Variation of mineral composition in different parts of taro (Colocasia esculenta) corms

•Contents of eleven crucial minerals were studied in four main parts of taro corms.•The upper part contained high levels of P, Mg, Zn, Fe, Mn, Cu and Cd.•The central part was characterised by high contents of K, P, Mg, Zn, Fe, Cu and Cd.•Ca was concentrated in the lower and the marginal parts.•The differences amongst genotypes (cultivars) were significant.