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Quality of two tomato Cultivars grown under different agronomical conditions
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Orientador(es)
Resumo(s)
Quality of two tomato cultivars (‘Dundee’ and ‘V1’) produced in greenhouses, under different agronomical
conditions during a season, was studied. The main goal was to measure quality of tomato fruits produced
under different environmental conditions, and to understand their influence on final quality. To achieve this
objective several physical and chemical general quality parameters were evaluated and to study nutritional
quality, antioxidants (lycopene, beta-carotene, vitamin C) and total sugars (fructose and glucose) were
analyzed. Analyses of variance were performed considering the factors “Harvest time”, “Cultivar” and
“Agronomical conditions” that correspond to the different conditions inside greenhouses. The MANOVA
statistical analysis revealed that all the factors considered were significant as well as their interactions.
The factor “Harvest time” was the most important to explain the differences. The ‘V1’ fruits produced in
the metallic greenhouse without additional CO2 had higher and more homogeneous weight values and
also higher skin firmness. The colour coordinate a* was generally lower for fruits grown in traditional
greenhouse. ‘Dundee’ fruits reached the highest SST medium value of 6.37 ºBrix. Biosynthesis of lycopene
and vitamin C was affected by agronomical conditions and also predetermined by cultivars. ‘Dundee’
cultivar seems to be more sensitive to agronomical conditions than the ‘V1’. Beta carotene content was
mainly due to genetic factors. The ‘V1’ exhibited higher values of beta carotene for all the greenhouse
conditions.
Descrição
Proceedings of the International Conference “Environmentally friendly and safe
technologies for quality of fruit and vegetables”, held in Universidade do Algarve, Faro,
Portugal, on January 14-16, 2009. This Conference was a join activity with COST Action 924.
Palavras-chave
Antioxidants Tomato Quality parameters Physical-chemical analysis