Investigation of variations of the morphological values and flowering shoot yield in different mint species at Iran

Abstract

This experiment was carried out using a randomized complete block design with three replications. The factor
studied included mint species (Mentha longifolia var. amphilema (from Qazvin and Ardabil localities), Mentha
spicata (from Tehran and Yazd localities), Mentha piperita (from Tehran and Ardabil localities) and Mentha
aquatica (from guilan and Ardabil localities) that were collected at end of flowering stage in Iran during 2007. the
results showed that mint species had significant effect on shoot yield, plant height, lateral stem number and leaf
width (p 0.01) and leaf length and stem diameter (p < 0.05). M. longifalia var. amphilema from Qazvin locality was
provided highest shoot yield (2,656 kg/ha), plant height (70.67 cm) and stem diameter (4.1 mm). Longest leaf
length (4.01 cm) and widest leaf width (2.32 cm) were achieved by M. piperita from Tehran locality and highest
lateral stem number (39 stem per plant) was obtained by M. aquatica from guilan locality. Our findings indicated
that were significant difference between morphological values and shoot yield in mint species. Therefore, the
selection of species that perform well over a wide range of environments can increase quantity and quality yields
of medicinal and aromatic plants.