Abstract
Respiration rate and ethylene production were measured in inflorescence buds and the surrounding tissue on fruiting and non-fruiting trees of pistachio ( Pistacia vera cultivar ‘Aegenes’). The buds from fruiting trees had higher respiration rates than non-fruiting ones, before and during the abscission period. In contrast, the ethylene production in buds was not significantly different between fruiting and non-fruiting trees. The results indicate that in inflorescence buds, an increased respiration preceded their abscission, and that endogenous ethylene production is not related to bud abscission in pistachio.
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