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Cytochemical investigations in apices of apple buds with special reference to flower initiation

, : Cytochemical investigations in apices of apple buds with special reference to flower initiation. Acta Horticulturae (80): 193-198

Terminal buds were harvested from apple, Jonathan, spurs bearing fruits and from those without fruits, and the DNA, DNA+RNA and nucleohistone contents in various regions of the apex were measured cytophotometrically. Some of the trees had been sprayed in May with Ethrel or the morphactin EMD 7311 W. Presence of the fruit was associated with a lower level of nucleic acids and a higher nucleohistone content, inhibiting flower initiation.

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