Structural analysis of carrageenan from farmed varieties of Philippine seaweed

Kappaphycus alvarezii, Eucheuma denticulatum and, more recently, Kappaphycus sp. ‘Sacol’ variety, are the carrageenan-containing red seaweeds currently farmed in the Philippines. The Kappaphycus sp. ‘Sacol’ variety is of particular interest to the Philippine seaweed industry because of its improved...

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Main Authors: Aguilan, Jennifer T, Broom, J E, Hammingson, J A, Dayrit, Fabian M, Montaño, M N E, Dancel, M C, Niñonuevo, M R, Furneaux, R H
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Published: Archīum Ateneo 2005
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Online Access:https://archium.ateneo.edu/chemistry-faculty-pubs/106
https://www.degruyter.com/view/journals/botm/46/2/article-p179.xml
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spelling ph-ateneo-arc.chemistry-faculty-pubs-11052020-07-27T06:05:23Z Structural analysis of carrageenan from farmed varieties of Philippine seaweed Aguilan, Jennifer T Broom, J E Hammingson, J A Dayrit, Fabian M Montaño, M N E Dancel, M C Niñonuevo, M R Furneaux, R H Kappaphycus alvarezii, Eucheuma denticulatum and, more recently, Kappaphycus sp. ‘Sacol’ variety, are the carrageenan-containing red seaweeds currently farmed in the Philippines. The Kappaphycus sp. ‘Sacol’ variety is of particular interest to the Philippine seaweed industry because of its improved resistance to ‘ice-ice’ disease and its fast growing characteristics. Here we report on the detailed chemical analysis of the carrageenan from this species. The native and alkali-modified carrageenans from Kappaphycus sp. ‘Sacol’ variety were characterized by FT-IR, 1H and 13C NMR spectroscopy, and constituent sugar and methylation analyses and were compared to those from K. alvarezii, K. cottonii and Eucheuma denticulatum. The three Kappaphycus species contained predominantly κ-carrageenan with low levels of ι-carrageenan, methylated carrageenan and μ-precursor residues, while Eucheuma denticulatum contained predominantly ι-carrageenan with significant amounts of ν-precursor residues. Taxonomic classification of Kappaphycus species based on morphology has proved to be difficult because of their known plasticity. Molecular analysis using the rbcLsequence revealed that the Kappaphycus sp. ‘Sacol’ variety is most likely a form of K. cottonii. 2005-01-01T08:00:00Z text https://archium.ateneo.edu/chemistry-faculty-pubs/106 https://www.degruyter.com/view/journals/botm/46/2/article-p179.xml Chemistry Faculty Publications Archīum Ateneo Biochemistry Chemistry
institution Ateneo De Manila University
building Ateneo De Manila University Library
country Philippines
collection archium.Ateneo Institutional Repository
topic Biochemistry
Chemistry
spellingShingle Biochemistry
Chemistry
Aguilan, Jennifer T
Broom, J E
Hammingson, J A
Dayrit, Fabian M
Montaño, M N E
Dancel, M C
Niñonuevo, M R
Furneaux, R H
Structural analysis of carrageenan from farmed varieties of Philippine seaweed
description Kappaphycus alvarezii, Eucheuma denticulatum and, more recently, Kappaphycus sp. ‘Sacol’ variety, are the carrageenan-containing red seaweeds currently farmed in the Philippines. The Kappaphycus sp. ‘Sacol’ variety is of particular interest to the Philippine seaweed industry because of its improved resistance to ‘ice-ice’ disease and its fast growing characteristics. Here we report on the detailed chemical analysis of the carrageenan from this species. The native and alkali-modified carrageenans from Kappaphycus sp. ‘Sacol’ variety were characterized by FT-IR, 1H and 13C NMR spectroscopy, and constituent sugar and methylation analyses and were compared to those from K. alvarezii, K. cottonii and Eucheuma denticulatum. The three Kappaphycus species contained predominantly κ-carrageenan with low levels of ι-carrageenan, methylated carrageenan and μ-precursor residues, while Eucheuma denticulatum contained predominantly ι-carrageenan with significant amounts of ν-precursor residues. Taxonomic classification of Kappaphycus species based on morphology has proved to be difficult because of their known plasticity. Molecular analysis using the rbcLsequence revealed that the Kappaphycus sp. ‘Sacol’ variety is most likely a form of K. cottonii.
format text
author Aguilan, Jennifer T
Broom, J E
Hammingson, J A
Dayrit, Fabian M
Montaño, M N E
Dancel, M C
Niñonuevo, M R
Furneaux, R H
author_facet Aguilan, Jennifer T
Broom, J E
Hammingson, J A
Dayrit, Fabian M
Montaño, M N E
Dancel, M C
Niñonuevo, M R
Furneaux, R H
author_sort Aguilan, Jennifer T
title Structural analysis of carrageenan from farmed varieties of Philippine seaweed
title_short Structural analysis of carrageenan from farmed varieties of Philippine seaweed
title_full Structural analysis of carrageenan from farmed varieties of Philippine seaweed
title_fullStr Structural analysis of carrageenan from farmed varieties of Philippine seaweed
title_full_unstemmed Structural analysis of carrageenan from farmed varieties of Philippine seaweed
title_sort structural analysis of carrageenan from farmed varieties of philippine seaweed
publisher Archīum Ateneo
publishDate 2005
url https://archium.ateneo.edu/chemistry-faculty-pubs/106
https://www.degruyter.com/view/journals/botm/46/2/article-p179.xml
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