冠突伪尾柱虫前仔虫口围带小膜数的调节  

Regulation of the Membranelle Number of AZM in Proter During the Binary Division of Pseudourostyla cristata

作　　者：金立培[1] 

机构地区：[1]中山大学生物学系

出　　处：《中山大学学报（自然科学版）》1996年第4期86-89,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

摘　　要：冠突伪尾柱虫无性分裂时，前仔虫的口围带由新旧小膜拼合而成。During the binary division of Pseudourostyla cristata, the new adoral zone of membranelles(AZM) in the proter is generated from three parts, namely the membranelles assembled by the AZM primordium which connects with the posterior end of the old AZM to form a complcx, the old AZM lapel modified by cutting out about 25 membranelles from the anterior section and the old AZM collar whose several membranelles in both sides have disintegrated. The AZM membranelle number in the proter is regulated and controlled to an appropriate range by addition of new membranelles and reduction of some old ones. The same developmental programming of “addition and subtraction” is also applied to the morphogenesis of cells during physiological reorganization and cells in the 3rd and 4th cortical reorganizations during conjugation in P. cristata. This suggests that there would be simplification of genetical system of P. cristata in evolution, which is convenient for the genetic control.

关 键 词：冠突伪尾柱虫 无性分裂 口围带 小膜 前仔虫 

分 类 号：Q959.117[生物学—动物学]