THE INFLUENCE OF TEMPERATURE ON THE GERMINATION OF SEED OF A COMMERCIAL VERBENA HYBRID

The influence of temperature on Verbena. x hybrida Voss seed germination was evaluated, in terms of current germination recommendations to overcome erratic and low germination.
During three experiments, non-dormant seeds were exposed to continuous constant temperatures and alternating diurnal temperatures.
Seeds were germinated on germination paper inside clear petri dishes, using dark temperature-controlled incubators.

No germination occurred at constant 10°C. Significantly (P≤0,05) reduced germination occurred at constant 15°C and at irregular fluctuating temperatures, while 25°C was assumed as a cardinal constant temperature.
Controlled fluctuations did not significantly reduce germination.

V. x hybrida seed should be germinated at any alternating diurnal temperature regime with a constant amplitude, between 28°C day and 14°C night temperatures.

XXV International Horticultural Congress, Part 5: Culture Techniques with Special Emphasis on Environmental Implications Chemical, Physical and Biological Means of Regulating Crop Growth in Ornamentals and Other Crops

P.J. Jansen van Vuuren, A.C. Lubbe

Verbena x hybrida, germination percentage, cardinal temperature

https://doi.org/10.17660/ActaHortic.2000.515.23