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沈萍萍, 王艳, 齐雨藻, 谢隆初, 吕颂辉, I. J. Hodgkiss. 球形棕囊藻的生长特性及生活史研究[J]. 水生生物学报, 2000, 24(6): 635-643.
引用本文: 沈萍萍, 王艳, 齐雨藻, 谢隆初, 吕颂辉, I. J. Hodgkiss. 球形棕囊藻的生长特性及生活史研究[J]. 水生生物学报, 2000, 24(6): 635-643.
SHEN Ping-ping, WANG Yan, QI Yu-zao, XIE Long-chu, LU Song-hui, I. J. Hodgkiss. GROWTH CHARACTERISTICS AND LIFE CYCLE OF PHAEOCYSTIS GLOBOSA SCHERFFEL[J]. ACTA HYDROBIOLOGICA SINICA, 2000, 24(6): 635-643.
Citation: SHEN Ping-ping, WANG Yan, QI Yu-zao, XIE Long-chu, LU Song-hui, I. J. Hodgkiss. GROWTH CHARACTERISTICS AND LIFE CYCLE OF PHAEOCYSTIS GLOBOSA SCHERFFEL[J]. ACTA HYDROBIOLOGICA SINICA, 2000, 24(6): 635-643.

球形棕囊藻的生长特性及生活史研究

GROWTH CHARACTERISTICS AND LIFE CYCLE OF PHAEOCYSTIS GLOBOSA SCHERFFEL

  • 摘要: 对球形棕囊藻不同的藻株(香港株HK和汕头株ST)在实验室条件下分别进行了形态学,生活史及生长曲线的研究,结果表明:球形棕囊藻具有一个复杂的异型生活史,具有两种不同的生活形态:群体和游离的单细胞,香港株和汕头株二者单细胞呈球形或近球形,直径大多为3-9μm;群体呈中空的球形囊泡,细胞包埋在胶质囊中较均匀分布,但二者群体大小有较大差异。当培养达到一定阶段,群体衰亡破裂释放大量单细胞。批次培养中球形棕囊藻的生长周期约为20-30d,香港株最适生长温度接近25℃,最大比生长率为038;汕头株的最适生长温度接近30℃,最大比生长率为042,这说明温度是重要的生长限制因子之一。

     

    Abstract: Two different strains of Phaeocystis globosa were isolated respectively from the coastal waters of Hong Kong (HK) and Shantou (ST) of Guangdong Province. Their morphology, life cycle and growth curves under laboratory conditions with batch culture method were examined. The life cycle of P. globosa is complex and heteromorphic, exhibiting alternations between two different morphological forms-free-living cells (motile and non-motile cells) and colonies. The free-living cells of the two strains were showed in globose form about 3-9 μm in diameter while the colonies were different in size. The colonies of Shantou strain which were up to maximum 3.0 cm in diameter in field study were much larger than those of Hong Kong strain. The free-living cells reproduced by repeated bipartition and these cells were aggregated forming a colony. In these colonies, cell division and subsequent enlargement resulted in growth. When the nutrition in culture were depleted, the colonies were lysised or decayed and thousands of free-living cells were released. The growth cycle of P. globosa takes about 20-30 days in batch culture. The growth rate of two strains varied from each other under three different temperatures (20℃,25℃,30℃),and their optimal growth temperature was 25℃ for the Hong Kong strain and 30℃ the Shantou strain. Their corresponding maximum specific growth rate were 0.38 and 0.42, respectively. It is concluded that temperature was one of the important factors limiting the growth of the algae.

     

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