Document Type : Research Paper

Authors

• Soodabeh Einafshar
• Koorosh Shojaei Noferest

AREEO

Abstract

For preventing the production of reducing sugars during cold stress in potatoes, this project was implemented using a factorial experiment in the form of a completely randomized design in 3 repetitions. The treatments were: two potato varieties (Agria and Fontin), antifreeze agents (spraying calcium solution (1.5 liters per hectare), potassium (5 kg/h of potassium sulfate soluble in water), Delfan Plus amino acid composition
(1 liters per hectare) and ascorbic acid (one per thousand) and no foliar spraying treatment (control treatment) and six months of storage. The foliar spraying was carried out on Sep. 26th and Oct. 3rd, 2018, according to the forecast of cold weather in Jalga Rukh region. After harvesting, the potatoes were stored in a conditioned storage at a temperature of 8 ˚C and a humidity of 98-95% for 6 months. Moisture content, weight loss, reducing sugar, ash, texture and color analysis (determining the characteristics a*, L*, b*) were measured once every two months. The use of antifreeze agents decreased reducing sugars and color characteristics a*, and ∆E and increased b* and *L during 6 months of storage. Application of anti-freezing substances in the production of reducing sugars caused maintaining the physical properties of potatoes such as the hardness of its texture. The lowest amount of reducing sugars was found in Agria cultivar and in the amino acids treatment (3.380 mg.100g^-1) and the highest amount was found in Fontin cultivar (20.24 mg.100g^-1).

Keywords

• amino acid
• ascorbic acid
• potassium
• calcium
• browning interactions

Main Subjects

• شیمی مواد غذایی