Publication
A model for signal transduction during gamete release in the fucoid alga Pelvetia compressa
| dc.contributor.author | Pearson, Gareth | |
| dc.contributor.author | Brawley, S. H. | |
| dc.date.accessioned | 2018-12-07T14:58:15Z | |
| dc.date.available | 2018-12-07T14:58:15Z | |
| dc.date.issued | 1998-09 | |
| dc.description.abstract | Fucoid algae release gametes into-seawater following an inductive light period (potentiation), and gamete expulsion from potentiated receptacles of Pelvetia compressa began about 2 min after a light-to-dark transition. Agitation of the medium reversed potentiation, with an exponential time course completed in about 3 h. Light regulated two signaling pathways during potentiation and gamete expulsion: a photosynthetic pathway and a photosynthesis-independent pathway in which red light was active but blue light was not. Uptake of K+ appears to have an important role in potentiation, because a 50% inhibition of potentiation occurred in the presence of the tetraethylammonium ion, a K+-channel blocker. A central role of anion channels in the maintenance of potentiation is suggested by the premature release of gametes in the light when receptacles were incubated with inhibitors of slow-type anion channels. An inhibitor of tyrosine kinases, tyrphostin A63, also inhibited potentiation. A model for gamete release from P. compressa is presented that proposes that illumination results in the accumulation of ions (e.g. K+) throughout the cells of the receptacle during potentiation, which then move into the extracellular matrix during gamete expulsion to generate osmomechanical force, resulting in gamete release. | |
| dc.identifier.doi | 10.1104/pp.118.1.305 | |
| dc.identifier.issn | 0032-0889 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/11932 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | American Society of Plant Biologists | |
| dc.subject | Slow anion channels | |
| dc.subject | Successful external fertilization | |
| dc.subject | Guard cells | |
| dc.subject | K+ channels | |
| dc.subject | Leaflet movements | |
| dc.subject | Phytochrome | |
| dc.subject | Phosphorylation | |
| dc.subject | Plants | |
| dc.subject | Sensor | |
| dc.subject | Kinase | |
| dc.title | A model for signal transduction during gamete release in the fucoid alga Pelvetia compressa | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 313 | |
| oaire.citation.issue | 1 | |
| oaire.citation.startPage | 305 | |
| oaire.citation.title | Plant Physiology | |
| oaire.citation.volume | 118 | |
| person.familyName | Pearson | |
| person.givenName | Gareth Anthony | |
| person.identifier | 113536 | |
| person.identifier.ciencia-id | 3315-9919-1A52 | |
| person.identifier.orcid | 0000-0002-0768-464X | |
| person.identifier.rid | J-3911-2013 | |
| person.identifier.scopus-author-id | 55916875600 | |
| rcaap.rights | openAccess | |
| rcaap.type | article | |
| relation.isAuthorOfPublication | 0a10c448-c7f5-4c3b-9488-3917c707e35e | |
| relation.isAuthorOfPublication.latestForDiscovery | 0a10c448-c7f5-4c3b-9488-3917c707e35e |
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