Effects of Essential Oil Vapour Treatment on the Postharvest Disease Control and Different Defence Responses in Two Mango (<Emphasis Type="Italic">Mangifera indica</Emphasis> L.) Cultivars |
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| Authors: | Anand Babu Perumal Periyar Selvam Sellamuthu Reshma B Nambiar Emmanuel Rotimi Sadiku |
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| Affiliation: | 1.Department of Food Process Engineering, School of Bioengineering,SRM University,Chennai,India;2.Department of Chemical, Metallurgical and Materials Engineering,Tshwane University of Technology,Lynnwood Ridge,South Africa |
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| Abstract: | The purpose of this study was to investigate the inhibitory effect of essential oils (thyme, clove and cinnamon) in vapour phase against the major fungal diseases of mango in vitro and in vivo. Thyme oil vapour (5 μL/Petri plate) completely inhibited the mycelial growth of Colletotrichum gloeosporioides and Lasiodiplodia theobromae under in vitro condition. Thyme oil vapour at 66.7 μL L?1 significantly reduced artificially inoculated C. gloeosporioides and L. theobromae in mangoes for 4 days. GC/MS analysis revealed thymol, eugenol and benzofuran, 3-methyl as the dominant compounds in thyme, clove and cinnamon oils, respectively. The activities of defence and antioxidant enzymes including peroxidase, chitinase, phenylalanine ammonia-lyase, β-1,3-glucanase, catalase and superoxide dismutase were enhanced by thyme oil (66.7 μL L?1) treatment and also help to maintain the phenolic content. Hence, postharvest thyme oil vapour treatment may prove to be an alternative means of controlling disease in mangoes. |
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