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Changes in polyamine concentration associated with aging in Pinus radiata and Prunus persica
Mario F Fraga1, María Berdasco, L Borja Diego
1Lab. Fisiología Vegetal, Dpto. Biología de Organismos y Sistemas, Universidad de Oviedo, C/Catedrático Rodrigo Uría s/n, E-33071 Oviedo, Spain. mffraga@cnio.es
Abstract:
Endogenous polyamine concentrations in apical buds of peach (Prunus persica (L.) Batsch cv. 'Hakuho') and monterey pine (Pinus radiata D. Don) seedlings, saplings and mature trees were analyzed by high performance liquid chromatography coupled with fluorescence detection to establish physiological correspondences and disparities between the species. Although there were many differences in polyamine metabolism between peach and monterey pine, several similarities were found. Specifically, in both species, the ratio between concentrations of free polyamines and low molecular-weight polyamine conjugates was greater than and less than unity in juvenile and adult plants, respectively. Free putrescine concentration decreased with age in both species.
