Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)

Carrageenans biosynthesized by gametophytic and tetrasporic plants of seaweeds belonging to the Gigartinaceae and Phyllophoraceae are different: gametophytes produce carrageenans of the kappa family, whereas lambda-carrageenans are extracted from tetrasporophytes. For Gigartina skottsbergii Setchell...

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Autores principales: Estevez, Jose Manuel, Ciancia, Marina, Cerezo, Alberto Saúl
Publicado: 2002
Materias:
Carposporophyte
Carrageenan structure
Cystocarps
Gametophyte
Gigartina skottsbergii (Gigartinaceae)
Gymnogongrus torulosus (Phyllophoraceae)
Kappa/iota-carrageenan
Lambda-carrageenan
carrageenan
gametophyte
red alga
algae
Eukaryota
Gigartina
Gigartina skottsbergii
Gigartinaceae
Gymnogongrus
Gymnogongrus torulosus
Halophila
Phyllophoraceae
Rhodophyta
Spermatophyta
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v38_n2_p344_Estevez
http://hdl.handle.net/20.500.12110/paper_00223646_v38_n2_p344_Estevez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00223646_v38_n2_p344_Estevez
record_format dspace
spelling paper:paper_00223646_v38_n2_p344_Estevez2023-06-08T14:50:05Z Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae) Estevez, Jose Manuel Ciancia, Marina Cerezo, Alberto Saúl Carposporophyte Carrageenan structure Cystocarps Gametophyte Gigartina skottsbergii (Gigartinaceae) Gymnogongrus torulosus (Phyllophoraceae) Kappa/iota-carrageenan Lambda-carrageenan carrageenan gametophyte red alga algae Eukaryota Gigartina Gigartina skottsbergii Gigartinaceae Gymnogongrus Gymnogongrus torulosus Halophila Phyllophoraceae Rhodophyta Spermatophyta Carrageenans biosynthesized by gametophytic and tetrasporic plants of seaweeds belonging to the Gigartinaceae and Phyllophoraceae are different: gametophytes produce carrageenans of the kappa family, whereas lambda-carrageenans are extracted from tetrasporophytes. For Gigartina skottsbergii Setchell and Gardner and Gymnogongrus torulosus Hooker et Harvey, mature cystocarps were isolated and carrageenans were extracted. Structural determination by methylation analysis, Fourier transform infrared spectroscopy, and 13C-NMR spectroscopy showed that they were kappa/iota-carrageenans. For the extract obtained from cystocarps of Gigartina skottsbergii with water at room temperature, the ratio kappa:iota was 1:0.30 and at 90°C was 1:0.43; significant amounts of precursors were also present. The extract obtained from cystocarps of Gymnogongrus torulosus at 90°C showed prevalence of iota-carrageenans (ratio kappa:iota 1:1.21). These extracts are similar to the polysaccharides produced by gametophytes of these seaweeds. For Gigartina skottsbergii, it was possible to separate the pericarpic tissue from the carposporophyte. Thus, they were extracted separately, and the carrageenans isolated were studied as described before, obtaining similar conclusions. These results clearly show that whereas the carposporophytes are located inside the cystocarp, they produce carrageenans of the kappa family despite of being diploid cells. Fil:Estevez, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ciancia, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cerezo, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v38_n2_p344_Estevez http://hdl.handle.net/20.500.12110/paper_00223646_v38_n2_p344_Estevez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Carposporophyte
Carrageenan structure
Cystocarps
Gametophyte
Gigartina skottsbergii (Gigartinaceae)
Gymnogongrus torulosus (Phyllophoraceae)
Kappa/iota-carrageenan
Lambda-carrageenan
carrageenan
gametophyte
red alga
algae
Eukaryota
Gigartina
Gigartina skottsbergii
Gigartinaceae
Gymnogongrus
Gymnogongrus torulosus
Halophila
Phyllophoraceae
Rhodophyta
Spermatophyta
spellingShingle Carposporophyte
Carrageenan structure
Cystocarps
Gametophyte
Gigartina skottsbergii (Gigartinaceae)
Gymnogongrus torulosus (Phyllophoraceae)
Kappa/iota-carrageenan
Lambda-carrageenan
carrageenan
gametophyte
red alga
algae
Eukaryota
Gigartina
Gigartina skottsbergii
Gigartinaceae
Gymnogongrus
Gymnogongrus torulosus
Halophila
Phyllophoraceae
Rhodophyta
Spermatophyta
Estevez, Jose Manuel
Ciancia, Marina
Cerezo, Alberto Saúl
Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
topic_facet Carposporophyte
Carrageenan structure
Cystocarps
Gametophyte
Gigartina skottsbergii (Gigartinaceae)
Gymnogongrus torulosus (Phyllophoraceae)
Kappa/iota-carrageenan
Lambda-carrageenan
carrageenan
gametophyte
red alga
algae
Eukaryota
Gigartina
Gigartina skottsbergii
Gigartinaceae
Gymnogongrus
Gymnogongrus torulosus
Halophila
Phyllophoraceae
Rhodophyta
Spermatophyta
description Carrageenans biosynthesized by gametophytic and tetrasporic plants of seaweeds belonging to the Gigartinaceae and Phyllophoraceae are different: gametophytes produce carrageenans of the kappa family, whereas lambda-carrageenans are extracted from tetrasporophytes. For Gigartina skottsbergii Setchell and Gardner and Gymnogongrus torulosus Hooker et Harvey, mature cystocarps were isolated and carrageenans were extracted. Structural determination by methylation analysis, Fourier transform infrared spectroscopy, and 13C-NMR spectroscopy showed that they were kappa/iota-carrageenans. For the extract obtained from cystocarps of Gigartina skottsbergii with water at room temperature, the ratio kappa:iota was 1:0.30 and at 90°C was 1:0.43; significant amounts of precursors were also present. The extract obtained from cystocarps of Gymnogongrus torulosus at 90°C showed prevalence of iota-carrageenans (ratio kappa:iota 1:1.21). These extracts are similar to the polysaccharides produced by gametophytes of these seaweeds. For Gigartina skottsbergii, it was possible to separate the pericarpic tissue from the carposporophyte. Thus, they were extracted separately, and the carrageenans isolated were studied as described before, obtaining similar conclusions. These results clearly show that whereas the carposporophytes are located inside the cystocarp, they produce carrageenans of the kappa family despite of being diploid cells.
author Estevez, Jose Manuel
Ciancia, Marina
Cerezo, Alberto Saúl
author_facet Estevez, Jose Manuel
Ciancia, Marina
Cerezo, Alberto Saúl
author_sort Estevez, Jose Manuel
title Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
title_short Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
title_full Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
title_fullStr Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
title_full_unstemmed Carrageenans biosynthesized by carposporophytes of red seaweeds Gigartina skottsbergii (Gigartinaceae) and Gymnogongrus torulosus (Phyllophoraceae)
title_sort carrageenans biosynthesized by carposporophytes of red seaweeds gigartina skottsbergii (gigartinaceae) and gymnogongrus torulosus (phyllophoraceae)
publishDate 2002
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223646_v38_n2_p344_Estevez
http://hdl.handle.net/20.500.12110/paper_00223646_v38_n2_p344_Estevez
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AT cianciamarina carrageenansbiosynthesizedbycarposporophytesofredseaweedsgigartinaskottsbergiigigartinaceaeandgymnogongrustorulosusphyllophoraceae
AT cerezoalbertosaul carrageenansbiosynthesizedbycarposporophytesofredseaweedsgigartinaskottsbergiigigartinaceaeandgymnogongrustorulosusphyllophoraceae
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