Phenotypic and Essential Oil Profile Diversity, and Heavy Metal Uptake Potential of Peppermint (mentha × Piperita) Accessions

To assess variation in morphological traits, leaf anatomy, shoot yield, essential oil content, essential oil yield, uptake of macro- and microelements, and selected heavy metals, peppermint was sampled from farms of leading producers across Iranian provinces. Mean comparison revealed that the highest dry shoot yield (3410 kg/ha) was obtained from the Karaj accession. The highest essential oil contents, 2.36