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KMID : 0880220110490010071
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Journal of Microbiology
2011 Volume.49 No. 1 p.71 ~ p.77
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Effect of light and reductones on differentiation of Pleurotus ostreatus
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Lee Seung-Rock
Kim In-young
Chay Kee-Oh
Joo Woo-Jeong
Baek Yong-Un
Cho Seung-Hyun
Kang Sa-Ouk
Lee Seung-Jae
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Abstract
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Vegetative mycelia of Pleurotus ostreatus were differentiated into primordia and subsequently into fruit bodies in synthetic sucrose-asparagine medium when exposed to light at low temperature. During photo-morphogenesis, l-ascorbic acid-like substances called reductones were produced. l-Ascorbic acid, d-eryth-roascorbic acid, 5-O-(α-d-glucopyranosyl)-d-erythroascorbic acid, 5-O-(α-d-xylopyranosyl)-d-erythroascorbic acid, 5-methyl-5-O-(α-d-glucopyranosyl)-d-erythroascorbic acid and 5-methyl-5-O-(α-d-xylopyranosyl)-d-eryth-roascorbic acid were accumulated initially in the illuminated mycelia before the initiation of fruiting. The content of glycosides of erythroascorbic acid and their methylated compounds increased again in the primordia and the fruit bodies. Exogenous L-ascorbic acid induced the formation of primordia from the mycelia in the dark in a dose-dependent manner. Thus, this suggests that these reductones might play a role in mediating the light stimulus in photomorphogenesis.
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KEYWORD
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reductone, light, ascorbate oxidase, photomorphogenesis, Pleurotus ostreatus
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