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Bipolar Heterothallism, a Principal Mating System of Cordyceps militaris In Vitro  

Shrestha Bhushan (Department of Applied Biology, Kangwon National University)
Kim Ho Kyung (Mushtech Co. Ltd)
Sung Gi Ho (Department of Botany and Plant Pathology, Oregon State University)
Spatafora Joseph W. (Department of Botany and Plant Pathology, Oregon State University)
Sung Jae Mo (Department of Applied Biology, Kangwon National University)
Publication Information
Biotechnology and Bioprocess Engineering:BBE / v.9, no.6, 2004 , pp. 440-446 More about this Journal
Abstract
Interest in in vitro study of entomopathogenic fungi, including Cordyceps species, has been increasing due to their valuable bioactive compounds and biocontrol effects. Among Cordyceps species, in vitro stromata of C militaris has been successfully produced and cultivated for industrial purposes. However, genetic study on in vitro stromata formation of C militaris has not been carried out yet. Here, relationship between mating system and perithecial stromata formation of C militaris is reported. Mating system was determined by observing perithecial stromata formation from mono-ascospore cultures and their pair-wise combinations. Certain combinations of mono-ascospore strains produced perithecial club-shaped stromata, whereas other combinations produced either no stromata or only abnormal non-perithecial stromata. Similarly, mono­ascospore cultures without combination produced either no stromata or only abnormal non­perithecial stromata. Despite obvious heterothallism, self-fertility was occasionally observed in few strains of C militaris. These observations indicated that C militaris behaves as a bipolar het­erothallic fungus and requires two mating compatible strains in order to produce regular club­shaped perithecial stromata, a fundamental requirement for its industrial cultivation.
Keywords
artificial fruiting; bipolar heterothallism; hermaphroditic nature; mating system; self-fertility;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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