Rasha Mahmoud Kandeel  162079 <br/><br/>
Post-harvest chilling injury of citrus fruit = الإصابة بالبرودة بعد حصاد ثمار الحمضيات \\ GP \\ Dr. Gehan Safwat \\ Dr. Gehan Ahmed \\ ( Fall 2019 )  

 - Giza:  MSA,  2019. 
 - 77 P.;  
 - BIOTECHNOLOGY DISTINGUISHED PROJECTS 2019 .
<br/><br/> Around 162,000 ha of oranges were planted within 2018/2019 in<br/>Egypt, which has increased by 5.1% from the previous year. However,<br/>only 148,850 ha were harvested. Prolonged storage at low, non-freezing<br/>temperatures to maintain quality is the main cause of post-harvest chilling<br/>injury of citrus fruits. As an overall symptom, the fruit with a chilling<br/>injury will appear decayed and abnormally ripe. The application of<br/>salicylic acid and hot water dips significantly reduces injury caused by<br/>chilling. This study aims to test the efficiency of both methods on<br/>‘Valencia’ orange fruits during cold storage at 5°C. Salicylic acid with a 3<br/>mM concentration had an optimum reduction of decay percentage. The hot<br/>water dips at 50°C was optimum in reducing peroxidase activity, at 45°C<br/>was optimum in reducing the chilling injury index, at 55°C was optimum<br/>on reducing the weight loss percentage. Both methods showed similar<br/>effects of reducing the effect of polyphenol oxidase, pectinase and the total<br/>soluble pectin.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>citrus fruit.