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Studies on Biology and Ecology of Marine Heterotrophic Dinoflagellates.

海洋异养甲藻生物学和生态学研究。

基本信息

批准号：
63560183
负责人：
FUKUYO Yasuo
金额：
$ 1.6万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

1. Biology and ecology of heterotrophic dinoflagellates were studies using fluorescent microscope with video camera on their feeding behavior, life history and growth physiology.2. Dinophysis fortii and D. acuminata have not only chlorophyll but also phycobilin as photosynthetic pigments. Some cells have the phycobilin only in round or rod-shaped chloroplasts and others have it all over in protoplasm including chloroplasts. As the phycobilin is quite rare pigment in dinoflagellates, it is strongly suspected that the hycobilin comes from cryptomonads or cyanobacters which are ingested into Dinophysis protoplasm by feeding.3. D. forth and D. cuminata ingest cryptomonads into their protoplasm through pores which penetrate their valves after catching the diet on the adhesive valve surface. .4. Particles stained by neutral-red dye can be taken into food vacuole of D. cuminata. This is the second methods of their feeding.5. Suction of protoplasm of a small size cell by a large size cell through flagellar pores were observed during culture of D. fortii. This behavior is very similar to cell fusion in the course of sexual reproduction, but we could not clarify it because the cell after fusion died before showing any morphological change.6. Feeding behavior of Dino hysis Rotundata. a non-photosynthetic dinoflagellate, was observed. The species chooses tintinnids as prey organism. D. rotundata inserts a suction tube to the tintinnid, sending a small amount of fluid to stop movement of the prey. Then D. rotundata suck the protoplasm of the tintinnid. The protoplasm sucked are kept in the manner of many transparent globules inside Dinophysis cell and then assimilated gradually.

1.利用荧光显微镜和摄像机对异养甲藻的生物学和生态学进行了研究，包括摄食行为、生活史和生长生理. Dinophysis fortii和D. acuminata不仅具有叶绿素，而且还具有藻胆素作为光合色素。有些细胞仅在圆形或杆状的叶绿体中含有藻胆素，而另一些细胞则在整个原生质（包括叶绿体）中都含有藻胆素。由于藻胆素是甲藻中非常罕见的色素，因此强烈怀疑藻胆素来源于隐藻或蓝藻，它们通过摄食被摄入甲藻原生质中. D. forth和D. cuminata在附着的瓣表面捕获食物后，通过穿透其瓣的孔将隐单胞菌摄取到其原生质中。.4.中性红染色的颗粒可被D.小茴香这是他们喂养的第二种方法。在培养过程中，观察到一个大细胞通过鞭毛孔对一个小细胞的原生质进行抽吸。fortii。这种行为与有性生殖过程中的细胞融合非常相似，但由于融合后的细胞在出现任何形态学变化之前就已经死亡，因此我们无法对其进行澄清.圆齿龙的摄食行为一种非光合作用的甲藻。该物种选择tintinnids作为猎物生物。D.圆齿龙将一根吸管插入到锡罐虫体内，向其输送少量液体以阻止猎物移动。然后是D.圆齿龙吸食锡虫的原生质被吸出的原生质以许多透明小球的形式保存在甲藻细胞内，并逐渐被同化。