鹿角海萝孢子萌发过程不同发育阶段的形态

Morphological changes of different developmental stages of spore germination of Gloiopeltis tenax

对鹿角海萝(Gloiopeltis tenax)从孢子附着至芽体形成初期各发育阶段的形态进行了描述。鹿角海萝的孢子包括四分孢子和果孢子,其形状和大小相似,球形,直径约22.0μm。2种孢子附着后的发育过程及各发育阶段的形态特征也相似。在水温16℃,海水盐度32,光照强度6000lx(光照周期为12h:12h)条件下,鹿角海萝孢子附着后约22h进行第一次细胞分裂,经过多次分裂,6d后形成初期盘状体,发育最快的盘状体80d后长出芽体。鹿角海萝孢子不同发育阶段的形态与海萝(G.furcata)相似。

Morphological changes of each developing phases of Gloiopeltis tenax spore from spore attachment to formation of burgeons were investigated in the laboratory. G. tenax spores include tetraspore and carpospore which both like balls, having similar morpha and size with a diameter of about 22.0 μm. Development process and morphological changes of these two spore species were also similar. Under the incubation conditions such as salinity of 32, temperature of 16℃ and light intensity of 6 000 lx （ photonperiod of 12 h ： 12 h LD） , the first spore division occurred 22 hours after attachment, and further cell divisions formed a muhieellular disk after 6 days. The disk which developed most quickly began to germinate burgeons after 80 days. Morphological changes of different developing phases of G. tenax spore were similar to those of G.furcata spore.