The influence of giberellic acid on callas grown in pots

Abstract

This paper presents four Zantedeschia cultivars ('Cameo', 'Black Star', 'Picasso', 'Black Eyed Beauty') grown in pots, to which determinations and observations were made on the effect of treatment with gibberellins. Treatments were applied to the tubers, before planting, with 250 ppm GA3 solution. The results revealed that treatment with GA3 had different impact on the studied cultivars: at the cv. 'Cameo' the emergence of floral stem was delayed, the growing season was shortened and the length of floriferous stems was shorter; at the cv. 'Picasso' they shortened the vegetation period and increased the number of flowers / plant; at the cv. 'Black Star' they led to early flowering, shortening the growing season and increasing the number of flowers / plant; at the cv. 'Black Eyed Beauty' they caused earlier flowering and shorten the length of the flower stems.