摘要
中华半管藻以频繁的细胞分裂进行繁殖。实验结果表明，该藻每天的细胞分裂和叶绿素合成呈现一定的节律性，在光暗各１２ｈ条件下，每天光照８ｈ后形成最大的分裂高峰，黑暗后２ｈ出现分裂次高峰。进入光照期，叶绿素合成开始，继之增长率急剧上升，８ｈ后达到最高值，黑暗期细胞增殖率和叶绿素增长率迅速下降，并降至全日最低值。适温范围为８－３２℃，生长的最适温度在２５－３０℃之间，适盐范围为７－５０，最适盐度为２８左右，最适光照强度为７５μＥｉｎ·ｍ￣＿（－２）·ｓ￣（－１）．同时根据实验结果，建立了中华半管藻种群生长与环境因子关系的多元回归动态模型。
ell division was found to be the major reproductive manner of Hemiaulus sinensis, an estuarine diatom. The experimental results revealed that this species present a diurnal period-icity in cell division and chlorophyll synthesis. Under a 12hL:12hD condition,the highestpeak of cell division appeared after 8 hour illumination, and the second peak appeared after 2hour darkness ,while chlorophyll synthesis had also got the highest peak after 8 hour illumi-nation and then decreased gradually to the lowest value at the end of the dark.H. sinensis had an optimal salinity of 28,a suitable salinity in the range of 7-50,an optimal temperature inthe range of 25-30℃,and a saturated light intensity of 75 μEin. m￣(-2). s￣(-1), for its growth. Dy-namic surface models based on multiple regression were developed to represent the overall re-lationship between the reproductive rate(μ)of this diatom species and the environmentalconditions,It was thus concluded that H. sinensis was a subtropical and wide-rage-of salini-ty adapted species of algae.
出处
《生态学报》
CAS
CSCD
北大核心
1995年第1期32-38,共7页
Acta Ecologica Sinica
关键词
中华半管藻
昼夜节律
增殖率
环境因子
藻类
Hemiaulus sinensis Greville, diurnal periodicity, growth rate, environmental factors.
