人工培养牟氏角毛藻对弧菌抑制效果研究

Study on the inhibitory effect of artificial culture Chaetoceros muelleri to vibrio

研究了不同接种密度的牟氏角毛藻培育系统对2种弧菌的抑制效果及其相关性。结果表明牟氏角毛藻培育系统能够抑制2种弧菌的生长,并随着接种密度增加其抑制弧菌所需时间缩短;其中抑制副溶血弧菌的效果好于溶藻弧菌,2种弧菌均可利用牟氏角毛藻营养盐进行快速生长,但是它并没有促进或抑制角毛藻细胞的生长;加入弧菌的角毛藻培育系统中异养细菌的生长随着角毛藻的生长而变化,但是当角毛藻生长到后期,总的异养细菌均达到一个稳定值(约2×105CFU·mL-1),其中A号异养细菌远远超过其它异养细菌的量。A号异养细菌和角毛藻亲和力强而且能相互促进生长。

The inhibitory effect of different density of Chaetoceros muelleri on the vibrios was studied in this paper. The results show that microalgae culture system can inhibit the growth of vibrios. And the more algae density is, the better the inhibitory effect is. The inhibitory effect of mieroalgae culture system to Vibrio alginolyticus is stronger than that to V. parahaemolyticus. Vibrios can make use of algae nutrition anti grow rapidly, but can＇t promote or inhibit algae cell from growing. In the microalgae culture system, the growth of heterotrophic bacteria varied with the density of algae. But at the latter stage of microalgae＇s growing, the quantity of heterotrophie bacteria reached a stable value （ about 2 ×10^5 CFU·mL^-1 ） and the number of strain A was far beyond the total of other heterotrophic bacteria. A mutual growth existed in strain A and chaetoceros because of the high affinity.