Data/hora: 07/06/2024 15:51:23

Provedor de dados: | Biocell
País: | Argentina
Título: | A study of chlorophyll-like and phycobilin pigments in the C endosymbiont of the apple- snail Pomacea canaliculata
Autores: | Vega,Israel A.; Dellagnola,Federico A.; Hurst,Jorge A.; Godoy,Martín S.; Castro-Vazquez,Alfredo.
Data: | 2012-08-01
Ano: | 2012
Palavras-chave: | Symbiosis; Cyanobacteria; Chloroplast; Photosynthetic pigments; Phylogeny.
Resumo: | Pigments present in the brown-greenish C morph of an intracellular endosymbiont of Pomacea canaliculata were investigated. Acetone extracts of the endosymbiotic corpuscles showed an absorption spectrum similar to that of chlorophylls. Three fractions obtained from silica gel column chromatography of the acetone extracts (C I, C II and C III), were studied by positive ion fast atom bombardment-mass spectrometry (FAB-MS) and hydrogen-nuclear magnetic resonance (H-NMR). Results indicated the presence of (1) a sterol in the yellow colored C I fraction; (2) a mixture of pheophorbides a and b in the major green fraction, C II; and (3) a modified pheophorbide a in the smaller green fraction, C III. Aqueous extracts of the C endosymbiont did not show evidence of the occurrence of C-phycocyanin, allophycocyanin or phycoerithrin (light absorption, fluorescence emission, and electrophoresis of the protein moieties) while cyanobacterial cells (Nostoc sp.) showed evidence of C-phycocyanin and allophycocyanin. The possible phylogenetic and functional significance of the pigments present in the C endosymbiont is discussed.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452012000200001
Editor: | Sociedad Latinoamericana de Microscopía Electrónica.; Centro Regional de Investigaciones Científicas y Tecnológicas (Mendoza, Argentina)
Formato: | text/html
Fonte: | Biocell  v.36 n.2 2012
Fonte: | info:eu-repo/semantics/openAccess