Data/hora: 16/06/2024 06:26:46

Provedor de dados: | 88
País: | Brazil
Título: | Photosynthetic properties of three Brazilian seaweeds
Autores: | Chaloub,Ricardo M.; Reinert,Fernanda; Nassar,Cristina A. G.; Fleury,Beatriz G.; Mantuano,Dulce G.; Larkum,Anthony W. D.
Data: | 2010-06-01
Ano: | 2010
Palavras-chave: | Chlorophyll fluorescence; Lobophora variegata; Plocamium brasiliensis; Ulva fasciata.
Resumo: | Photosynthetic performance of distinct marine macroalgae, Ulva fasciata Delile (green alga), Lobophora variegata (J. V. Lamouroux) Womersley ex E. C. Oliveira (brown alga), and Plocamium brasiliensis (Greville) M. A. Howe &amp;amp; W. R. Taylor (red alga), were compared using a pulse amplitude-modulated fluorometer. The maximum quantum yield (Fv/Fm) ranged from 0.80 to 0.51, and the lowest value was found in P. brasiliensis. Under 400 µmol photons m-2 s-1 irradiance, the highest value of photochemical quenching (qP = 0.92 ± 0.13) was observed for U. fasciata. The red alga P. brasiliensis dissipated high amounts of excitation energy (qN = 0.56 ± 0.09), resulting in relatively low values for the effective quantum yield of PS-II (0.23 ± 0.04), as well as for the relative electron transport rate (3.3 ± 0.7). The high photosynthetic potential found for U. fasciata partially explains the species ability for rapid growth and high productivity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042010000200017
Editor: | Sociedade Botânica de São Paulo
Relação: | 10.1590/S0100-84042010000200017
Formato: | text/html
Fonte: | Brazilian Journal of Botany  v.33 n.2 2010
Fonte: | info:eu-repo/semantics/openAccess