The objective of this work was to determine the effect of Moringa,
Neem and Bitter leaf as edible coatings for extended storage life and quality
retention of tomato fruits. The presence of decay is a very serious defect
which renders tomatoes unmarketable. Fungi are the most important and prevalent
pathogens infecting a wide range of fruits and causing destructive and
economically important losses of fruits during storage, transportation and
marketing. The use of edible coating has also received more attention in recent
years due to the growing interest in reducing environmental pollution, the need
to prolong the shelf life of foods and the increasing demand for healthier
ecological foods. The impact of extracts from plant leaves as edible coatings
on quality retention of tomato (Solanum
lycopersicon L.) fruits after inoculation with fungal isolates was
investigated. The experiment was conducted in the Botany Laboratory of the
Benue State University, Makurdi. Healthy tomato fruits of the Roma variety were
collected at semi ripe stage from the experimental farm. A total of five fungi
namely; Aspergillus flavus, Penicillium waksmanii, Lasiodiplodia theobromae, Fusarium oxysporum and Colletotrichum asianum were artificially
inoculated into the healthy tomato fruits. The inoculated tomato fruits were
coated with leaf extracts of Moringa,
Neem and Bitter leaf at 80%w/v and 100% w/v and stored at room temperature.
Quality parameters of tomato fruits evaluated include; Beta-carotene content,
Lycopene content, pH and Total soluble solids. Analysis of Variance (ANOVA) was
used to analyze data. Leaf extract of Moringa,
Neem and Bitter leaf at 100% w/v gave the best quality retention of tomato
fruits. There was a significant increase (P≤0.05) in Beta-carotene and lycopene
content of tomato fruits treated with Moringa,
Neem and Bitter leaf extracts at 100% w/v over the storage period. pH and total
soluble solids content of tomato fruits treated with Moringa, Neem and Bitter leaf extracts decreased with increased
rate of concentration over the duration of storage. Lycopene is the major
carotenoid compound in tomatoes, it gives the fruit its characteristic red
colour. It was observed that lycopene content from all treatments increased as
the concentration increased over storage time with the untreated having the
least lycopene content. The increase in lycopene content of fruits treated with
leaf extract might be due to the faster ripening rate of fruit which leads to
the conversion of chloroplasts to chromoplasts and lycopene accumulation in the
internal membrane system. Plant extracts have the potential to maintain the
quality parameters of tomato fruits during storage. The use of leaf extract of Moringa, Neem and Bitter leaf at 100%
w/v concentration should be utilized in coating tomato fruits to maintain their
quality parameters during storage. Improvement in methods of coating and the
number of additives should be enhanced to effectively impact the overall
quality of food products during storage.
Author
(s) Details
Liamngee K
Department of Biological Sciences, Benue State University Makurdi, Nigeria.
Dangana MD
Department of Applied Biology, (Section) Microbiology, Kaduna Polytechnic,
Kaduna State, Nigeria.
Hafsat D
University of Maiduguri, Borno State, Nigeria.
Chigboja MO
Department of Medical Biochemistry, Faculty of Basic Medical Sciences,
College of Medicine, University of Nigeria, Enugu Campus, Enugu State, Nigeria.
Ameh LO
Center for Food Technology and Research, Benue State University, Makurdi,
Nigeria.
Lawir CN
Center for Food Technology and Research, Benue State University, Makurdi,
Nigeria.
Fayinminu AO
Department of Biological Sciences, Benue State University Makurdi, Nigeria.
Please see the book here:- https://doi.org/10.9734/bpi/crpas/v7/3734