Olfa, B., Imen, T., Mohamed, C. and Nasri-Ayachi M, B. 2016. Essential oil and trichome density from Origanum majorana L. shoots affected by leaf age and salinity . Bioscience Journal. 32, 1 (Jan. 2016), 238–245. DOI:https://doi.org/10.14393/BJ-v32n1a2016-30323.