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Published on: May 17, 2017
The size of quiescent centre in roots of Allium cepa L. grown with ascorbic acid
A M Innocenti1, M B Bitonti1, O Arrigoni2
1Department of Ecology, University of Calabria, 87036 - Arcavacata di Rende (CS)-Italy.
Abstract:
Following ascorbic-acid treatment a large number of quiescent centre cells undergo DNA synthesis and, at the same time, the cell proliferation in the entire root meristem of Allium cepa is stimulated. The effects of ascorbic acid on dividing cells in the meristem proper and on the quiescent centre are long-lasting since they are obtained in both short- and long-term experiments. Whatever the time of treatment with ascorbic acid and whatever the starting size of the quiescent centre (450 or 1000 cells), there is always a minimum number of quiescent centre cells (90-100) which remain in the G1 phase.
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