The effect of PEG on callus growth of Tomato plants Lycopersicon escolentum mill . Journal of Madenat Alelem, [S. l.], v. 7, n. 1, p. 11–19, 2015. Disponível em: https://journal.mauc.edu.iq/index.php/JMAUC/article/view/156. Acesso em: 27 feb. 2026.