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Inhibition of growth and synchronised cell division in the shoot apex in relation to flowering in Silene

Susan Grose and R.F. Lyndon
Planta
Vol. 161, No. 4 (1984), pp. 289-294
Published by: Springer
Stable URL: http://www.jstor.org/stable/23377238
Page Count: 6
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Inhibition of growth and synchronised cell division in the shoot apex in relation to flowering in Silene
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Abstract

When plants of Silene coeli-rosa (L.) Godron were induced by seven long days, then exposed to darkness for 48 h before being returned to short days, they went on to initiate flowers with a delay of about 2 d. The synchronisation of cell division which normally occurs before flower initiation was suppressed, showing that it is not essential for flowering. Periods of darkness of up to 240 h inhibited apical growth and leaf initiation but did not prevent eventual flowering in short days. The commitment of the apex to flower was therefore maintained while apical growth was inhibited.

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