Dastyar,Y , , Aelaei,M , and Kheiry,A . "Effect of salicylic acid and methyl jasmonate on morphological traits, enzymatic activity and essential oil percentage of purple coneflower plant (Echinacea purpurea L.) in Zanjan climate", Iranian Journal of Horticultural Science, 50, 1, 2019, 91-103. doi: 10.22059/ijhs.2018.246348.1352