Abstract
Initial swelling and early tuber enlargement are the result of cell enlargement at a rate surpassing addition of new storage cells. New phloem strands are added by procambial activity. New storage cells are formed marginal to the phloem strands. Frequency of divisions in these new cells rapidly decreases.
Tubers in which mitotic processes are compapratively restricted in early stages of development are slow growers; i.e., cell enlargement proceeds with fewer cells present. Tubers in which more phloem strands and associated cells have been added in early growth are rapid growers and contain more enlarging cells.
Reduction in mitotic rate concurrently with increased cell enlargement progresses radially from each phloem strand in young tubers. Cell divisions are rare in all young storage tissues by the time a tuber has attained a size of 30 to 40 g, except in the immediate sites of “eye” buds. Some cell divisions are nececssary for phloem strands to keep pace with tuber enlargement, and also for formation of phellogen. Volumetric increase in these highly localized areas accounts for a small percentage of the increase in tuber volume resulting from enlargement of cells.
Similar content being viewed by others
Literature Cited
Artschwager, E. 1924. Studies on the potato tuber. J. Agr. Res. 27: 809–835.
Bradbury, D. 1953. Division of starch-containing cells. Amer. J. Bot. 40: 286–288.
Houghtaling, H. B. 1935. A developmental analysis of size and shape in tomato fruits. Bull. Torrey Bot. Club 62: 243–252.
Lehmann, R. 1926. Untersuchungen über die Anatomie der Kartoffelknolle, under besonderer Burücksichtigung des Dickenwachstums und der Zellgrösse. Planta 2: 87–131.
Linehan, D. J., C. E. Stooke and J. C. Hughes. 1968. The importance of cell size in influencing the texture of the cooked potato. I. Preliminary observations. Eur. Potato J. 11: 221–225.
Plaisted, P. H. 1957. Growth of the potato tuber. Plant Physiol. 32: 445–453.
Reeve, R. M., E. Hautala and M. L. Weaver. 1969. Anatomy and compositional variation within potatoes. I. Developmental histology of the tuber. Amer. Potato J. 46: 361–373.
Reeve, R. M., M. L. Weaver and H. Timm. 1971. Anatomy and compositional variation within potatoes. IV. Total solids distribution in different cultivars. Amer. Potato J. 48: 269–277.
Reeve, R. M., H. Timm and M. L. Weaver. 1971. Cell size in Russet Burbank potato tubers grown with various levels of nitrogen and soil moisture tensions. Amer. Potato J. 48: 450–456.
Reeve, R. M., H. Timm and M. L. Weaver. 1972. Parenchyma cell growth in growing potato tubers. I. Different tuber regions. Amer. Potato J. (in press).
Smith, O. 1968. Environmental Factors. Chap. 12In Potatoes: Production, Storage, Processing. The Avi Publishing Company, Inc., Westport, Conn.
Smith, W. H. 1950. Cell-multiplication and cell enlargement in the development of the flesh of the apple fruit. Amer. Bot. N.S. 14: 23–38.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Reeve, R.M., Timm, H. & Weaver, M.L. Parenchyma cell growth in potato tubers II. Cell divisions vs. cell enlargement. American Potato Journal 50, 71–78 (1973). https://doi.org/10.1007/BF02852767
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02852767