Growth responses and photosynthetic characteristics of wild and phycoerythrin-deficient strains of Hypnea musciformis (Rhodophyta)

Página do item simplificado
dc.contributor.authorYokoya, Nair S.
dc.contributor.authorNecchi, Orlando
dc.contributor.authorMartins, Aline P.
dc.contributor.authorGonzalez, Suzana F.
dc.contributor.authorPlastino, Estela M.
dc.contributor.institutionInst Bot
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:20:29Z
dc.date.available2014-05-20T15:20:29Z
dc.date.issued2007-06-01
dc.description.abstractThe phycoerythrin-deficient strain (green phenotype) of Hypnea musciformis (Rhodophyta) originated from a green branch, which had arisen as a spontaneous mutation in a wild plant (brown phenotype) collected from the Brazilian coast. The present study describes the growth responses to irradiance, photoperiod and temperature variations, pigment contents, and photosynthetic characteristics of the brown and green strains of H. musciformis. The results showed that growth rates increased as a function of irradiance (up to 40 mu mol photons m(-2) s(-1)) but, with further increase in irradiance (from 40 to 120 mu mol photons m(-2) s(-1)), became light-saturated and remained almost unchanged. The highest growth rates of the brown and green strains were observed in temperatures of 20-25 degrees C under long (14:10 h LD) and short (10:14 h LD) photoperiods. The brown strain had higher growth rates than the green strain in the short photoperiod, which could be related to the high concentrations of phycobiliproteins. Phycoerythrin was not detected in the green strain. The brown strain had higher concentrations of allophycocyanin and phycoerythrin in the short photoperiod while the green strain had higher concentrations of phycocyanin. The brown strain presented higher photosynthetic efficiency (alpha), and lower saturation parameter (I-k) and compensation irradiance (I-c) than the green strain. The brown strain exhibited the characteristics of shade-adapted plants, and its higher value of photosynthetic efficiency could be attributed to the higher phycoerythrin concentrations. Results of the present study indicate that both colour strains of H. musciformis could be selected for aquaculture, since growth rates were similar (although in different optimal light conditions), as the green strain seems to be adapted to higher light levels than the brown strain. Furthermore, these colour strains could be a useful experimental system to understand the regulation of biochemical processes of photosynthesis and metabolism of light-harvesting pigments in red algae.en
dc.description.affiliationInst Bot, Secao Ficol, BR-01061970 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Bot & Zool, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Biociencias, BR-05421970 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Bot & Zool, BR-15054000 Sao Jose do Rio Preto, SP, Brazil
dc.format.extent197-205
dc.identifierhttp://dx.doi.org/10.1007/s10811-006-9124-9
dc.identifier.citationJournal of Applied Phycology. Dordrecht: Springer, v. 19, n. 3, p. 197-205, 2007.
dc.identifier.doi10.1007/s10811-006-9124-9
dc.identifier.issn0921-8971
dc.identifier.urihttp://hdl.handle.net/11449/31768
dc.identifier.wosWOS:000246407100001
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Applied Phycology
dc.relation.ispartofjcr2.401
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectchlorophyll fluorescencept
dc.subjectcolour strainspt
dc.subjectgrowthpt
dc.subjectHypnea musciformispt
dc.subjectirradiancept
dc.subjectphotoperiodpt
dc.subjectphotosynthesispt
dc.subjecttemperaturept
dc.titleGrowth responses and photosynthetic characteristics of wild and phycoerythrin-deficient strains of Hypnea musciformis (Rhodophyta)en
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

Arquivos

Licença do Pacote
Agora exibindo 1 - 1 de 1
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:

Coleções

Artigos - Zoologia e Botânica - IBILCE