Chahal, Tanjeet SinghSharma, Diya2024-03-042024-03-042024Sharma, Diya (2024). Assessment of biochemical and nutritional changes in sweet oranges at different developmental stages (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.https://krishikosh.egranth.ac.in/handle/1/5810207370The present study was conducted at Fruit Research Station, Jallowal-Lesriwal, Jalandhar, Department of Fruit Science and Department of Biochemistry, Punjab Agricultural University, Ludhiana during the year 2022-23 on six sweet orange varieties viz. Early Gold, Ruby Nucellar, Westin, Itaborai, Vernia and Moro. The fruit pulp and peel samples were analysed for physico-chemical parameters like fruit weight and size, peel thickness, moisture content and juice content along TA, TSS, sugars, pectin and carotenoids. Most of these parameters exhibited an increasing trend towards progressing fruit maturity except peel thickness and TA which decreased with advancement of fruit maturity. The vitamin C, total phenol and flavonoid content, DPPH scavenging activity and hesperidin content exhibited decreasing trend as the fruit matured with more concentration in fruit peel in comparison to fruit pulp. Early Gold was observed to be suitable for table purposes due to high sugars and TSS whereas Moro peel was found more suitable for medicinal purposes due to high phenol and flavonoid content, hesperidin, carotenoids and antioxidant activity. Considering nutritional content, leaves of Moro registered the highest nutritional content with respect to nitrogen, phosphorus, potassium, iron and copper whereas the maximum calcium, magnesium, zinc and manganese were exhibited by Ruby Nucellar leaves.EnglishThesis