Determination of the nutrient composition and associated fungi of malus domestica sold in port harcourt metropolis
Chuku EC, Emiri UN
Studies on the assessment of the nutrient composition and associated fungi of Malus domestica were carried out in the Department of Plant Science and Biotechnolgy laboratory, Rivers State University. Proximate parameters assessed were moisture, ash, fibre, lipid, carbohydrate and protein. Increased values for fibre, carbohydrate and protein were seen in the healthy samples while moisture, ash and lipid were higher in the spoilt fruit samples. Findings from the mineral and vitamin studies showed that both healthy and spoilt samples of M. domestica had equal values for calcium (12.5± 0.003), potassium (8.5± 0.004), iron (0.38± 0.001) and vitamin C (75± 0.001). However, magnesium, phosphorus and sodium had higher values for the healthy fruit samples. Notwithstanding, phytochemical analysis showed that the healthy fruits of M. domestica possesed tannin, saponin, oxalate and cyanogenic glycoside in appreciable amounts. Five fungal organisms with varying incidence were isolated viz: Botrytis cinerea, Fusarium oxysporum, Aspergillus flavus, Cryptococcus neoformans and Penicillium italicum. The highest percentage incidence was observed for B. cinerea (50± 0.002). This was seconded by F. oxysporum (20± 0.004) while A. flavus, C. neoformans and P. italicum recorded the least fungal incidence.