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Acquired resistance of Alternaria solani and Sclerotium rolfsii to Polyoxin‐D
Author(s) -
Maria Rose,
Sullia S. B.
Publication year - 1986
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.1439-0434.1986.tb00894.x
Subject(s) - sclerotium , alternaria solani , biology , fungicide , fusarium solani , horticulture , botrytis cinerea , mycelium , alternaria , microbiology and biotechnology , botany
Acquired resistance to the antibiotic polyoxin‐D was studied in two phytopathogenic fungi, Alternaria solani Sorauer, and Sclerotium rolfsii Sacc. The ED 50 value of the antibiotic for A. solani was 100 μg/ml and S., rolfsii 200 μg/ml. A. solani and S. rolfsii could be trained to tolerate concentrations upto 1.000 μg/ml and 2.200 μg/ml respectively. The acquired resistance in both cases was not lost on continued subculturing in fungicide‐free, media. On transfer to fungicide‐free media, Polyoxinresistant strains of both the fungi showed faster growth rate and appreciable reduction in sporulation compared to the original strains. The adapted strain of A. solani showed cross‐resistance to Cycloheximide and Difolatan but not to Hinosan and Bayleton.