investigation of volatiles in charentais cantaloupe melons (cucumis melo var. cantalupensis). characterization of aroma constituents in some cultivars.volatile compounds of 15 charentais melon cultivars, known to exhibit differences in their ripening behaviors and in their storage lives (wild, mid, and long shelf life), were investigated. twenty-eight volatiles (11 esters, 8 sulfur compounds, 6 alcohols, and 3 carbonyl compounds) were isolated by direct dichloromethane extraction and analyzed by means of gc-ms and gc-fid. a considerable reduction in the aroma profile was observed for the long shelf life cultivars, in which total volatiles were ...200415237961
functional characterization of a melon alcohol acyl-transferase gene family involved in the biosynthesis of ester volatiles. identification of the crucial role of a threonine residue for enzyme activity*.volatile esters, a major class of compounds contributing to the aroma of many fruit, are synthesized by alcohol acyl-transferases (aat). we demonstrate here that, in charentais melon (cucumis melo var. cantalupensis), aat are encoded by a gene family of at least four members with amino acid identity ranging from 84% (cm-aat1/cm-aat2) and 58% (cm-aat1/cm-aat3) to only 22% (cm-aat1/cm-aat4). all encoded proteins, except cm-aat2, were enzymatically active upon expression in yeast and show different ...200516247561
sucrose metabolism in netted muskmelon fruit during development.sugar content and composition are major criteria used in judging the quality of netted muskmelon (cucumis melo l. var reticulatus) fruit. sugar composition and four enzymes of sucrose metabolism were determined in ;magnum 45' muskmelon fruit at 10-day intervals beginning 10 days after pollination (dap) until full-slip (35 dap). sugar content increased in both outer (green) mesocarp and inner (orange) mesocarp between 20 and 30 dap. the major proportion of total increase in sugar was attributed t ...198716665448
ethylene regulation of fruit softening and cell wall disassembly in charentais melon.cell wall disassembly in ripening fruit is highly complex, involving the dismantling of multiple polysaccharide networks by diverse families of wall-modifying proteins. while it has been reported in several species that multiple members of each such family are expressed in the same fruit tissue, it is not clear whether this reflects functional redundancy, with protein isozymes from a single enzyme class performing similar roles and contributing equally to wall degradation, or whether they have d ...200717308329
the relationship of host range, physiology, and genotype to virulence on cantaloupe in pseudomonas syringae from cantaloupe blight epidemics in france.abstract in 1993, a bacterial blight caused important losses of cantaloupe (cucumis melo var. cantalupensis) in southwestern france and has now been reported in all cantaloupe-growing regions of france. the causal agent of this blight is pseudomonas syringae, although on a worldwide basis this bacterium has not been a major pathogen of melon for over 50 years. to identify the pathovar of the cantaloupe pathogen, we employed biochemical tests, plasmid and chromosomal profiling, and host range stu ...200018944544
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