Enhancing Anna Apples’ Productivity, Physico-Chemical Properties, and Marketability Using Sprays of Naphthalene Acetic Acid and Inhibitors of Ethylene for Alleviating Abiotic Stresses

In order to improve the resistance of apples stresses (abiotic stresses) during hot and dry summers enhance their productivity marketability, Anna apple trees were treated with aminoethoxyvinylglycine (AVG), 1-methlcyclopropene (1-MCP), naphthalene acetic acid (NAA), alone, or in combination, two successive seasons. All treatments significantly increased yield per tree, average fruit volume, diameter, weight compared control (growing under without any treatments). reduced size, total soluble solid (TSS) content, anthocyanin carotenoid sugar solids, percentage, they led softening, loss weight, firmness, breakdown as well a decreased polyphenol oxidase peroxidase activity at one-week post-harvest (except for 20-ppm NAA) comparison control. Trees 320-ppm 1-MCP + 250-ppm AVG exhibited maximum no-reducing sugars starch. On other hand, NAA produced TSS sugars, (TSS)/acidity ratio. The application effectively delayed harvest 14 days Our results show that sprays inhibitors ethylene had significant effect on marketability abiotic stresses.