Spore release in <i>Acrochaetium</i> sp (Rhodophyta) is bacterially controlled

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dc.contributor.authorWeinberger, Florian
dc.contributor.authorBeltran, Jessica
dc.contributor.authorCorrea, Juan A.
dc.contributor.authorLion, Ulrich
dc.contributor.authorPohnert, Georg
dc.contributor.authorKumar, Naresh
dc.contributor.authorSteinberg, Peter
dc.contributor.authorKloareg, Bernard
dc.contributor.authorPotin, Philippe
dc.date.accessioned2025-01-21T01:05:34Z
dc.date.available2025-01-21T01:05:34Z
dc.date.issued2007
dc.description.abstractThe facultative red algal epiphyte Acrochaetium sp. liberated spores preferentially and recruited more successfully in laboratory cultures when its host Gracilaria chilensis C. J. Bird, McLachlan et E. C. Oliveira was present. The same effect was also induced by cell-free medium from G. chilensis, suggesting it contained a molecular signal. Antibiotics prevented spore release in Acrochaetium sp., even when G. chilensis was present, suggesting a prokaryotic origin of the signal. Simultaneous application of N-butyl-homoserine-lactone (BHL) restored the spore-release capacity, which demonstrated that spore release was not directly inhibited by the antibiotics and indicated that bacterially generated N-acyl-homoserine-lactones (AHLs) regulate spore release. An involvement of AHL was further indicated by the fact that two different halofuranone inhibitors of AHL receptors also inhibited spore release when they were applied at relatively low concentrations. Of seven different AHLs tested, only BHL induced the effect. However, BHL was only active at relatively high concentrations (100 mu M), and it was not detected in spore-release-inducing medium of G. chilensis. Another water-soluble AHL or an AHL structure analog is therefore probably the active compound in G. chilensis cultures. The data presented demonstrate that life cycle completion in Acrochaetium sp. strongly depends on bacteria, which are not always present in sufficient numbers on the alga itself. Exogenous bacteria that are associated with G. chilensis or with other potential substrates may therefore trigger timely spore liberation in Acrochaetium sp., provided that the necessary concentration of AHL is reached. This first finding of AHL perception in a red alga confirms that AHL signalling is more widespread among eukaryotes than was thought until recently. However, spore release of a second red alga, Sahlingia subintegra (Rosenv.) Kornmann, was unaffected by AHL, and the reaction observed is therefore not universal.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1529-8817.2007.00329.x
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/j.1529-8817.2007.00329.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95960
dc.identifier.wosidWOS:000245231700005
dc.issue.numero2
dc.language.isoen
dc.pagina.final241
dc.pagina.inicio235
dc.revistaJournal of phycology
dc.rightsacceso restringido
dc.subjectAcrochaetium
dc.subjectepiphytism
dc.subjectGracilaria
dc.subjecthalofuranone
dc.subjectN-acyl-homoserine-lactone
dc.subjectSahlingia
dc.subjectsporulation
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.titleSpore release in <i>Acrochaetium</i> sp (Rhodophyta) is bacterially controlled
dc.typeartículo
dc.volumen43
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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