Abstract
Ph.D. (Botany)
Some biochemical, physiological and ultrastructural changes in senescing
rose petals of Rosa hydrida L. cultivar 'Sonia ' were determined. Quantitative
determinations of changes in starch content, total free reducing
sugar concentration and the total free amino acid concentration were carriedout.
Changes in membrane permeability (determined as percentage
apparent free space - %AFS) and cell ultrastructure (determined electron
microscopically) were also examined in order to compare physiological
and cytological events. The respiration climacteric was used as a standard
for determining the degree of senescence.