{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T23:04:49Z","timestamp":1762297489899},"reference-count":28,"publisher":"Canadian Science Publishing","issue":"7","license":[{"start":{"date-parts":[[2009,7,1]],"date-time":"2009-07-01T00:00:00Z","timestamp":1246406400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Can. J. Microbiol."],"published-print":{"date-parts":[[2009,7]]},"abstract":"<jats:p> Mycosphaerella fijiensis causes black leaf streak disease in banana and plantain. This fungus is usually attacked by reactive oxygen species secreted by the plant or during exposure to fungicide, however, little is known about the antioxidant response of the fungus. In this study, mycelia were observed to totally decompose 30\u00a0mmol\/L of hydrogen peroxide (H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>) within 120\u00a0min, liberating oxygen bubbles, and also to survive in concentrations as high as 100\u00a0mmol\/L H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>. The oxidative stress responses to H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>, paraquat, and hydroquinone were characterized in terms of the activities of catalase and superoxide dismutase (SOD). Two active catalase bands were seen in native PAGE induced by H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub>. Band I had monofunctional activity and band II had bifunctional catalase\u2013peroxidase activity. Two isozymes of SOD, distinguishable by their cyanide sensitivity, were found; CuZnSOD was the main one. The combination of H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> and 3-aminotriazole reduced the accumulation of biomass up to 40% compared with exposure to H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> alone, suggesting that catalase is important for the rapid decomposition of H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> and has a direct bearing on cell viability. The results also suggest that the superoxide anion formed through the redox of paraquat and hydroquinone has a greater effect than H<jats:sub>2<\/jats:sub>O<jats:sub>2<\/jats:sub> on the cellular viability of M. fijiensis. <\/jats:p>","DOI":"10.1139\/w09-023","type":"journal-article","created":{"date-parts":[[2009,9,18]],"date-time":"2009-09-18T15:59:42Z","timestamp":1253289582000},"page":"887-894","source":"Crossref","is-referenced-by-count":8,"title":["Oxidative stress response of <i>Mycosphaerella fijiensis<\/i>, the causal agent of black leaf streak disease in banana plants, to hydrogen peroxide and paraquat"],"prefix":"10.1139","volume":"55","author":[{"given":"Miguel J.","family":"Beltr\u00e1n-Garc\u00eda","sequence":"first","affiliation":[{"name":"Departamento de Qu\u00edmica ICET, Universidad Aut\u00f3noma de Guadalajara, Patria 1201, Lomas del Valle 44100, Guadalajara, Jalisco, M\u00e9xico."},{"name":"Universidad de Colima, Facultad de Ciencias Biol\u00f3gicas y Agropecuarias, Laboratorio de Biotecnolog\u00eda, km 40 de la Autopista Colima-Manzanillo, Tecom\u00e1n, Colima 28100, M\u00e9xico."},{"name":"Instituto Tecnol\u00f3gico de Tlajomulco Jalisco, Tlajomulco de Z\u00fa\u00f1iga, Jalisco 45640, M\u00e9xico."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gilberto","family":"Manzo-Sanchez","sequence":"additional","affiliation":[{"name":"Departamento de Qu\u00edmica ICET, Universidad Aut\u00f3noma de Guadalajara, Patria 1201, Lomas del Valle 44100, Guadalajara, Jalisco, M\u00e9xico."},{"name":"Universidad de Colima, Facultad de Ciencias Biol\u00f3gicas y Agropecuarias, Laboratorio de Biotecnolog\u00eda, km 40 de la Autopista Colima-Manzanillo, Tecom\u00e1n, Colima 28100, M\u00e9xico."},{"name":"Instituto Tecnol\u00f3gico de Tlajomulco Jalisco, Tlajomulco de Z\u00fa\u00f1iga, Jalisco 45640, 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