCorrea, Juan A.
dc.contributor.authorDestombe, Christophe
dc.date.accessioned2025-01-24T00:05:22Z
dc.date.available2025-01-24T00:05:22Z
dc.date.issued2013
dc.description.abstractIn order to better understand the alternation of generations that characterizes haploid-diploid life cycles, we assessed the existence of ecological differences between the two phases (haploid gametophyte and diploid tetrasporophyte) in Gracilaria chilensis, a rhodophyte with a typical Polysiphonia-type life cycle. We investigated the effect of light intensity and salinity on viability and growth of both phases at different ontogenetic stages: juveniles and adults. In our study, the survival of juvenile gametophytes (n) was higher than the survival of juvenile tetrasporophytes (2n) despite culture conditions; however, low salinity had greater effect on carpospores (2n) than on tetraspores (n). On the other hand, a complex interaction between salinity and light intensity within each life history phase generated observed differences between juvenile growth rates. Low light was shown to trigger early onset of alteration of the holdfast growing pattern. In addition, adult tetrasporophytes showed, despite the conditions, a faster vegetative growth than female and male gametophytes. These differences between phases could have led to the complete dominance of tetrasporophyte fragments of fronds observed in G. chilensis farms. We hypothesize that Chilean fishers could have unknowingly selected for tetrasporophyte thalli during domestication of the species, thus enhancing the natural trend of tetrasporophytes dominance already present in estuarine natural populations of free-floating plants.
dc.description.funderFondo Nacional de Desarrollo Cientifico y Tecnologico, Gobierno de Chile (FONDECYT)
dc.fechaingreso.objetodigital2025-03-16
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10811-012-9855-8
dc.identifier.eissn1573-5176
dc.identifier.issn0921-8971
dc.identifier.urihttps://doi.org/10.1007/s10811-012-9855-8
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101840
dc.identifier.wosidWOS:000313655400023
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final224
dc.pagina.inicio215
dc.revistaJournal of applied phycology
dc.rightsacceso restringido
dc.subjectLife cycle evolution
dc.subjectGametophyte
dc.subjectSporophyte
dc.subjectEcological differences
dc.subjectAsexual reproduction
dc.subjectLight
dc.subjectSalinity
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.titleDifferential ecological responses to environmental stress in the life history phases of the isomorphic red alga <i>Gracilaria chilensis</i> (Rhodophyta)
dc.typeartículo
dc.volumen25
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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