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Blue- and green-light signals for gamete release in the brown alga, Silvetia compressa

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dc.contributor.authorPearson, G. A.
dc.contributor.authorSerrão, Ester
dc.contributor.authorDring, M.
dc.contributor.authorSchmid, R.
dc.date.accessioned2014-06-03T13:58:29Z
dc.date.available2014-06-03T13:58:29Z
dc.date.issued2004
dc.date.updated2014-05-21T14:02:13Z
dc.description.abstractThe intertidal brown alga Silvetia compressa releases gametes from receptacles (the reproductive tissue) rapidly upon a dark transfer (following a photosynthesisdependent period in the light, termed potentiation). In this study, the wavelength-dependence of this process was investigated. During the potentiation period in white light (WL), gametes are not released. However, gametes were released during potentiation in blue light (BL), or in low red light/blue light (RL/BL) ratios, but not in RL alone, high RL/BL ratios, or in broadband blue-green light (BGL) (presence of BL, but absence of RL). RL was as effective as WL for potentiation, i.e., both lead to gamete release following transfer to darkness. Rates of linear photosynthetic electron transport were similar in RL and BL. Gamete release in BL was inhibited by equal amounts of additional narrow-waveband light between the green and red regions of the spectrum, with light-induced gamete release restricted between <491 nm and 509 nm. Very little light-induced gamete release occurred between 530 nm and 650 nm. It is proposed that a BL-responsive photoreceptor is responsible for light-induced gamete release. Transfer of WL-potentiated receptacles to GL near 530 nm resulted in significant de-potentiation and reduced gamete release during a subsequent dark transfer. This effect was not seen at 509 nm or 560 nm and revealed the presence of a second photoreceptor system repressing or counteracting potentiation in the light. We propose that the restriction of gamete release to periods when irradiance is blue-shifted may constitute a depth-sensing mechanism for this intertidal alga, allowing controlled release of gametes at high tide and/or less turbid periods, thus minimizing gamete dilution, and promoting fertilization success.por
dc.identifier.citationPearson, G.A.; Serrão, E.A.; Dring, M.; Schmid, R. Blue- and green-light signals for gamete release in the brown alga, Silvetia compressa, Oecologia, 138, 2, 193-201, 2004.por
dc.identifier.doihttp://dx.doi.org/10.1007/s00442-003-1424-z
dc.identifier.issn0029-8549
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4170
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringerpor
dc.subjectExternal fertilizationpor
dc.subjectIntertidal seaweedpor
dc.subjectPhotoreceptorpor
dc.subjectReproductive biologypor
dc.subjectSpawningpor
dc.titleBlue- and green-light signals for gamete release in the brown alga, Silvetia compressapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage201por
oaire.citation.issue2por
oaire.citation.startPage193por
oaire.citation.titleOecologiapor
oaire.citation.volume138por
person.familyNamePearson
person.familyNameSerrao
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery0a10c448-c7f5-4c3b-9488-3917c707e35e

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