Effect of plant growth regulators on flower development and quality of five Cyclamen persicum hybrids

Z.M. Alshakhaly, M.M. Qrunfleh
A two-year experiment on five F1 hybrids of Cyclamen persicum Mill., grown in pots, was performed to study effect of foliar spays of several bioregulators on flower development when most of flower scapes were ~1 to 2 cm long. Results of the first year showed that gibberellic acid (GA3) (25, 2×25, 50, 2×50, and 100 ppm) and Promalin (0.75, 1.0, and 1.25 mL L‑1) significantly hastened flower development and increased peduncles length compared to the control. In addition, GA3 (2×25, 50, 2×50, and 100 ppm) resulted in excessive peduncle elongation; and low concentrations of Promalin (0.25 and 0.5 mL L‑1) were ineffective in hastening flower development. Moreover, benzyladenine (BA) (25, 50, 2×50, and 100 ppm) was ineffective in hastening flower development and in increasing peduncles length, while Ethrel (0.5, 1.0, 1.5, 2.0, and 2.5 mL L‑1) delayed flower development, deformed flowers, and enhanced leaf senescence. In the second year, GA3 (5, 10, 25, and 50 ppm; and Promalin (1.25, 2.0, and 3.0 mL L‑1) significantly hastened flower development, increased peduncles length, and increased number of flowers to open at bloom. In addition, Promalin (0.5 mL L‑1) significantly hastened flower development but was ineffective in bringing long peduncles and in increasing number of flowers to open at bloom.
Alshakhaly, Z.M. and Qrunfleh, M.M. (2019). Effect of plant growth regulators on flower development and quality of five Cyclamen persicum hybrids. Acta Hortic. 1263, 215-222
DOI: 10.17660/ActaHortic.2019.1263.27
https://doi.org/10.17660/ActaHortic.2019.1263.27
gibberellic acid, promalin, benzyladenin, ethrel, geophyte, bulb, greenhouse production
English

Acta Horticulturae