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Molecular and Genetic Regulation of Sensory Quality of Climacteric Fruit

El-Sharkawy, Islam and Manriquez, Daniel and Flores, Francisco B. and Latché, Alain and Pech, Jean-Claude Molecular and Genetic Regulation of Sensory Quality of Climacteric Fruit. (2005) In: 5th International Postharvest Symposium, 6 June 2004 - 11 June 2004 (Verona, Italy).

(Document in English)

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Official URL: http://www.actahort.org/books/682/682_44.htm


The sensory quality of fruit has become a major criterion in making the purchasing decision by consumers. Breeding programs have mainly been directed, from the post-harvest stand point, towards improving shelf-life. Chance seedlings or mutants with improved agronomic traits and/or extended shelf-life have been used for introgressing the long shelf-life character and eventually improved sensory quality traits in commercial genotypes of apple, melon or tomato. Because the plant hormone ethylene plays a central role in both storability and ripening of climacteric fruit, the generation by biotechnology of ethylene-inhibited fruit has offered a powerful tool to better understand, at the molecular and genetic level, the interrelations between storability and sensory quality. In the melon, inhibition of ethylene synthesis results is a strong inhibition of the synthesis of aroma volatiles while the accumulation of sugars is not affected or is even improved. The softening of the flesh is strongly affected but not abolished. Mid or long shelf-life melons generated by classical breeding present the same behavior. The generation of recombinant inbred lines by crossing a typical climacteric melon (Cantaloupe Charentais of the cantalupensis group) with a non climacteric melon (PI161375 of the agrestis chinensis group) allowed to demonstrate that the climacteric character is conferred by 2 duplicated loci only, which are of great importance for the regulation of storability and sensory quality. Due to the importance of aroma volatiles in sensory quality and to the strong negative correlation between aroma production and ethylene synthesis, we have developed a research program aimed at isolating genes involved in the synthesis of aroma volatiles. We will report on the recent advances in the field with special emphasis on the characterization of genes responsible for the synthesis of esters, a family of compounds crucial for the flavor of many fruit.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Published in : Acta Horticulturae, n° 682, pp.377-382, ISSN : 0567-7572. Thanks to International Society for Horticultural Science editor. The definitive version is available at http://www.actahort.org/index.htm The original PDF of the article can be found at Acta Horticulturae website : http://www.actahort.org/books/682/
HAL Id:hal-04041024
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Institut National de la Recherche Agronomique - INRA (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
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Deposited On:02 Dec 2008 11:20

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