Nuclear Metabolic Aspects and Root Cap Renewal in<i>Allium Cepa</i>

Innocenti, A. M.; Stefani, A.

doi:10.1080/00087114.1977.10796693

Cited by 2 publications

(1 citation statement)

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“…The quiescent centre may be stimulated to divide both when the reproductive future of the dividing cells is damaged as a result of experimental treatments like irradiation (Clowes, 1972), decapitation (Clowes, 1970) or cold (Clowes & Stewart, 1967), and when sucrose starvation produces a decrease in the mitotic rates of the surrounding cells (Rost & Van't Hof, 1973;Webster, 1973). It is particularly noteworthy that ascorbic acid stimulates tbe quiescent centre since this is a compound which is utilized in several metabolic processes (De Leo et al, 1973;Arrigoni, Arrigoni-Liso & Calabrese, 1976, 1977Arrigoni et al, \977h, 1979;Kvidente et al, 1983;Liso et al, 1985).…”

Section: I S C If S S R O Nmentioning

confidence: 99%

Ascorbic acid‐induced progression of quiescent centre cells from G₁ to S phase

et al. 1988

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S L" M M A R YQuiescent centre cells, which are known to have their cycle extended mostly in G, and to divide rarely, are stimulated to undergo DNA synthesis in root meristems of Allium cepa L. by treatment with ascorhic 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 X l()''//m'' in water-grown roots, the \olume of the quiescent centre drops to a mean value ot 167 x lO' /(m' 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 througli tlie cycle may be related to cellular ascorbic acid content.

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Section: I S C If S S R O Nmentioning

confidence: 99%