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KMID : 0903619980390050625
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Journal of the Korean Society for Horticultural Science
1998 Volume.39 No. 5 p.625 ~ p.628
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Air Temperature and Relative Humidity Affect the Growth of Chrysanthemum Plantlets in the Microponic System
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이용범/Lee, Yong Beom
조영렬/한은주/Cho, Young Ryul/Hahn, Eun Joo
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Abstract
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Increased production efficiency of disease-free chrysanthemum (Dendranthema grandiflorum ´Bongwhang´) plantlets can be achieved by reducing the occurrence of in vitro variants such as vitrified plantlets and simplifying the culture process in microponic system. In this study, optimum air-temperature and humidity were determined first to establish the microponic system that combines in vitro culture with hydroponic culture. Chrysanthemum plantlets grown at 25℃ showed highest photosynthetic rate and growth rates (i.e., shoot length, leaf number, leaf length, leaf width and fresh and dry weight). In case of plantlets grown at 30℃ showed the earliest leaf appearance and leaf expansion but the leaves appeared thin and weak. Plantlets grown under RH 70±5% showed highest photosynthetic rate and growth rates (i.e., shoot length, leaf number, leaf length, leaf width and fresh and dry weight). No difference in dry weight and photosynthesis were observed between the plantlets grown under RH 35±5% and 90±5%.
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