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Ascorbic acid‐induced progression of quiescent centre cells from G 1 to S phase
Author(s) -
LISO R.,
INNOCENTI A. M.,
BITONTI M. B.,
ARRIGONI O.
Publication year - 1988
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1988.tb00284.x
Subject(s) - ascorbic acid , meristem , cell cycle , allium , biology , botany , biochemistry , cell , plant cell , biophysics , chemistry , microbiology and biotechnology , horticulture , gene
summary Quiescent centre cells, which are known to have their cycle extended mostly in G, and to divide rarely, art‐stimulated to undergo DNA synthesis in root meristems of Allium cepa L. by treatment with ascorbic acid. The effect of ascorbic acid is dramatic: 21% of all the cells in the quiescent centre remain in the G, phase while 79% enter S phase. From a mean value of 2204 × 10 3 μ 3 in water‐grown roots, the volume of the quiescent centre drops to a mean value of 167 × 10 3 μ 3 following treatment with ascorbic acid. These results indicate that ascorbic‐acid stimulates not only the activity of the quiescent centre cells but also cell proliferation in the entire root meristem. The rate of cell progression through the cycle may be related to cellular ascorbic acid content.