Studies on reproductive biology of Hemiaulus sinensis Ⅱ. Morphological structures of vegetative cell and resting spore;

In order to learn more about the growth and development of unisexual vegetative cells of Porphyra haitanensis,female and male vegetative tissues and cells of P.

The macronuclear and mitochondria DNA between the resting and the vegetative cell of Euplotes encysticus were comparatively analyzed by using RAPD technique in order to explore the acting feature of two genetic systems in the resting cell of ciliates.

By the combination of serial selective extraction,with diethylene glycol distearate (DGD) embedment and embedment-free electron microscopy,as well as SDS-PAGE,the inter- mediate filament (IF) matrix system,which is composed of the filament about 10 nm in diameter and filament band,was observed in vegetative cells and resting cysts of Euplotes encysticus.

Ultrastructural observations made from the vegetative cells of Gracilaria bursa pastoris (Gmel.

In shallow sea,the excretions of cultivated organisms,fouling organisms and wild fish,exchanges of nutrient at the interface between water and sediment or particulate matters are the major nutrient salt sources of self-pollution in culture system.