Botany-Conference Papers

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  • Item
    Open Access
    Effect of leaf extract of Lantana camara with Maize-based coating on the quality of fresh-cut fruits of Ananas comosus and Musa acuminata
    (Taylor& Francis, 2021) Adekunle, A.A.; Adeogun, O.; Olorunsuyi, Y.J.
    Fresh-cut fruits of Ananas comosus (pineapple) and Musa acuminata (banana) have a relatively short shelf-life hence the need to enhance their quality. Preservation effect of ethanolic extract of leaf of Lantana camara (10%w/v) incor- porated with maize-based edible coating on fresh-cut fruits of banana and pine- apple were determined. To achieve the objective of this study, the pH, total carotenoid content, ascorbic acid, total phenolic content, fungal load, antioxidant activity, total soluble solids, and browning potential of coated fruits at ambient temperature (PEC); untreated fruits (NTS), sodium benzoates (BSB) at ambient temperature and a coated sample (PEC@4) at 4°C were analysed at intervals for 15 days. The quantitative phytochemical constituents of the extracts were assayed. The phytochemical analysis of the extract shows high yields of tannins, flavonoids, anthraquinones, and low yields of alkaloids and cardiac glycosides. The quality assessment of the test fresh-cut fruits revealed that there was higher preservation activity in PEC@4 of banana and pineapple, followed by a considerable efficacy of PEC of banana and pineapple
  • Item
    Open Access
    Studies on D10 Values (γ- Irradiation) of Five Postharvest Fungal Pathogens and their Effect on the Biochemical Properties of Fresh capsicum Fruits
    (B.P. International, 2021) Frimpong, K.; Adekunle, A.A.; Ogundipe, T.O.; Okyere, A.A.
    Fungi are increasingly implicated as the agents of spoilage of economically important fruits and vegetables. Five postharvest fungi of pepper fruits namely Aspergillus niger, A. fumigatus Colletotrichum capsici, C. trumcatum and Fusarium solani were tested for their population responses to gamma irradiation. These fungi were irradiated at dose 0.2, 0.4, 0.6 and 0.8KGy at a dose rate of 1.08KGy/hour. Stumbo equation was used in generating D10 values of the organisms. The fungi were inoculated on the pepper fruits for 8 days and their biochemical/physiochemical properties (pH, total ascorbic acid, total titratable acidity and soluble solids) and physiological weight loss were assessed. Complete randomized block design was employed. GenStat 12th edition was used with one- and two- way Anova for D10 values and biochemical parameters respectively. The D10 values ranged from 0.714 to 0.995 KGy with Fusarium solani being the most radio resistant whereas Colletotrichum species were also more susceptible to the lethal effect of gamma irradiation. Generally, fungi inoculated pepper fruits had higher biochemical values compared to the control samples. Gamma irradiation decontaminated fresh pepper fruits of their bioburden thereby extending their postharvest life since these fungi when present are either pathogenic or saprophytic to the pepper fruits. Deteriorating activities of fungi also have adverse effect on the physiochemical properties of pepper fruits.