螺旋藻细胞主要物质的转化对其细胞沉浮的作用

Effect of Conversion of Primary Materials on Sinking and Floating in Spirulina Cells

研究结果表明,螺旋藻细胞沉浮受光调控,在强光下碳水化合物大量积累,其细胞相对密度增大使其细胞下沉。利用细胞呼吸作用消耗部分碳水化合物,其细胞依然可上浮。弱光下,部分碳水化合物转化为蛋白质和脂肪,使细胞相对密度减小,其细胞上浮。在该光照条件下,连续光照有利于蛋白质大量合成。在强光下,螺旋藻细胞激发放氧与其碳水化合物积累同时发生,共同导致其细胞下沉,反之亦然。这为研究浮游植物细胞沉浮机制提供了重要的基础。

The study showed that light regulated the settlement and foating of Spirulina cells. The settlement was caused by increase in cell specific gravity due to accumulation of plenty of carbohydrates under bright light; the cells upfloating was caused by consumption of partial carbohydrates owing to respiration. The float was caused by decrease in cell specific gravity which was a result of conversion of partial carbohydrates to proteins and fat under weak light. Successive irradiation of weak light benefited synthesis of plenty of proteins. The sediment was aroused jointly by oxygen release suddenly and carbohydrate accumulation simultaneously stimulated by Spirulina cell under bright light and vice versa. These will provide envidence for the research on mechanism of sediment and float about phytoplankton with critical basis.