mineral contents and bioactive properties of centaura spp. leave and seeds

the mineral contents of centaura leave and seeds were determined by inductively coupled plasma-atomic emission spectroscopy (icp-aes). macro element concentrations (p, k, ca, mg and s) of samples were found at high levels. k was established at high level in both leave and seed samples of centaurea. while k contents of leaves changes between 7254.10 mg/kg (centaurea lycaonica) and 26396.36 mg/kg (centaurea pterocaula), it ranged from 6242.22 mg/kg (centaurea salicifolia) to 15182.07 mg/kg (centaurea cariensis). ca contents of leaves changed between 6268.70 mg/kg (centaurea derderiifolia) and 23471.24 mg/kg (centaurea stapfiana). the same element was found between 1963.45 mg/kg (centaurea salicifolia) and 12470.46 mg/kg (centaurea stapfiana). fe contents of leaves changed between 55.52 mg/kg (centaurea cariensis boiss. subsp. longipapposa) and 502.47 mg/kg (centaurea salicifolia). na content ranged from 324.27 mg/kg (centaurea cariensis) to 4938.52 mg/kg (centaurea cariensis). anthocyanin contents of leaves ranged from 16.3 µmol/g (centaurea kizildaghensis) to 109.3 µmol/g (centaurea stapfiana). while total phenolic contents of leaves change between 693.5 mg gallic acid/g extract and 826.3 mg gallic acid/g extract, total phenolic content of seeds ranged from 655.1 mg  gallic acid/g extract (centaurea derderiifolia) to 1342.0 mg gallic acid/g extract (centaurea cariensis boiss. subsp. longipapposa). total flavonoid contents of centaurea leaves changed between 49.2 mg catechol/g (centaurea nigrofimbria) to 157.5 mg catechol/g (centaurea pterocaula).