The role of benzyl amino purine and kinetin in enhancing the growth and flowering of three gaillardia varieties

الملخص EN

Two pot experiments were carried out during two successive winter seasons of 2015/2016 and 2016/2017 in a private
commercial nursery located at Damanhour City, El-Beheira Governorate, Egypt.

The objective of this research was to
evaluate the effect of two synthetic cytokinins: benzyl amino purine (BAP) at 50 and 100 ppm and 6-furfuryl-aminopurine
(kinetin) at 25 and 50 ppm, each alone, on the growth performance, yield and quality of three varieties (pulchella, Mesa
Yellow and Lorenziana) of gaillardia (Gaillardia pulchella).

The experiment was designed as a split-plot design
containing three replicates.

The obtained results of the two seasons, generally, revealed that Gaillardia pulchella var.

pulchella had the highest plant and flowering growth parameters, (viz.

number of inflorescence per plant and flowering
duration).

While, Lorenziana variety showed the best diameter, longevity, fresh weight and dry weight of inflorescence
per plant.

Spraying gaillardia plants with BAP and kinetin significantly enhanced vegetative, root and flowering
parameters compared to the control treatment.

From that, BAP at 100 ppm or kinetin at 25 ppm recorded the highest mean
values of the most recorded data and might be considered as optimal treatment for the production of high yield and quality
of gaillardia plants under the environmental conditions of El-Beheira Governorate and other similar regions.