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Responses of zostera marina and cymodocea nodosa to light-limitation stress

2013-11-28Journal article Open access
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dc.contributor.authorSilva, João
dc.contributor.authorBarrote, Isabel
dc.contributor.authorCosta, Monya
dc.contributor.authorAlbano, Sílvia
dc.contributor.authorSantos, Rui
dc.date.accessioned2014-01-07T11:13:57Z
dc.date.available2014-01-07T11:13:57Z
dc.date.issued2013-11-28
dc.description.abstractThe effects of light-limitation stress were investigated in natural stands of the seagrasses Zostera marina and Cymodocea nodosa in Ria Formosa coastal lagoon, southern Portugal. Three levels of light attenuation were imposed for 3 weeks in two adjacent meadows (2–3 m depth), each dominated by one species. The response of photosynthesis to light was determined with oxygen electrodes. Chlorophylls and carotenoids were determined by high-pressure liquid chromatography (HPLC). Soluble protein, carbohydrates, malondialdehyde and phenol contents were also analysed. Both species showed evident signs of photoacclimation. Their maximum photosynthetic rates were significantly reduced with shading. Ratios between specific light harvesting carotenoids and the epoxidation state of xanthophyll cycle carotenoids revealed significantly higher light harvesting efficiency of C. nodosa, a competitive advantage in a low light environment. The contents of both soluble sugars and starch were considerably lower in Z. marina plants, particularly in the rhizomes, decreasing even further with shading. The different carbohydrate energy storage strategies found between the two species clearly favour C. nodosa's resilience to light deprivation, a condition enhanced by its intrinsic arrangement of the pigment pool. On the other hand, Z. marina revealed a lower tolerance to light reduction, mostly due to a less plastic arrangement of the pigment pool and lower carbohydrate storage. Our findings indicate that Z. marina is close to a light-mediated ecophysiological threshold in Ria Formosa.por
dc.identifier.citationSilva J, Barrote I, Costa MM, Albano S, Santos R (2013) Physiological Responses of Zostera marina and Cymodocea nodosa to Light-Limitation Stress. PLoS ONE 8(11): e81058. doi:10.1371/journal.pone.0081058por
dc.identifier.doihttp://dx.doi.org/ 10.1371/journal.pone.0081058
dc.identifier.otherAUT: IBA00639; ROS00812;
dc.identifier.urihttp://hdl.handle.net/10400.1/3287
dc.language.isoengpor
dc.peerreviewedyespor
dc.relation.publisherversionhttp://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0081058por
dc.subjectZostera marinapor
dc.subjectCymodocea nodosapor
dc.subjectlight limitationpor
dc.subjectlow lightpor
dc.subjectseagrasspor
dc.subjectphotosynthetic pigmentspor
dc.titleResponses of zostera marina and cymodocea nodosa to light-limitation stresspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPagee81058por
oaire.citation.issue11por
oaire.citation.startPagee81058por
oaire.citation.titlePLoS ONEpor
oaire.citation.volume8por
person.familyNameSilva
person.familyNameBarrote
person.familyNameSantos
person.givenNameJoão
person.givenNameIsabel
person.givenNameRui
person.identifier82814
person.identifier42560
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.ciencia-id801C-0AE4-B5CA
person.identifier.ciencia-id9B18-444D-2244
person.identifier.orcid0000-0002-7211-1661
person.identifier.orcid0000-0002-0922-0259
person.identifier.orcid0000-0002-7861-4366
person.identifier.ridJ-7874-2013
person.identifier.ridB-4168-2008
person.identifier.scopus-author-id7403023547
person.identifier.scopus-author-id8659654200
person.identifier.scopus-author-id7201375018
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication61040b53-b17a-40f6-b42e-f5476a7a6ddb
relation.isAuthorOfPublication8027b4d2-ee8d-4432-be75-7a2342a905a8
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication.latestForDiscovery61040b53-b17a-40f6-b42e-f5476a7a6ddb

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