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      Qualidade de frutos de tomate da cv. Santa Clara, mutante de fruto amarelo e seus híbridos F1 Translated title: Quality of tomato red fruit, cv. Santa Clara, its yellow mutant and respective F1 hybrid

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          Abstract

          A caracterização de alguns atributos físicos e químicos de frutos de tomate da cv. Santa Clara, um mutante de fruto amarelo, e o híbrido F1 obtido do cruzamento entre eles, foi feita com base nos teores de b-caroteno, licopeno, vitamina C, pH, matéria fresca, matéria seca, diâmetro do fruto, diâmetro do pericarpo, acidez e sólidos solúveis totais dos tecidos loculares e do pericarpo. Os frutos maduros amarelos apresentaram teores reduzidos de b-caroteno, licopeno e vitamina C, enquanto o híbrido apresentou teores semelhantes ao genótipo normal. Tanto o fruto mutante quanto o F1 apresentaram teor de pH menor que o do fruto normal. Não houve diferença significativa quanto a matéria fresca e seca totais, diâmetro do fruto e do pericarpo e acidez. Os teores de sólidos solúveis totais do pericarpo foram inferiores nos frutos do mutante amarelo e F1, em relação ao genótipo normal, enquanto os teores de sólidos solúveis totais da massa locular não diferiram, estatisticamente, entre os genótipos.

          Translated abstract

          The determination of some physical and chemical attributes of red fruits from tomato cv. Santa Clara, a yellow mutant and the F1 hybrid, were based on b-carotene, lycopene, vitamin C, pH, fresh and dry weight matter, pericarp and fruit diameter, titrateable acidity and total soluble solids. Ripe fruits of the yellow mutant showed reduced levels of b-carotene, lycopene and vitamin C, while fruits of the F1 hybrid showed levels of carotenoid pigments and vitamin C similar to the red fruit. Both mutant and F1 ripe fruits showed lower pH levels than the red parentals. Total fresh fruit and dry weight matter, pericarp and fruit diameter, and acidity were similar in the three genotypes studied. The total soluble-solids content of the pericarp was lower in the mutant and F1 fruits, whereas their concentration in the locule tissues was similar in all genotypes.

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          Most cited references21

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          Normas analíticas do Instituto Adolfo Lutz

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            Molecular biology of fruit ripening and its manipulation with antisense genes.

            Considerable progress in tomato molecular biology has been made over the past five years. At least 19 different mRNAs which increase in amount during tomato fruit ripening have been cloned and genes for enzymes involved in cell wall degradation (polygalacturonase and pectinesterase) and ethylene synthesis (ACC synthase) have been identified by conventional procedures. Transgenic plants have been used to identify regions of DNA flanking fruit-specific, ripening-related and ethylene-regulated genes and trans-acting factors which bind to these promoters have also been identified. Antisense genes expressed in transgenic plants have proved to be highly effective for inhibiting the specific expression of ripening-related genes. These experiments have changed our understanding of how softening occurs in tomato fruit. Antisense techniques have also been used to identify genes encoding enzymes for carotenoid biosynthesis (phytoene synthase) and ethylene biosynthesis (the ethylene-forming enzyme). The altered characteristics of fruit transformed with specific antisense genes, such as retarded ripening and resistance to splitting, may prove to be of value to fruit growers, processors and ultimately the consumer.
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              Plasma Carotenoid Levels in Human Subjects Fed a Low Carotenoid Diet

                Author and article information

                Journal
                hb
                Horticultura Brasileira
                Hortic. Bras.
                Associação Brasileira de Horticultura (Vitoria da Conquista, BA, Brazil )
                0102-0536
                1806-9991
                July 1999
                : 17
                : 2
                : 106-109
                Affiliations
                [02] orgnameUFV orgdiv1Depto. de Fitotecnia
                [01] orgnameUniversidade Federal de Roraima orgdiv1Escola Agrotécnica
                Article
                S0102-05361999000200006 S0102-0536(99)01700206
                d1a5f9b9-3087-4d65-b4ce-3c0372b0af2c

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 22 March 1999
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 22, Pages: 4
                Product

                SciELO Brazil

                Categories
                Pesquisa

                Lycopersicon esculentum,sólidos solúveis,licopeno,b-caroteno,soluble solids,lycopene,b-carotene

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