红色角毛虫生理改组过程的研究

STUDY OF THE PHYSIOLOGICAL REORGANIZATION ON KERONOPSIS RUBRA

红色角毛虫在生理改组时,随着老纤毛器的瓦解,先后出现新的口器,额、腹、横棘毛,左、右缘棘毛和背触毛四个原基区,并发生原基区的分化、新结构的形成和定位。这种新、老结构的更替过程相似于同种纤毛虫正常形态发生时期纤毛器的演化过程,口围带改组时,新口围带原基在左列中腹棘毛左侧的范围形成,后来,随着老口围带的瓦解,它向前方移动并处于老口围带的右侧,并继续朝老口围带位置移动、替换老口围带。这不同于其他常见的腹毛类纤毛虫,生理改组时新口围带原基在瓦解着的老口围带的位置逐渐移动替换老口围带的情况。

During physiological reorganization of Keronopsis rubra,when old ciliatures disintegrate,the primor-dia of the new AZM,UM,F-V-T cirri,and left-and right marginal cirri appear orderly.Soon,the differentiation of the primordia,the formation and localization ofthe new structures occur.The process of the replacement of the old structures by the new ones is similar to the ciliatural evolution of this ciliate during morphogenesis;When AZM reorganizes,new AZM primordium develops in the left side of the left middle ventral cirri,moves towards the old AZM and replaces it,continuously.The event is different from other hypotrichs,in which,during physiological reorganization,new AZM primordium moves and replaces the old structures in the old AZM,gradually.