Synchronisation of cell division during transition to flowering inSilene apices not due to increased symplast permeability
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Summary
Seven long days induce flowering inSilene coelirosa.Francis andLyndon (1979) reported a strong synchronization of cell division in the apex on the eighth day. This could be due to a sharp fall in apical cell isolation, leading to syncytium formation or to increased cell isolation, leading to the derepression of cell division. To test the degree of cell isolation, a range of water soluble fluorescent probes was injected into either non-induced or induced apices just before, or at the time of the synchronous division. Probes of molecular size up to 665 daltons moved through vegetative apices. Those of size up to 536 daltons moved in the induced apices. Hence, as judged by this criterion the cells in the induced apices are more isolated than those in non-induced apices. Thus the induced synchronous division may be due to an increase in cell isolation.
Keywords
Flowering Fluorescent probes Intercellular communication Silene Synchronous cell divisionPreview
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