Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia
The effects of sulfate starvation on the agar characteristics of Gracilaria species was investigated by culturing two red algae from Morib, Malaysia, Gracilaria changii and Gracilaria salicornia in sulfate-free artificial seawater for 5 days. The seaweed samples were collected in October 2012 and Ma...
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| Format: | Article |
| Language: | English |
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Springer
2014
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| Online Access: | http://psasir.upm.edu.my/id/eprint/37398/ http://psasir.upm.edu.my/id/eprint/37398/1/Effects%20of%20sulfate%20starvation%20on%20agar%20polysaccharides%20of%20Gracilaria%20species.pdf |
| _version_ | 1848848597960884224 |
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| author | Lee, Wei Kang Namasivayam, Parameswari Ho, Chai Ling |
| author_facet | Lee, Wei Kang Namasivayam, Parameswari Ho, Chai Ling |
| author_sort | Lee, Wei Kang |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The effects of sulfate starvation on the agar characteristics of Gracilaria species was investigated by culturing two red algae from Morib, Malaysia, Gracilaria changii and Gracilaria salicornia in sulfate-free artificial seawater for 5 days. The seaweed samples were collected in October 2012 and March 2013, periods which have significant variation in the amount of rainfall. The agar yields were shown to be independent of sulfate availability, with only 0.60–1.20 % increment in treated G. changii and 0.31–1.40 % increment in treated G. salicornia while their gel strengths did not increase significantly (approximately 5–7 %) after sulfate starvation for both species. The gelling and melting temperatures did not vary between control and treated samples from both species, except for the treated G. changii collected in March 2013. The gel syneresis index of G. salicornia collected in March 2013 increased significantly after sulfate deprivation. Sulfate starvation introduced some variations in the content of 3, 6-anhydrogalactose and total sulfate esters, but the changes did not have a pronounced effect on the physical properties of agar. |
| first_indexed | 2025-11-15T09:37:02Z |
| format | Article |
| id | upm-37398 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:37:02Z |
| publishDate | 2014 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-373982015-10-01T02:39:15Z http://psasir.upm.edu.my/id/eprint/37398/ Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia Lee, Wei Kang Namasivayam, Parameswari Ho, Chai Ling The effects of sulfate starvation on the agar characteristics of Gracilaria species was investigated by culturing two red algae from Morib, Malaysia, Gracilaria changii and Gracilaria salicornia in sulfate-free artificial seawater for 5 days. The seaweed samples were collected in October 2012 and March 2013, periods which have significant variation in the amount of rainfall. The agar yields were shown to be independent of sulfate availability, with only 0.60–1.20 % increment in treated G. changii and 0.31–1.40 % increment in treated G. salicornia while their gel strengths did not increase significantly (approximately 5–7 %) after sulfate starvation for both species. The gelling and melting temperatures did not vary between control and treated samples from both species, except for the treated G. changii collected in March 2013. The gel syneresis index of G. salicornia collected in March 2013 increased significantly after sulfate deprivation. Sulfate starvation introduced some variations in the content of 3, 6-anhydrogalactose and total sulfate esters, but the changes did not have a pronounced effect on the physical properties of agar. Springer 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/37398/1/Effects%20of%20sulfate%20starvation%20on%20agar%20polysaccharides%20of%20Gracilaria%20species.pdf Lee, Wei Kang and Namasivayam, Parameswari and Ho, Chai Ling (2014) Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia. Journal of Applied Phycology, 26 (4). pp. 1791-1799. ISSN 0921-8971; ESSN: 1573-5176 http://link.springer.com/article/10.1007%2Fs10811-013-0231-0 10.1007/s10811-013-0231-0 |
| spellingShingle | Lee, Wei Kang Namasivayam, Parameswari Ho, Chai Ling Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title | Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title_full | Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title_fullStr | Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title_full_unstemmed | Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title_short | Effects of sulfate starvation on agar polysaccharides of Gracilaria species (Gracilariaceae, Rhodophyta) from Morib, Malaysia |
| title_sort | effects of sulfate starvation on agar polysaccharides of gracilaria species (gracilariaceae, rhodophyta) from morib, malaysia |
| url | http://psasir.upm.edu.my/id/eprint/37398/ http://psasir.upm.edu.my/id/eprint/37398/ http://psasir.upm.edu.my/id/eprint/37398/ http://psasir.upm.edu.my/id/eprint/37398/1/Effects%20of%20sulfate%20starvation%20on%20agar%20polysaccharides%20of%20Gracilaria%20species.pdf |