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Incidence and mycotoxin production byAlternaria tenuisin decayed apples

İnmaculada Viñas, José Antonio Bonet, Vicente Sanchís

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Abstract

Alternaria tenuis was the main species of Alternaria which produced post‐harvest decay in apples. Alternariol (AOH) and alternariol monomethyl ether (AME) were the major mycotoxins produced in Alternaria‐decayed apples at 25°C and 2°C. Only the strain Alternaria tenuis CMTA 65 at 25°C produced tenuazonic acid (TA). Altertoxin‐I (ATX‐I) and altertoxin‐II (ATX‐II) were not detected in any of the apple samples. A large percentage of strains of A. tenuis studied produced TA (97%) and AT‐I (82·3%) when grown in a yeast extract sucrose medium (YES) at 25°C. A much smaller percentage of strains produced AOH and AME and none were found to produce detectable levels of ATX‐II.

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What this paper is about

Alternaria tenuis was the main species of Alternaria which produced post‐harvest decay in apples. Alternariol (AOH) and alternariol monomethyl ether (AME) were the major mycotoxins produced in Alternaria‐decayed apples at 25°C and 2°C. Only the strain Alternaria tenuis CMTA 65 at 25°C produced tenuazonic acid (TA). Altertoxin‐I (ATX‐I) and altertoxin‐II (ATX‐II) were not detected in any of the apple samples. A large percentage of strains of A. tenuis studied produced TA (97%) and AT‐I (82·3%) when grown in a yeast extract sucrose medium (YES) at 25°C. A much smaller percentage of strains produced AOH and AME and none were found to produce detectable levels of ATX‐II.

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Available abstract

Alternaria tenuis was the main species of Alternaria which produced post‐harvest decay in apples. Alternariol (AOH) and alternariol monomethyl ether (AME) were the major mycotoxins produced in Alternaria‐decayed apples at 25°C and 2°C. Only the strain Alternaria tenuis CMTA 65 at 25°C produced tenuazonic acid (TA). Altertoxin‐I (ATX‐I) and altertoxin‐II (ATX‐II) were not detected in any of the apple samples. A large percentage of strains of A. tenuis studied produced TA (97%) and AT‐I (82·3%) when grown in a yeast extract sucrose medium (YES) at 25°C. A much smaller percentage of strains produced AOH and AME and none were found to produce detectable levels of ATX‐II.

Key concepts: Alternaria, Mycotoxin, Incidence (geometry), Biology, Horticulture, Library science, Botany, Mathematics

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