Effect of the ripening stage on the hot-air drying behavior of tomato (Solanum lycopersicum L.): Cell wall polysaccharides, ultrastructure, and mechanisms of bioactive and flavor evolution
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引用次数: 0
Abstract
Industrial tomato drying is strongly influenced by ripening stage. This study evaluated mature green, breaker, and red tomatoes for physicochemical traits, cell-wall polysaccharides, microstructure, drying behavior, bioactives, and volatiles. With ripening, polygalacturonase and pectin methylesterase activities increased, water- and chelator-soluble pectins accumulated, Na₂CO₃-soluble pectin and hemicellulose declined, and SEM/TEM observations showed apparent parenchyma loosening and middle-lamella blurring. Red ripe tomatoes had higher effective moisture diffusivity than mature green fruit (1.62 × 10−9 vs 1.25 × 10−9 m2/s) and 24.44% shorter drying time. Lycopene increased after ripening and drying, total phenolic equivalents rose with maturity on a dry-matter basis, and ascorbic acid declined after drying. Electronic-nose and HS-SPME-GC–MS analyses indicated maturity-dependent volatile fingerprints, with breaker tomatoes enriched in tentatively annotated aroma-related aldehydes and esters. These findings underscore maturity-based grading as a vital strategy to balance drying efficiency, nutritional quality, and flavor development.
期刊介绍:
Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.