บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Inhibition of biodeterioration of yam tuber Dioscorea rotundata Poir in storage with phenolic extract of Acalypha hispida Burm.f. leaves.

Ejechi, B. O.; Souzey, J. A.;

Journal of Stored Products Research Year: 1999 Vol: 35 Issue: 2 Pages: 127-134 Ref: 14 ref.

1999

บทคัดย่อ

Inhibition of biodeterioration of yam tuber Dioscorea rotundata Poir in storage with phenolic extract of Acalypha hispida Burm.f. leaves.

 

The effect of an aqueous crude leaf extract and an extract of leaf phenolic acids of Acalypha hispida on biodeterioration of yam (Dioscorea rotundata) inoculated with spores or sclerotia of Sclerotium rolfsii [Corticium rolfsii], Penicillium sp., Fusarium sp., Rhizopus sp. and Aspergillus niger, was investigated. The fungi were susceptible to the extracts with a minimum inhibitory concentration (MIC) range of 5.0-16.5 mg/ml. The phenolic acids extract was more inhibitory than the aqueous crude extract. The extracts inhibited the activity of amylase in culture filtrates of A. niger, as well as degradation of peeled yam by the test fungi. Biodeterioration of inoculated and uninoculated freshly harvested yam tubers stored for 8 months was reduced by 52-66% following treatment with the extracts while in uninoculated tubers, purchased from the open market, biodeterioration was reduced by 16%. Exposure of the open market yams to mild heat (100 deg C for 60 s) before extract-treatment, reduced biodeter

ioration by 38% after 8 months storage.