Volume 7
Issue 2
Horticulture
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume7/issue2/horticulture/abs-08.html
EFFECT OF GIBBERELLIC ACID ON THE QUALITY OF CUT FLOWERS OF ZANTEDESCHIA ELLIOTTIANA (W. WATS.) ENGL.
Beata Janowska, Marek Jerzy
ABSTRACT
Two experiments were carried out to determine the effect of gibberellic acid on the longevity of cut flowers of two Zantedeschia elliottiana (W. Wats.) Engl. cultivars: 'Black Magic' and 'Florex Gold'. The flowers were conditioned for 2, 4 and 20 hours in water solutions of 8-hydroxyquinoline citrate at concentrations of 200 mg l-1, and then kept in water or gibberellic acid solutions at concentrations of 50 and 100 mg l-1. Gibberellic acid and 8-hydroxyquinoline citrate had different effects on the quality of cut flowers of Zantedeschia elliottiana cultivars: 'Black Magic' and 'Florex Gold'. Gibberellic acid at concentrations of 50 and 100 mg l-1 caused an elongation of peduncles of unconditioned inflorescences in 'Black Magic'. A similar response was observed in unconditioned flowers put in water. In cultivar 'Florex Gold', both concentrations of gibberellic acid caused a lengthening of flower peduncles irrespective of the duration of conditi
Key words: Zantedeschia elliottiana, gibberellic acid, cut flowers, quality..