The effects of chemical substances on senescence of Weigela florida (Bunge) A. Dc. 'Variegata Nana' cut stems.
Year: 2012
Type: article
Abstract: . In addition to flowers, cut foliage and leafy stems are very valuable florist ma-terial. However, florist greens frequently first loses its ornamental value in a flower ar-rangement, since it quickly wilts, fades, or browns. That is why it is important to develop agents for conditioning cut the florist greens that would extend its vase life effectively and inhibit senescence. Here we report on the effect of growth regulators and commercially available conditioning products on the post-harvest longevity of cut stems of Weigela flor-ida 'Variegata Nana ' and certain processes associated with their senescence. Senescence of W. florida cut stems resulted in reduced post-harvest quality, decrease in relative water content (RWC) and an increase in electrolyte leakage (EL) in the leaf tissues. Chrysal Clear 2, applied in the form of a 24-hour pre-treatment, was the most effective in extend-ing the longevity of cut stems of W. florida. The same conditioning product also had a beneficial effect on leaf tissue water content and the values of the chlorophyll fluores-cence parameters, including maximum quantum yield and actual photochemical activity. Conditioning of W. florida stems in a solution of gibberellic acid at a concentration of 0.25 mg · dm-3 had the most beneficial effect on the cytoplasmatic membranes. However, the highest contentes of photosynthetic pigments (chlorophyll “a ” and “b”), were found after the 24-hour pre-treatment of W. florida stems in a solution of 0.1 mmol · dm-3 benzy-ladenine and Chrysal Clear 2. Key words: EL, fluorescence, photosynthetic pigments, growth regulators, RWC, senes-
Institution: University of Life Sciences in Lublin
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: diamond
OpenAlex ID: W2061246508