Physiological performances of two populations of Compsopogon caeruleus (Rhodophyta) to inorganic nitrogen and phosphorus impoverishment

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dc.contributor.authorBautista, Anna Isabel Nassar
dc.contributor.authorNecchi Júnior, Orlando [UNESP]
dc.contributor.institutionInstituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-04-27T11:55:58Z
dc.date.available2015-04-27T11:55:58Z
dc.date.issued2014
dc.description.abstractStudies on the effects of inorganic nutrients manipulation (specially nitrogen and phosphorus) in freshwater macroalgae are scarce. Physiological responses (growth, photosynthesis, and pigment contents) to nitrogen and phosphorus impoverishment (nitrate and phosphates, respectively) were analyzed under culture conditions in two populations of Compsopogon caeruleus coming from environments with distinct levels of saprobity (oligosaprobic and mesosaprobic, designated isolates o and m, respectively). The aim was to evaluate the isolate responses (decrease or increase in physiological performance) to decrease in inorganic nitrogen and phosphorus concentrations. Three dilutions in original concentration of nitrogen and phosphorus of Bold Basic Medium were tested. For the nitrogen treatments, the isolate m had a more pronounced decrease in general performance in comparison to isolate o: lower values of effective quantum yield and phycobiliprotein concentrations in all nitrogen dilutions. Phycobiliprotein degradation is a typical and widely reported response of red algae under nitrogen scarcity. For the phosphorus experiments, the isolate o showed a more pronounced decrease in general performance in comparison to isolate m: lower values of maximum photosynthetic rate (Pmax) and photosynthetic efficiency (a), besides lower phycobiliprotein concentrations in all dilutions. The best performance of C. caeruleus was found at higher nutrient concentrations, confirming previous records as a good bioindicator of enriched environments. Nevertheless, the two populations differed in the mode that they use these resources, thus suggesting a possible phenotypic difference between them. Physiological responses of these isolates to nitrogen and phosphorus impoverishment seem to be more related to the type of limiting nutrient than to saprobity.en
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Biociências Letras e Ciências Exatas de São José do Rio Preto, São José do Rio Preto, Rua Cristóvão Colombo, 2265, Jardim Nazareth, CEP 15054000, SP, Brasil
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Zoologia e Botânica, Instituto de Biociências Letras e Ciências Exatas de São José do Rio Preto
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 05/03511-0
dc.format.extent391-398
dc.identifierhttp://link.springer.com/article/10.1007%2Fs40415-014-0088-8
dc.identifier.citationRevista Brasileira de Botânica, v. 37, n. 4, p. 391-398, 2014.
dc.identifier.doi10.1007/s40415-014-0088-8
dc.identifier.issn0100-8404
dc.identifier.lattes8973982859569408
dc.identifier.urihttp://hdl.handle.net/11449/122705
dc.language.isoeng
dc.relation.ispartofRevista Brasileira de Botânica
dc.relation.ispartofsjr0,269
dc.rights.accessRightsAcesso restrito
dc.sourceCurrículo Lattes
dc.subjectPhysiologypt
dc.subjectPhotosynthesispt
dc.subjectNutrientspt
dc.subjectPigmentspt
dc.subjectRhodophytapt
dc.subjectcrescimentoen
dc.subjectfotossínteseen
dc.subjectfósforoen
dc.subjectnitrogênioen
dc.subjectpigmentosen
dc.titlePhysiological performances of two populations of Compsopogon caeruleus (Rhodophyta) to inorganic nitrogen and phosphorus impoverishmenten
dc.typeArtigo
unesp.author.lattes8973982859569408
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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