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Crown rot fungi of Nigerian bananas cv. Robusta and the effects of benomyl on their exo‐enzymes
Author(s) -
Ogundero V. W.
Publication year - 1987
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.3620270107
Subject(s) - benomyl , fusarium solani , cellulase , biology , amylase , fusarium oxysporum , esterase , fusarium , horticulture , botany , fungicide , incubation , pectin , enzyme , biochemistry
Eight species of fungi were consistently obtained from crown rots of Nigerian bananas cv. Robusta. The predominant species were Botryodiplodia theobromae PAT. and Colletotrichum musae (BERK. & CURT) VON ARX. Others include: Ceratocystis paradoxa (DADE) C. MOREAU, Fusarium solani (MART.) SACC., Fusarium roseum SAYD. & HANS, Fusarium moliniformae SHELDON, Fusarium oxysporum SCHLECHT and Verticillum theobromae (TURC.) MASON & HUGHES. Growth‐temperature relations showed that B. theobromae and C. musae grew best at 30 °C within the 8‐day incubation period. Both fungal species produced extracellularly, amylases, pectin (methyl) esterase and CM‐cellulases. The synthesis of these enzymes was completely inhibited by the presence of the fungicide benomyl at concentrations of 200 ppm and above in the growth medium. At lower concentrations (50–150 ppm), pectin esterase and CM‐cellulase production was also suppressed while amylases were produced in measurable amounts.