Song Hyuk-Hwan, Lee Hee-Seok, Jeong Jin-Ho, Park Hee-Seung, Lee Chan
Department of Food Science and Technology, BET Research Institute, Chung-Ang University, Ansung, 456-756, Korea.
Int J Food Microbiol. 2008 Mar 20;122(3):296-301. doi: 10.1016/j.ijfoodmicro.2008.01.009. Epub 2008 Jan 26.
Beauvericins and enniatins are cyclohexadepsipeptide mycotoxins that exhibit phytotoxicity and insecticidal activities. In the present study, the production of beauvericin and newly found enniatins (H, I, and MK1688) was characterized in 28 Fusarium strains isolated from potato samples in Korea. The predominant Fusarium species in potato was F. oxysporum (53.6%). Fifteen strains of F. oxysporum and two strains of other Fusarium species produced beauvericin (at concentrations from 3.1 to 743.2 microg/g) in culture on rice. Enniatins H and I were produced by 3 and 11 strains at concentrations from 33.1 to 781.3 microg/g and from 6.5 to 730.3 microg/g, respectively. Five isolates produced enniatin MK1688 at concentrations from 4.6 to 432.6 microg/g. In particular, one isolate (No. 1501) identified as F. oxysporum and two other Fusarium strains (Nos. 804 and 910) produced all of the tested toxins. These results indicate that enniatins H, I, and MK1688 and beauvericin are produced by Fusarium isolates occurring on potato. We do not know if the toxins can accumulate in the environment since it was not demonstrated.
白僵菌素和恩镰孢菌素是具有植物毒性和杀虫活性的环六肽霉菌毒素。在本研究中，对从韩国马铃薯样品中分离出的28株镰刀菌菌株中白僵菌素和新发现的恩镰孢菌素（H、I和MK1688）的产生情况进行了表征。马铃薯中主要的镰刀菌种类是尖孢镰刀菌（53.6%）。15株尖孢镰刀菌和2株其他镰刀菌在大米培养基上培养时产生了白僵菌素（浓度为3.1至743.2微克/克）。恩镰孢菌素H由3株菌株产生，浓度为33.1至781.3微克/克；恩镰孢菌素I由11株菌株产生，浓度为6.5至730.3微克/克。5株分离株产生了恩镰孢菌素MK1688，浓度为4.6至432.6微克/克。特别是，一株被鉴定为尖孢镰刀菌的分离株（编号1501）和另外两株镰刀菌菌株（编号804和910）产生了所有测试毒素。这些结果表明，恩镰孢菌素H、I和MK1688以及白僵菌素是由马铃薯上出现的镰刀菌分离株产生的。由于未得到证实，我们不知道这些毒素是否会在环境中积累。
