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    Seasonal variations of agar extracted from different life stages of Gracilaria cliftonii (Gracilariales, Rhodophyta) from Western Australia

    Access Status
    Fulltext not available
    Authors
    Munoz, Julieta
    Fotedar, Ravi
    Date
    2011
    Type
    Journal Article
    
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    Citation
    Munoz, J. and Fotedar, R. 2011. Seasonal variations of agar extracted from different life stages of Gracilaria cliftonii (Gracilariales, Rhodophyta) from Western Australia. African Journal of Marine Science. 33 (1): pp. 59-65.
    Source Title
    African Journal of Marine Science
    DOI
    10.2989/1814232X.2011.572337
    ISSN
    1814-232X
    School
    Department of Applied Biosciences
    URI
    http://hdl.handle.net/20.500.11937/8069
    Collection
    • Curtin Research Publications
    Abstract

    Seasonality in yield, physical and chemical properties of the native agar from different life stages of Gracilaria cliftonii was investigated over a period of six seasons (autumn 2008–winter 2009). Agar yield and its properties varied as a function of seasons and life stages but there was no significant correlation between environmental factors and agar properties (p > 0.05). Native agar varied from 53.6% to 59.6% dry basis over the study period. Agar yield of the tetrasporophyte was significantly higher in autumn 2008 than spring 2009. Gelling temperature of agar varied between 34 and 36 °C, whereas melting point varied from 77 to 84.3 °C. Sulphate of the agar from different life stages of G. cliftonii varied from 5.9% to 6.6% dry basis but was not influenced by seasons (p > 0.05). The present study demonstrated that agar yield and its properties are influenced both by seasons and reproductive status of the thallus.

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