Chemical composition and bioactive compounds of Cucurbitaceae seeds: Potential sources for new trends of plant oils
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Chemicalcompositionandbioactivecompoundsof
3. Results and discussion
3.1. Chemical composition of Cucurbitaceae seeds Table 1 shows the chemical composition of ‘Essahli’ pumpkin seeds, ‘Crimson’ watermelon seeds, and ‘Ananas’ melon seeds varieties. Significant differences (p< 0.05) were observed among Cucurbitaceae seeds in their oil content, protein, total fibre, ash, and sugars. Pumpkin seeds possess high levels of oil (35.53%) and protein (40%) in comparison to watermelon and melon seeds whose crude oil and protein contents were totalling 19.23% and 28.44% for the ‘Crimson’ variety and 19.41% and 26.15% for the ‘Ananas’ variety, respectively. According to studies conducted by Kulaitienė et al. (2018) and Seymen et al. ACCEPTED MANUSCRIPT 11 (2016) the oil content of the Cucurbita pepo L. Lithuanian cultivars and Turkish genotypes seeds ranged between 47.24 - 47.43% and 33.04 - 46.97%, respectively. Furthermore, crude oil and protein contents of the seeds of the Tunisian Citrullus lanatus ‘Crimson’ variety were lower than those reported by Al-Khalifa (1996) for the Iranian, Egyptian, and Chinese Citrullus lanatus varieties, which ranged from 20.64 to 21.7%, and 25.29 and 41.58%, respectively. Cucumis melo ‘Ananas’ variety’s seeds had lower oil and protein contents than those reported by Mallek-Ayadi et al.(2018) for the Tunisian ‘Maazoun’ Cucumis melo variety which possessed oil and protein contents of 30.65% and 27.41%, respectively. The highest oil percentages found in the seeds of the Cucurbita pepo var. ‘Essahli’, Citrullus lanatus var. ‘Crimson’, and Cucumis melo var. ’Ananas’ make them fairly ideal for many oil industry applications. According to Nyam et al. (2009), differences among oil contents could possibly originate from plant diversity, climate conditions, ripening stage and the used extraction method. Note that Cucurbitaceae seeds examined in our study also exhibited high amounts of crude fibre. The highest content was observed in the Citrullus lanatus variety (48.26%). Interestingly, Cucurbitaceae seeds were found to contain significant amounts of minerals, too (Table 1). Phosphorus was the most prevalent element (1471.24 mg/100g, 1124 mg/100g, and 787.31 mg/100g for Cucurbita pepo, Cucumis melo, and Citrullus lanatus seeds, respectively). The phosphorus was followed in descending order by magnesium, potassium, and sodium; by potassium, sodium, and magnesium, and by potassium, magnesium, calcium, and sodium in Cucurbita pepo var. ‘Essahli’, Citrullus lanatus var. ’Crimson’, and Cucumis melo var. ‘Ananas’ seeds, respectively. Our findings are in accordance with the mineral composition of the melon seeds of the ‘Tibish’ and ‘Maazoun’ varieties, in which potassium and magnesium were the major minerals (Mallek-Ayadi et al., 2018; Siddeeg et al., 2014). The Mineral composition of the seeds of the Egyptian watermelon ACCEPTED MANUSCRIPT 12 and pumpkin varieties were rather different than that found in our study. Phosphorus was the most prevalent element followed in descending order by potassium, magnesium, and calcium (El-Adawy and Taha, 2001). 3.2. Chemical analysis Table 2 shows the physicochemical characteristics of Cucurbitaceae seed oils. The specific gravitational value of the watermelon seed oil was lower than those of melon and pumpkin seed oils and the values perfectly corresponded with the 0.917 and 0.919 values reported by El-Adawyand Taha (2001) for the pumpkin and watermelon seed oils. However, the specific gravity values were lower than those reported by Al-Khalifa (1996) for the Egyptian, Iranian, and Chinese Citrullus lanatus varieties ranging between 0.9235 and 0.9283 and those reported by Ramazan et al. (2012) for the Citrullus lanatus vercitroides and Download 0.8 Mb. Do'stlaringiz bilan baham: |
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