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Levels and Aggregation of Ribosomes during Dormancy and Dormancy Break of Peach Flower Buds
Authors:N BAGNI  G MARINO  P TORRIGIANI  S AUDISIO
Institution:Institute of Botany, University of Bologna, Via Irnerio, 42, 40126 Bologna, Italy
Abstract:The level of ribosomes and their aggregation state (monosomes-polysomes) have been investigated in relation to dormancy in peach flower buds (Prunus persica). The ribosomes were analysed by a linear sucrose gradient. The ribosomal content hardly changes in the bud before dormancy and until dormancy breaks; on the other hand after this period there is a remarkable increase in the ribosomal level strictly related to the increase in bud weight. The ribosomal content reaches the highest value at flowering. During dormancy break the largest portion of ribosomes is localized in flower primordia, not in scales. Polysomes, which are always present in buds, remain constant during dormancy (35%), increase at dormancy breaking, reaching the highest level at flowering.
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