Propagation of Ornamental Plants
10(1): 3-8, 2010
THE EFFECT OF LIGHT SPECTRUM ON THE GROWTH CHARACTERISTICS OF IN VITRO CULTURES OF PHALAENOPSIS
Hsing-Cheng Hsu1 and Chiachung Chen2*
1Department of Bio-industrial Mechatronics Engineering, National ChungHsing University, 250 Kuokuang Road, Taichung, Taiwan 2Department of Bio-industrial Mechatronics Engineering, National ChungHsing University, 250 Kuokuang Road, Taichung, Taiwan, *Fax: + 886-4-22857135, *E-mail: ccchen@dragon.nchu.edu.tw
Abstract
The effect of light spectrum on the growth characteristics of in vitro cultures of Phalaenopsis was studied. The experiment design included three different light sources, namely white (control), blue and red light. The growth characteristics of the plantlets were selected as a dependent variable to establish a nonlinear growth model. The results showed the fresh weight, dry weight, and total leaf area increased with following the red light treatment. However, the red light reduced the chlorophyll index of Phalaenopsis leaves. There was no statistical difference in the root length among the different light spectrum treatments.
Key words: growth model, in vitro culture, light spectrum, Phalaenopsis
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