Jae-Eun Kim

Publication Date


Advisor(s) - Committee Chair

James Martin, Ray Johnson, James Worthington


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Degree Program

Department of Agriculture

Degree Type

Master of Science


The effect of seed chilling and light treatment on the germination of Ornamental Cabbage (Brassica oleracea var. capitata) and Flowering Kale (Brassica oleracea var. acephala) is not clearly understood. Ornamental cabbage seeds are generally recommended to be chilled prior to sowing and given light after sowing for good germination. Flowering kale requires neither chilling nor light to germinate. Four cultivars of ornamental cabbage and eight cultivars of flowering kale were subjected various treatments. There were two types of treatments, chilling before sowing and photo treatment after sowing. The germination rate was established for each treatment. The germination rate was greater in the dark treatment for both ornamental cabbages and flowering kales. Under the dark treatment, there was a significant difference for chilling treatments for both ornamental cabbage or flowering kale. The control at room temperature had higher germination rates for ornamental cabbage. For flowering kale, those chilled at -18°C had significant difference for germination percentage. Under the light treatment, the seeds chilled at 6°C had a better germination rate than the control for both the ornamental cabbage and flowering kale and had a higher germination rate than seeds chilled at -18°C for ornamental cabbage. Both ornamental cabbage and flowering kale germinated earlier under the dark treatment than under the light treatment. In ornamental cabbage, there was no significant difference among cultivars. However, in flowering kale, there was a significant difference among cultivars. Temperature treatment and photo treatment interacted in the ornamental cabbage but not in the flowering kale. Temperature treatment and photo treatment act independently of each other in flowering kale, but those treatments do not act independently in the ornamental cabbage.


Agriculture | Agronomy and Crop Sciences | Botany | Life Sciences | Plant Sciences