Abstract
Different leaf extracts of Garlic creeper (Adenocalymma alliaceum Miers.) using water and solvents were prepared and they were screened for their antifungal activity against Colletotricum gloeosporioides Penz. and Botryodiplodia theobromae Pat. causal agents of mango post harvest diseases viz., anthracnose and stem end rot respectively. Among the extracts tested, chloroform extract was found to be highly effective in inhibiting the spore germination of C. gloeosporioides by 84.62% and B. theobromae by 84.50% followed by methanol extract. The extracts were also inhibitory to the mycelium. Ammonium sulphate precipitation and SDS–PAGE analysis of the extract indicated the presence of a major protein with a molecular weight at 65 kDa. Two blue spots at Rf 0.96 and 0.80 was also observed in TLC analysis and the presence of tannic acid, resorcinol was evident from HPLC analysis. Treatment of fruits with leaf extract of A. alliaceum increased the activities of peroxidase, polyphenol oxidase, phenylalanine ammonia-lyase and sugars with significant reduction in starch, phenolics, protein and ascorbic acid. The extract was partially purified and formulated as ADENOCAL 60 EC for the management of post harvest diseases of mango fruits.
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