Cortical integration in tetrahymena: An exercise in cytogeometry

✍ Scribed by Nanney, D. L.

• Book ID: 102889757
• Publisher: John Wiley and Sons
• Year: 1966
• Tongue: English
• Weight: 738 KB
• Volume: 161
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1401610302

✦ Synopsis

The numbers and positions of contractile vacuole pores (CVP) have been examined in strains representing ten genetically isolated groups of Tetrrehymena p y r i f o m i s . In all strains the position of the CVP's moves, relative to the individual ciliary rows, as a function of the total number of ciliary rows in the cortex (Corticotype). Similarly, the number of CVP's vanes in a systematic way through the corticotypic array in each strain. The development of contractile vacuole pores, is shown to be regulated by gross geometrical properties of the cortex and can be described with the aid of a simple geometrical model. At least three classes of strains can be distinguished by the patterns of correlation between C W position and corticotype. Further discriminations are possible within each class through the relationships between CVP number and corticotype. These observations aid in understanding ciliate morphogenesis and Tetrahymena taxonomy.