. "Effects of two arginine enantiomers (L and D) pre-treatment on some physiological parameters and the expression of arginase 1 gene in tomato plants under drought Stress. Fereshteh Mirzaie1, Mohammad Mehdi Yaghoobi2, Khosrow Manouchehri Kalantari1 and Fatemeh Nasibi1*". Iranian Journal of Plant Physiology, 4, 2, 2014, 1005-1013. doi: 10.22034/ijpp.2014.540311