GROWTH AND DIFFERENTIATION OF PLANT TISSUE CULTURES .3. INITIATION AND PATTERN OF CELL DIVISION IN DEVELOPING CALLUS CULTURES

The factors affecting the initiation and subsequent pattern of cell division in the early stages of callus development have been investigated using cultured isolated explants from the Jerusalem Artichoke (Helianthus tuberosus). The results obtained have been interpreted to explain the possible role played by products of autolysis in restricting almost all of the cell divisions to the periphery of the tissue. An attempt has also been made to elucidate the factors which may determine the exponential increase in cell number which succeeds the initial lag phase. © 1968 OXFORD UNIVERSITY PRESS.