Low Temperature Stimulates Cell Enlargement and Intracellular Calcification of Coccolithophorids
Low Temperature Stimulates Cell Enlargement and Intracellular Calcification of Coccolithophorids
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DOI：
10.1007/s10126-004-0478-1
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发表时间：
2005-03
影响因子：
3
通讯作者：
J. Sorrosa;Manami Satoh;Y. Shiraiwa
中科院分区：
文献类型：
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作者：
J. Sorrosa;Manami Satoh;Y. Shiraiwa
在较宽的温度范围(10℃-25℃)下，研究了温度对球藻生长、细胞大小、钙吸收活性和球藻产量的影响。海洋生长仅限于较温暖的温度(20°C-25°C)。细胞大小与温度呈负相关。在低温下，荧光显微镜和偏光显微镜分别从形态上证实了叶绿体和细胞的增大以及球石的产生。结果表明，低温抑制球藻的生长，但诱导细胞增大，并刺激细胞内钙化，产生球藻。
Temperature effect on growth, cell size, calcium uptake activity, coccolith production was studied in coccolith-producing haptophytes,Emiliania huxleyi(Lohmann) Hay & Mohler (strain EH2) andGephyrocapsa oceanicaKamptner (strain GO1) (Coccolithophorales, Prymnesiophyceae).E. huxleyigrew at a wider temperature range (10°–25°C), whileG. oceanicagrowth was limited to warmer temperatures (20°–25°C). Cell size was inversely correlated with temperature. At low temperature, the enlargement of chloroplasts and cells and the stimulation of coccolith production were morphologically confirmed under fluorescent and polarization microscopes, respectively.45Ca uptake byE. huxleyiat 10°C was greatly increased after a 5-day lag and exceeded that at 20°C. These results clearly showed that low temperature suppressed coccolithophorid growth but induced cell enlargement and as stimulated the intracellular calcification that produces coccoliths.