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For African violets, 'hands off' means healthier
Date:11/3/2009

STILLWATER, OKAfrican violets have a mixed reputation. Their delicate, colorful flowers and furry, soft leaves make them a favorite among home gardeners and growers. But the striking plants are often regarded as temperamental: a precise recipe of light, moisture, warm temperatures, high humidity, and fertilizer is required to encourage african violets to grow and flower.

A recently published study by scientists Julia C. Brotton and Janet C. Cole from the Department of Horticulture and Landscape Architecture at Oklahoma State University (in a recent issue of HortTechnology) could provide african violet enthusiasts with important care information about the finicky flower.

Because of their brightly colored flowers and hairy leaves, people are attracted to african violets and often want to touch the leaves and flowers. But how does all this attention affect the plants? The research team set out to determine the effect of "brushing" african violet leaves on plant growth and quality. Cole explained, "Because (african violet) growers work in conditions that can contribute to the development of dry, irritated skin, many growers use body lotions to help soothe and moisturize their dry skin. Many consumers also use these products. Our study researched whether touching or "brushing" african violet leaves causes damage, particularly when body lotion or other skin care products have been applied to hands before touching the plants."

Although previous studies have investigated the effect of various methods of mechanical conditioning, including brushing, on the growth and quality of vegetable and bedding plants, this was the first reported study of the results of plant response to tactile mechanical stress, or "thigmomorphogenesis" on african violets.

Plants of two cultivars of african violet (Saintpaulia ionantha), 'Michigan' and 'Gisela', received five brushing treatments during the study: no brushing, brushed for 30 sec
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Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

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