Chemical characteristic of sweet passion fruit (Passiflora lingularis Juss) seeds from Indonesia based on maturity levels

Abstract

Sweet passion fruit (Passiflora ligularis Juss) cv. Gumanti is superior varieties of sweet passion fruit that is widely cultivated in Solok Regency of West Sumatra Province, Indonesia. This fruit can consume directly as fresh fruit and can be processed into juice that gave a by-product such as the seeds. The purpose of this research is to analyse the chemical properties of sweet passion of cv. Gumanti seed based on maturity level so that the nutritional content is known. Chemical analyses were performed such as proximate analysis, total phenol and antioxidant activity. Proximate analysis showed that the seeds of passion fruit are rich in carbohydrates+fibre (61.04%, 58.40% and 60.39% and crude fat (21.03%, 20.36% and 20.83%, respectively for maturity level I, II, and III), didn't give significant difference based on maturity level (P>0.05). Furthermore, the result showed strong antioxidant activity (IC50: 50-100 ppm), where there was a significant based on maturity level (P < 0.05). Total phenol analysis showed a linear relationship with antioxidant activity. Thus, the seeds of sweet passion fruit also have potential as a raw in the food industries, chemical, and pharmacy such as the seeds of acid passion fruit that have been reported by previous researchers.