บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Ergosterol accumulation and oil quality changes in stored soybean invaded by Aspergillus ruber (A. glaucus group).

Dhingra, O. D.; Jham, G.; Napoleao, I. T.;

Mycopathologia Year: 1998 Vol: 143 Issue: 2 Pages: 85-91 Ref: 34 ref.

1998

บทคัดย่อ

Ergosterol accumulation and oil quality changes in stored soybean invaded by Aspergillus ruber (A. glaucus group).

Soyabean (cv. UFV-10) seed samples inoculated with spores of A. ruber were stored for 20 to 140 days at 25 plus or minus 1 deg C with moisture content varying from 11.3 to 17.7%. Seeds were colonized by the fungus within 20 days at all moisture levels. Ergosterol concentration in seeds increased with time of storage, being slow in samples with moisture content of 11.3% to 13.1% and more rapid in those with higher moisture content. Free fatty acid (FFA) content also increased following a similar pattern to ergosterol. Equations were used to predict minimum safe storage periods of the seeds at 25 deg C. The rise in FFA was due to an increase of A. ruber mass within the seed. Fungal growth did not affect fatty acid profiles or iodine index of the extracted oil. The results suggest revision of the present recommendations regarding seed moisture during storage. The FFA concentration of a seed lot can be used as a sensitive indicator of seed deterioration due to storage fungi.