Resting spore formation of the marine planktonic diatom Chaetoceros anastomosans induced by high salinity and nitrogen depletion
Resting spore formation of the marine planktonic diatom Chaetoceros anastomosans induced by high salinity and nitrogen depletion
复制标题
高盐度和氮消耗诱导海洋浮游硅藻 Chaetoceros anastomosans 静息孢子的形成
DOI：
10.1007/s002270050040
复制
发表时间：
1997
期刊：
影响因子：
2.4
通讯作者：
A. Kamatani
中科院分区：
文献类型：
--
作者：
O. Oku;A. Kamatani
摘要利用分离自相模湾的海洋浮游硅藻角毛藻（Chaetoceros），通过分批培养实验研究了其休眠孢子的形成机制。营养细胞在20.7 - 45.5‰的盐度范围内都能生长，而休眠孢子的形成在硝酸盐缺乏的高盐度（40.0 - 45.5‰）培养基中显著增加。休眠孢子形成速率（1.9 d-1）与营养细胞在正常盐度培养基中指数生长期的比生长速率（1.8 d-1）相当。在高盐条件下形成的休眠孢子的大小小于在正常盐度介质中形成的孢子。与营养细胞不同，休眠孢子似乎具有某种机制，通过抵抗细菌对其细胞壁的攻击而在更广泛的盐度范围内存活。
Abstract The marine planktonic diatom Chaetoceros anastomosans, which was isolated from Sagami Bay, was used for a study of resting spore formation mechanisms in batch culture experiments. Vegetative cells could grow at salinities ranging from 20.7 to 45.5‰, and resting spore formation was enhanced significantly in nitrate-depleted, high salinity media (40.0 to 45.5‰). The rate of resting spore formation (1.9 d−1) was comparable to the specific growth rate (1.8 d−1) of vegetative cells in the exponential growth phase in normal salinity medium. The size of resting spores formed under high salinity conditions was smaller than that of spores formed in normal salinity media. Unlike vegetative cells, resting spores seemed to possess some mechanisms to survive over a wider range of salinities by resisting bacterial attacks on their cell walls.