“…Onion ( Allium cepa L.) is a biennial plant belonging to the Liliaceae family, one of the most important vegetable crops with a world production of about 55 million tons (Shokoohinia et al, 2016, Griffiths et al, 2002, Teena et al, 2016, Raja et al, 2016). It is known to contain many phytochemicals such as carotenoids, copaenes, flavonoids, minerals, phenolics, phytoestrogens, terpenoids, vitamins, anthocyanins, and amino acids.…”