Abstract:
The apple tree plantation and environmental conditions represent a
single unit, within which the mutual interdependence and conditioning are
compulsory laws, with a greater influence from environment toward the
vegetal organisms. The change of environmental conditions determines
changes in the metabolism, within the growth and development processes,
having positive or negative influences on plant health and vitality. In this
scientific paper, our goal was to study some aspects concerning the
ecophysiological response of Jonagold and Golden spur varieties to the
climatic conditions of year 2008. Therefore, we have studied the dynamics of
the leaf pigment content during the phenological phases of shoot growth,
fruit growth and ripeness and dormancy beginning for one-year shoots and
branches. The eco-physiological response of the two apple tree varieties was
estimated according to the determination of the content of photosynthetic and
flavonoid leaf pigments. The pigment content from leaves was analysed
spectrophotometrically, being estimated through the light absorption
capacity by the pigment acetone extract (1%) in visible spectrum and in near
UV. The comparative study of the content of leaf pigments in the leaves of the
vegetative and flower shoot may evaluate the various mechanisms
