Improving propagation of Echinacea purpurea and its content of some active compounds by using Tyrosine and Salicylic acid in vitro. Baghdad Sci.J [Internet]. 2023 Jun. 20 [cited 2024 May 8];20(3(Suppl.):0919. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/7399