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KMID : 0379119960240030167
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Korean Journal of Mycology
1996 Volume.24 No. 3 p.167 ~ p.175
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Effect of light on fruit body primordium formation of Ganoderma lucidum of nutrient agar medium
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서건식/Seo, Geon Sik
유승헌/미곡호/갑원계개/Yu, Seung Hun/Otani, Hiroshi/Kohmoto, Keisuke
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Abstract
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The objective of this research was to determine the effect of light quality on formation of fruit body primordia (FBPs) of Ganoderma lucidum. To achieve this 5 isolates of the fungus that develops fruit body primordia on nutrient agar media were incubated with or without continuous irradiation. The fluorescent lamps used different colors such as black light blue (BLB), pure blue (P-B), pure green (P-G), pure yellow (P-Y) and pure red (P-R). Effect of periodic light and dark exposures on FBP formation of isolate G1-009 was investigated. The FBP formation in G. lucidum isolates was also tested under monochromatic light produced by the combination of interference filters and colored glass filters. Three isolates produced FBPs under all kinds of fluorescent lamps, whereas two induced FBPs only under visible light except for BLB fluorescent lamp. However, these isolate did not form FBPs in the dark. The FBP was formed at light intensity from 0.05 to 10.0 μmol m^(-2) s^(-1), and begun to reduce its number as light intensity increase over 0.5 μmol m^(-2) s^(-1). When the isolate was incubated under periodic light and dark exposures, the number and weight of FBP increased as compared with those under continuous light. Initiation of FBP requires at least 4 days of light illumination. Although isolate GI-003 produced FBPs in a wide range of 400 to 800 ㎚, other four isolates had two effective regions 400 to 500 ㎚ and 700 to 750 ㎚ in FBP formation.
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