Lethality of the Heliozoon Oxnerella maritima on the Rotifer Brachionus rotundiformis
Lethality of the Heliozoon Oxnerella maritima on the Rotifer Brachionus rotundiformis
复制标题
海洋日光虫对圆臂轮虫的致死率
DOI：
10.2331/fishsci.63.543
复制
发表时间：
1997
影响因子：
1.9
通讯作者：
A. Hino
中科院分区：
文献类型：
--
作者：
S. Cheng;T. Suzaki;A. Hino
当轮虫的生产变得不稳定时，从轮虫的大规模培养池中分离出一个日光虫。绿藻衣藻（Chlamydomonas sp.）较四体四足藻、栽培纳米绿藻和面包酵母更适合于helozoer的繁殖。当日光虫与轮虫一起放置时，轮虫逐渐停止运动，沉到底部，最终死亡。轮虫24小时LC50约为104只。/毫升。孤立的日光虫是自由生活的，具有圆形，10-15ƒÊmƒÓ细胞体。它有一个偏心的细胞核，但在细胞体的中心有一个中心体，它辐射轴系微管。透射电镜观察显示，每个轴突由六个六边形排列的微桶状规则组成。此外，在细胞表面未观察到涂层结构。根据这些特征，我们确定该物种为海洋Oxnerella。这是首个日耳虫杀死轮虫的记录
A heliozoon was isolated from a mass culture tank for rotifers when the production of the rotifer became unstable. The green algae Chlamydomonas sp. was a more suitable food for the propagation of the heliozoon compared to Tetraselmis tetrathele, Nannochloropsis oculataand baker's yeast. When the heliozoon was placed with the rotifer, the rotifer gradually ceased to move, sank to the bottom, and finally died. 24 hours' LC50 for the rotifer was about 104 individ. /ml. The isolated heliozoon is free-living and has around-shape, 10-15ƒÊmƒÓ cell body. It has oneeccen tric nucleus, but in the center of the cell body there is a centroplast which radiatesaxonemal microtub ules. TEM observationsrevealed that each axoneme is composed of six hexagonally arranged microtub ules. Further, no coating structure wasobserved on the cell surface. From these characteristics, we identified the species as Oxnerella maritima. This is the first record ofa heliozoon killing the rotifer