Hasan H A
Botany Department, Faculty of Science, Assiut University, Egypt.
Acta Microbiol Immunol Hung. 1996;43(2-3):125-33.
Alternaria represents the most colon decay organism of the post-harvest tomato fruit. The prevalent type of decay, black rot lesion, is caused by Alternaria alternata which may invade tomato tissue damaged by sun scald. The mainly natural mycotoxins produced in rotted tomato are alternariol (AOH), alternariol monomethyl ether (AME), and tenuazonic acid (TA). Whereas, altertoxin-I and -II (AT-I and -II), in addition to AOH, AME and TA were produced by local A. alternata in a synthetic medium. The optimum temperature for toxin production by A. alternata IMI 89344 was 28 degrees C for AOH and AME, 21 degrees C for TA and 14 degrees C for AT-I and -II. The growth and toxin were produced in a noticeable amount at 7 degrees C but drop at 35 degrees C. Significant inhibition in these toxins was attained at 500 ppm cinnamon oil in YES-Czapek's medium and in homogenate of tomato.
链格孢是采后番茄果实中最常见的致腐微生物。常见的腐烂类型，即黑腐病斑，是由链格孢引起的，它可能会侵入因日灼而受损的番茄组织。腐烂番茄中主要产生的天然霉菌毒素是交链孢酚（AOH）、交链孢酚单甲醚（AME）和细交链孢菌酮酸（TA）。然而，除了AOH、AME和TA之外，链格孢毒素-I和-II（AT-I和-II）是由当地的链格孢在合成培养基中产生的。链格孢IMI 89344产生毒素的最适温度，对于AOH和AME是28℃，对于TA是21℃，对于AT-I和-II是14℃。在7℃时生长和毒素大量产生，但在35℃时下降。在YES-查氏培养基和番茄匀浆中，500 ppm肉桂油对这些毒素有显著抑制作用。
