Journal
LEBENSMITTEL-WISSENSCHAFT UND-TECHNOLOGIE-FOOD SCIENCE AND TECHNOLOGY
Volume 34, Issue 7, Pages 430-436Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/fstl.2001.0758
Keywords
Bacillus subtilis; control; litchi; postharvest; rot
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The litchi (Litchi chinensis Sonn.) fruit are extremely susceptible to postharvest moulds. The main pathogen of litchi,fruit was isolated anti identified as Peronophythora litchi. Of antagonists tested, Bacillus subtilis it-as the most effective against Peronophythora litchi. The relative antifungal activity of Bacillus subtilis reached a maximum after 48 h culture, and then decreased gradually. Purification of the crude extract of Bacillus subtilis folowed by Sepharose Toyopearl HW-50 gel, filtration confirmed that the antifungal compound of Bacillus subtilis had a molecular weight of about 1.2 kD. Both the antagonist and its extract were effective in controlling artificially wound-inoculated fruit pathogens, but the use of the extract had better effect than that of the antagonist. Furthermore, application of the extract of Bacillus subtilis exhibited good control of decay fbr a storage period of 30 days at 5 degreesC and quality maintenance of litchi fruit in terms of eating scores and contents of total soluble solids. titratable acidity anti ascorbic acid. No off-flavor of the treated,fruit was tasted.
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