. The biology of Stentor. Stentor. 136 THE BIOLOGY OF STENTOR I. The course and spectrum of cell interactions Enlarging upon these statements, we shall at first and for the most part confine our account to regenerators and their parts interacting with non-differentiating stentors (Tartar, 1958b). When a sector bearing the primordium and a few macronuclear nodes is cut out of a regenerator, development of the anlage con- tinues as the fragment regenerates a small stentor; or when the sector is grafted into the back of another regenerator, both host and donor primordia continue differentiating a
. The biology of Stentor. Stentor. 136 THE BIOLOGY OF STENTOR I. The course and spectrum of cell interactions Enlarging upon these statements, we shall at first and for the most part confine our account to regenerators and their parts interacting with non-differentiating stentors (Tartar, 1958b). When a sector bearing the primordium and a few macronuclear nodes is cut out of a regenerator, development of the anlage con- tinues as the fragment regenerates a small stentor; or when the sector is grafted into the back of another regenerator, both host and donor primordia continue differentiating and produce a doublet or bistomial stentor. These tests show that such sectors contain all that is necessary for anlagen development and that the grafting operation itself has no effect on this process. But if a B. Fig. 34. A. Induced primordium resorption. Sector of a stage-3 regenerator grafted to a non-differentiating host (a), b: Anlage is promptly resorbed, but not the multiplied fine striping encompassed by it. c: Specimen undergoes regeneration- reorganization because added primordium site does not subtend mouthparts, and a doublet is formed (d). B. Accelerated reformation of primordium after excision. a: Primordium and site removed, b: Rift soon appears in previously closed line of heal, c: Primordium appears in rift within an hour after operation and there is no multiplication of adjacent lateral stripes, d: Only relatively few and broad stripes are hence carried into the frontal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tartar, Vance, 1911-. New York, Pergammon Press
Size: 1931px × 1294px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, bookleafnumber152
