Article Number: DRJAFS7063242020

DOI: https://doi.org/10.5281/zenodo.3263941

ISSN: 2354-4147

Vol.7 (6), pp. 147 -157, June 2019

Copyright © 2019

Author(s) retain the copyright of this article


Original Research Article

Evaluation of Textural Qualities and Chemical Properties of some Tomato Cultivars

Eboibi, O.

Akpokodje, O. I.

Nyorere, O.

Oghenerukevwe, P.

*Uguru, H.


Abstract

This study investigated the effect of maturity stage on the textural-chemical properties of fresh tomatoes (Lycopersicum esculentum Mill.) fruits. Seven tomato cultivars (Ibadan local, Beske, Tropimech, UC82B, Kelvin, Nadira and Roma) were harvested at three maturity stages namely; breaker, pink and ripe red. The textural qualities (firmness, springiness, adhesiveness, chewiness, stringiness and gumminess) of the tomato fruits were measured using the Warner-Bratzler shear force (WBS) method. The chemical properties (pH and electrical conductivity) of the fruits were measured by pH and electrical conductivity meters. Results of the texture profile analysis showed that tomato fruits exhibited a strong dependence on the degree of maturity of the fruits at harvest. All the textural qualities determined decrease as the fruits matured from the breaker stage to the ripe red stage. From the results, the Tropimech tomato fruits had the highest average skin firmness and springiness of 53.16 N and 1.101 respectively, while UC82B tomato fruits had the highest average adhesiveness of 21.47 N.s. The results further showed that breaker tomato fruits exhibited the highest electrical conductivity values than those corresponding to pink and red ones. However, the red tomato fruits exhibited the highest pH values than their corresponding to breaker and pink ones. The average electrical conductively ranged between 0.464 S/m and 0.438 S/m; while the average pH of the tomato fruits ranged between 3.75 and 4.89. The results showed variations in the textural qualities and chemical properties among the seven tomato cultivars studied.


Keywords: Texture profile analysis, chemical properties, tomato fruit, maturity stage


 Received: June 17, 2019  Accepted: June 27, 2019  Published: June 30, 2019

Eboibi Et Al


Copyright © 2019 Direct Research Journal of Agriculture and Food Science