温度和盐度对短节硬毛藻(Chaetomorpha brachygona Harvey)生长发育的影响研究  

EFFECTS OF TEMPERATURE AND SALINITY ON GROWTH AND DEVELOPMENT OF MARINE GREEN ALGAL CHAETOMORPHA BRACHYGONA HARVEY

作　　者：丁兰平[1] 李雯诗 谭华强[1] 颜泽伟[1] 黄冰心[1] 

机构地区：[1]汕头大学,汕头515063

出　　处：《海洋与湖沼》2015年第1期191-196,共6页Oceanologia Et Limnologia Sinica

基　　金："十二五"国家科技支撑项目资助;2012BAC07B05号;国家自然科学基金面上项目资助;31400186号;31270257号;广东省科技计划项目资助;2011B031100010号

摘　　要：利用双因素实验和单藻培养等方法,对采自广东南澳岛的短节硬毛藻(Chaetomorpha brachygona Harvey)进行研究,在不同温度和盐度条件下,对该硬毛藻的生长、活力以及形态进行了观察与测定。结果表明,温度和盐度对短节硬毛藻的生长均有一定影响,当温度为20°C时,藻体培养第3、6和12天活力分别为0.70—0.75Y、0.60—0.70Y和0.55—0.65Y,培养12天时藻体有生殖细胞形成,此温度有利于藻体维持活力;温度为25—30°C时,培养第3天时会大量形成生殖细胞;在盐度10、20、40和50时,藻体的生长与温度相关,即30°C>25°C>20°C;在盐度20—30时,藻体长度最大达4.55 cm;在盐度10—30时,更有利于藻体生长,整体趋势为20>30>10>40>50。因此,实验条件下,温度25—30°C、盐度10—30更利于短节硬毛藻的生长和形成生殖细胞。本实验表明,短节硬毛藻为暖水、广盐性种,有可能在我国南方海区大量生长并扩散,具有引发绿潮的潜力。Growth, vitality, and morphology of unialgal-cultured Chaetomorpha brachygona Harvey from Nan'ao Island, Shantou, China were observed and measured at different points of temperature and seawater salinity. Result revealed that its growth and development were affected by the two factors. At 20°C, the range of its vitality on Days 3, 6, and 12 were 0.70—0.75 Y, 0.60—0.70 Y, and 0.55—0.65 Y, respectively, and some reproductive cells still formed up on Day 12. In 25—30°C, a large amount of reproductive cells were formed on Day 3. In salinities 10, 20, 40, and 50, the growth rate was in order of 30°C>25°C>20°C. Salinities 10—30 were appropriate to its plant growth in an order of 20>30>10>40>50, maximum at the growth length of 4.55 cm in salinities 20—30. Generally, 25—30°C and salinities 10—30 are favorable conditions for the development and the formation of germ cells. It shows that this alga is a temperate and euryhaline species. It is a potential green tidal species and could probably spread over in the southern coast of China.

关 键 词：短节硬毛藻 环境因子 绿潮藻 量子产量Yield 

分 类 号：Q949.2[生物学—植物学]