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Antibiosis of Streptomyces griseus Against Colletotrichum lindemuthianum
Author(s) -
Tu J. C.
Publication year - 1988
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1988.tb00960.x
Subject(s) - colletotrichum lindemuthianum , streptomyces griseus , hypha , biology , appressorium , microbiology and biotechnology , botany , conidium , phaseolus , streptomyces , bacteria , genetics
Streptomyces griseus produces an antibiotic substance against Colletotrichum lindemuthianum because, in dual culture on potato dextrose agar (PDA), a large inhibitory zone was formed between the colonies of S. griseus and C.lindemuthianum . When S. griseus was placed adjacent to a colony of C. lindemuthianum in PDA, S.griseus grew poorly in PDA but it thrived and sporulated profusely when it came in contact with a colony of C. lindemuthianum indicating that S.griseus might require some essential nutrients from C.lindemuthianum . Scanning electron microscopy showed that hyphae of S.griseus in contact with C.lindemuthianum produced appressorium‐like swellings or simply grew on the hyphal surface of C.lindemuthianum . Internal parasitism was evidenced by the presence of hyphae and conidia of the mycoparasite inside the host hyphae. Internal parasitism resulted in formation of several blebs. Cell walls of the parasitized hyphae degenerated having a sponge‐like texture. The blebs broke off and left rounded holes on the hyphae.