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	Provedor de dados RChHN (2) Autor ALBERDI,MIREN (2) BRAVO,LEÓN A (2) CORCUERA,LUIS J (2) HESS,SUSAN (2) REYES-DÍAZ,MARJORIE (2) ZÚÑIGA,RAFAEL (2) OLIVARES,ERICK (1) Mais... Palavra-chave Chlorophyll fluorescence (2) Photosynthesis (2) Lutein (1) Nothofagus dombeyi (1) Nothofagus nitida (1) Photoprotective pigments (1) Xanthophyll cycle (1) Xanthophyíls cycle (1) Mais... Tipo do documento Journal article (2) Ano 2009 (1) 2006 (1) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Seasonal changes in the photosynthetic performance of two evergreen Nothofagus species in south central Chile RChHN ZÚÑIGA,RAFAEL; ALBERDI,MIREN; REYES-DÍAZ,MARJORIE; OLIVARES,ERICK; HESS,SUSAN; BRAVO,LEÓN A; CORCUERA,LUIS J. The evergreen Nothofagus dombeyi and Nothofagus nitida are important members of the temperate Chilean rainforest. They seldom grow together in nature. Nothofagus nitida is more susceptible to excess light and drought than N. dombeyi. We postulate that the different properties of the photosynthetic apparatus under common garden conditions of these species could explain their contrasting habitat preferences. The two species growing in a common garden in south central Chile were studied. The optimal photochemical efficiency (Fv/Fm) of both species remained within normal values (»0.8) with the exception of a decrease in N. dombeyi at midday in summer, suggesting reversible reduction in photochemical efficiency of photosystem II (PSII). During summer the... Tipo: Journal article Palavras-chave: Chlorophyll fluorescence; Photosynthesis; Nothofagus dombeyi; Nothofagus nitida; Xanthophyll cycle. Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000400008 Photochemical efficiency of PSII and photoprotective pigments in seedlings and adults of two Proteaceae with different shade tolerance from the Chilean temperate rain forest RChHN ALBERDI,MIREN; REYES-DÍAZ,MARJORIE; ZÚÑIGA,RAFAEL; HESS,SUSAN; BRAVO,LEÓN A; CORCUERA,LUIS J. The seasonal variation in energy quenching parameters of photosystem II and photoprotective pigments were studied in seedlings and adults of two Proteaceae: a shade-intolerant species (Embotrium coccineum J.R. et G. Forster) and a shade-tolerant species (Lomatia ferruginea (Cav.) R. Br.). We postúlate that the shade intolerant species favors photochemical energy driven processes (mainly C0(2) assimilation) while the shade tolerant species exhibits higher non-photochemical energy dissipation under unfavorable conditions. Moreover, the shade tolerant species presents lower seasonal variations in these parameters that the shade intolerant species. Differences in energy dissipation should be more evident in seedlings than adults because of their contrasting... Tipo: Journal article Palavras-chave: Chlorophyll fluorescence; Lutein; Photosynthesis; Photoprotective pigments; Xanthophyíls cycle. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2009000300006 Registros recuperados: 2 Primeira ... 1 ... Última

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