บทคัดย่องานวิจัย

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Regulation of aflatoxin production by naphthoquinones of walnut (Juglans regia).

MAHONEY. N., MOLYNEUX, R.J. and CAMPBELL, B.C.

Journal of Agricultural and Food Chemistry 48: 4418-4421.

2000

บทคัดย่อ

Regulation of aflatoxin production by naphthoquinones of walnut (Juglans regia).

The effects of four naphthoquinones which occur in walnut husks on fungal viability and aflatoxigenesis was studied. The quinones delayed germination of the fungus and completely inhibited growth at higher concentrations. Their effect on aflatoxin levels was highly dependent on the concentration of individual naphthoquinones in the media. At higher concentrations, aflatoxin production was decreased or completely inhibited, but at lower concentrations there was a stimulatory effect on aflatoxin biosynthesis. Structural features of the naphthoquinones associated with decreased fungal viability and greatest effect on aflatoxigenesis were the presence of a 5-hydroxyl or 2-methyl substituent, but there was no significant additive effect when both of these substiuents were present.