FORMATION AND GERMINATION OF RESTING SPORES OF Chaetoceros didymus EHRENBERG (BACILLARIOPHYTA)

• 作 者: 林均民 T.G.CHIN金德祥
• 机 构: Department of Biology, Xiamen University, Xiamen\\r\\r\\r\\r\\r\\r\\r\\r\\n,Depart
• 出 处: Acta Oceanologica Sinica
• 发表日期: 2004年期
• 关键词: ecology resting taxonomy salinity vegetative newborn sudden mother germination s

Resting spores are important in ecology and taxonomy of diatoms as well known to every dia-tomist. If NO3-N and NO2-N in the cultures drop down to 4 μg I-1, or at a relatively small amount of N, higher in number of individuals and sudden increasing of salinity, the resting spores will produce after 24 h. Paired spores are present in the newborn spore-mother cells. At 20℃ and 6000 lx in a fresh medium, spores will be germinated into vegetative cells within 48 h.

Resting spores are important in ecology and taxonomy of diatoms as well known to every dia-tomist. If NO3-N and NO2-N in the cultures drop down to 4 μg I-1, or at a relatively small amount of N, higher in number of individuals and sudden increase of salinity, the resting spores will produce after 24 h. Paired spores are present in the newborn spore-mother cells. At 20 ° C and 6000 lx in a fresh medium, spores will be germinated into vegetative cells within 48 h