Carotenoid biosynthesis and quality characteristics of new hybrids between tangor (Citrus reticulata x C. sinensis) cv. 'Murcott' and sweet orange (C. sinensis) cv. 'Pera'

Autor(es)

Petry, Fabiane C. ; de Nadai, Fabio B. ; Cristofani-Yaly, Mariangela ; Latado, Rodrigo R. ; Mercadante, Adriana Z.

• Tipo de documento: Artigo Científico
• Fonte: Food Research International; v. 122, p. 10-pg., 2019-08-01.

Resumo

Phenotypic characteristics, as well as the relation between carotenoid accumulation and gene expression during ripening were determined in fruits of five new hybrids between tangor cv. 'Murcott' and sweet orange cv. 'Pera'. The genotypes were classified into the orange-like group, showing mainly epoxycarotenoids, oval fruit shape and yellowish color, or in the mandarin-like group, showing mainly beta-cryptoxanthin, flattened shape and deep orange coloration; although some hybrids presented intermediate characteristics. The diversity in carotenoid composition of hybrids and genitors were mostly explained by patterns of gene expression. High carotenoid (250-426 mu g/g dry weight [dw]) and beta-cryptoxanthin (81-125 mu g/g dw) contents, observed in the mandarin-like group, were generally associated with high expression of upstream genes (GGPPS1, PSY, PDS). On the other hand, low expression/repression of these genes and high expression of downstream genes (BCHX and ZEP) were associated with low carotenoid (similar to 158 mu g/g dw) and beta-cryptoxanthin (5-22 mu g/g dw) contents and epoxycarotenoid accumulation, as occurred in the orange-like group. Breeding experiments resulted in hybrids with outstanding higher carotenoid contents than both genitors (up to 426 mu g/g dw versus 158-250 mu g/g dw in genitors), which was attributed to transgressive segregation. Differences among genotypes have great impact on commercial fruit quality and potential health benefits, such as the provitamin A content. (AU)

• Processo FAPESP: 17/08648-0 - Estudo de alterações no protocolo de digestão in vitro INFOGEST e da adição de lipídios exógenos na bioacessibilidade e hidrólise de ésteres de carotenoides
• Beneficiário: Fabiane Cristina Petry
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
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• Modalidade de apoio: Auxílio à Pesquisa - Regular
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• Beneficiário: Fabiane Cristina Petry
• Modalidade de apoio: Bolsas no Brasil - Doutorado
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• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
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• Modalidade de apoio: Auxílio à Pesquisa - Temático
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• Beneficiário: Mariângela Cristofani-Yaly
• Modalidade de apoio: Auxílio à Pesquisa - Temático