Submitted to: American Society for Horticultural Science Abstracts 2000
Publication Type: Abstract Only
Publication Acceptance Date: July 26, 2000
Publication Date: N/A
Technical Abstract: An inexpensive ultrasonic fogging system is presented which aids in the establishment of tissue culture shoots in soil under greenhouse conditions. In addition, ultrasonic fogging may be coupled to CO2 nutrient enhancement via bubbling CO2 into the water reservoirs prior to fogging to improve growth and morphogenesis responses of shoots. A list and cost of items for rthe system and their assembly are given. Transplanted tissue culture shoots of basil (Ocimum basilicum L.), Hosta (Hosta sp.), mint (Mentha sp.), and thyme (Thymus vulgaris L.) were tested with this fogging system with and without CO2 nutrient elevation and compared to the growth of shoots grown under a misting system with and without CO2 nutrient elevation. In all cases, ultrasonic fogging enhanced survival rates, growth (fresh weights), and morphogenesis (axially shoots, leaves, and roots) versus that occurring in the misting system. For example, thyme and dmint shoots exhibited 2 and 5 x-fold increases, respectively, in fresh weights under ultrasonic fogging with CO2 compared to misting systems with CO2. Associated with enhanced survival and morphogenesis was an overall enhancement of shoot and leaf size and overall maturation responses. This is also reflected in enhanced secondary products obtained from shoots grown under ultrasonic fogging compared to shoots grown in misting systems.