CELL-WALL ULTRASTRUCTURE AND CATION LOCALIZATION IN SOME BENTHIC MARINE-ALGAE

Mariani, Paolina; Tolomio, Claudio; Baldan, Barbara; Braghetta, Paola

doi:10.2216/i0031-8884-29-2-253.1

Cell wall ultrastructure was compared in mature thalli of Cystoseira barbata (Goodenough et Woodward) J. Agardh (Phaeophyta), Gracilaria verrucosa (Hudson) Papenfuss (Rhodophyta) and Enteromorpha intestinalis (Linnaeus) Link (Chlorophyta), providing a structural basis for the study of cation localization (through the K antimonate precipitation technique). These species showed different amounts of antimonate precipitates and different patterns of cation localization in the apoplast. SEM X-ray microanalyses allowed the localization of sulphated polysaccharides through the Speak and identification of the cations present in the cell walls. The results suggest that in different species the cation-binding properties of the cell wall polysaccharides may have varying importance in cellular ionic regulation.

Titolo:	CELL-WALL ULTRASTRUCTURE AND CATION LOCALIZATION IN SOME BENTHIC MARINE-ALGAE
Autori:	MARIANI, PAOLINA TOLOMIO, CLAUDIO BALDAN, BARBARA BRAGHETTA, PAOLA
Data di pubblicazione:	1990
Rivista:	PHYCOLOGIA
Abstract:	Cell wall ultrastructure was compared in mature thalli of Cystoseira barbata (Goodenough et Woodward) J. Agardh (Phaeophyta), Gracilaria verrucosa (Hudson) Papenfuss (Rhodophyta) and Enteromorpha intestinalis (Linnaeus) Link (Chlorophyta), providing a structural basis for the study of cation localization (through the K antimonate precipitation technique). These species showed different amounts of antimonate precipitates and different patterns of cation localization in the apoplast. SEM X-ray microanalyses allowed the localization of sulphated polysaccharides through the Speak and identification of the cations present in the cell walls. The results suggest that in different species the cation-binding properties of the cell wall polysaccharides may have varying importance in cellular ionic regulation.
Handle:	http://hdl.handle.net/11577/154383
Appare nelle tipologie:	01.01 - Articolo in rivista

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