한국산 꼬시래기 (Gracilaria verrucosa)의 사분포자체와 배우체의 한천 수율 및 특성의 계절적,지역적 변화 = Seasonal and Regional Variations of Agar Yield and Properties of Tetrasporophytes and Gametophytes in Korean Gracilaria verrucosa

다국어 초록 (Multilingual Abstract)

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다국어 초록 (Multilingual Abstract)

The effect of season, life stages and harvesting sites on the yield and properties of agars extracted from Gracifaria verrucosa were determined. G. verrucosa were collected seasonally from November 2001 to August 2002 at Cheongsapo and Boryong, Korea. The plants were sorted into the different life stages (tetrasporophytes and gametophytes) and dried at 60℃ . The yield, sulfate, protein, uronic acid and 3,6-anhydrogalactose of the agar were determined, and standard parameters of physical quality were measured. No differences were found in yield and properties of agars from the two different harvesting sites and from life history phases. The yield of agar was maximum in summer (17.3-20.0%) and minimum in winter (11.9-13.1%). Maximum gel strength occurred in winter when the agar yield and sulfate content were low. Gel strength was negatively correlated with agar yield. Seasonal variations in agar yield and its quality were discussed in a view to managing the exploitation of this resource.