title: Non-Destructive Assessment of Aroma Volatiles from a Climacteric Near-Isogenic Line of Melon Obtained by Headspace Stir-Bar Sorptive Extraction.
abstract: A climacteric aromatic near-isogenic line (NIL) of melon (Cucumis meloL.) SC3-5-1 contained an introgression of the non-climacteric Korean cultivar "Shongwan Charmi" accession PI 161375 (SC) in the genetic background of the non-climacteric cultivar "Piel de Sapo" (PS). The aroma production was monitored during ripening at 21 °C in intact fruit using headspace sorptive bar extraction (HSSE). Bars were composed of polydimethylsiloxane (PDMS) and aromas were desorbed and analyzed by gas-chromatography mass-spectrometry. The aromatic profile was composed of 70 aromatic compounds plus 21 alkanes with a predominance of esters, particularly acetate (2-methylbutyl acetate, 2-methylpropyl acetate, hexyl acetate, and phenylmethyl acetate). Some compounds were severely affected by postharvest time. The acetate esters (3-methylbutyl acetate, butan-2-yl acetate and phenylmethyl acetate) decreased with ripening and sulfur-derived compounds (S-methyl butanethioate andS-methyl 3-methylbutanethioate) increased gradually with ripening. A few compounds increased at the senescence phase (propyl ethanoate). Other compounds such as hexadecanoic acid showed a marked decrease after harvest, some decreasing from a relative maximum at harvest (2-methylpropyl hexanoate;n-hexanoic acid; nonanoic acid).
authors.affiliation: Department of Agricultural and Food Engineering, Technical University of Cartagena (UPCT), Paseo Alfonso XIII, 48, ETSIA & Institute of Plant Biotechnology, E-30203 Cartagena (Murcia), Spain. juanp.fdez@upct.es.
authors.forename: Juan Pablo
authors.initials: JP
authors.lastname: Fernández-Trujillo
authors.affiliation: Department of Agricultural and Food Engineering, Technical University of Cartagena (UPCT), Paseo Alfonso XIII, 48, ETSIA & Institute of Plant Biotechnology, E-30203 Cartagena (Murcia), Spain. noelia.dossantos@upct.es.
authors.forename: Noelia
authors.initials: N
authors.lastname: Dos-Santos
authors.affiliation: Department of Agricultural and Food Engineering, Technical University of Cartagena (UPCT), Paseo Alfonso XIII, 48, ETSIA & Institute of Plant Biotechnology, E-30203 Cartagena (Murcia), Spain. rociomartinez_65@hotmail.com.
authors.forename: Rocío
authors.initials: R
authors.lastname: Martínez-Alcaraz
authors.affiliation: Department of Agricultural and Food Engineering, Technical University of Cartagena (UPCT), Paseo Alfonso XIII, 48, ETSIA & Institute of Plant Biotechnology, E-30203 Cartagena (Murcia), Spain. ines.lebleis@neuf.fr.
authors.forename: Inés
authors.initials: I
authors.lastname: Le Bleis
keywords: Cucumis melo L.; HSSE; climacteric ripening; ethylene; fruit quality; introgression lines; postharvest