Effect of Carboxymethyl Cellulose and Alginate Coating Combined with Brewer Yeast on Postharvest Grape Preservation.

Theeffect of carboxymethyl cellulose and alginate coating combinedwith brewer yeast on postharvest grape preservation was investigated. Thepostharvest grapeswere coatedwith2%of alginate and3%of carboxymethyl cellulose combined with 1.5 × 109 CFU/mL of brewer yeast.The combined treatment samples showed good sensory character on day 13 compared with control samples or only coated samples. The increase of weight loss and decrease of total soluble solids of combined treatment grapes were restrained. Furthermore, the protective enzymes including superoxide dismutase, peroxidase, and catalase of combined treatment sample showed higher activities.Accordingly, the increase ofmalonaldehyde contentwas also restrained andmore vitamin Cwas preserved in combined treatment samples. At day 13, the weight loss rate and the total soluble solids of grape treated with coating + yeast were 23.6% lower and 20.6% higher than those of control samples, respectively. Coating grapes with 2% of alginate and 3% of carboxymethyl cellulose combined with brewer yeast of 1.5 × 109 CFU/mL was a well-proven method to preserve postharvest grapes. [ABSTRACT FROM AUTHOR]