fa Herbal Drugs پژوهشي Research <span style="font-size:11pt"><span style="line-height:150%"><span calibri="" style="font-family:"><span style="font-size:12.0pt"><span style="line-height:150%"><span arial="" style="font-family:">Rarely optimal environmental conditions of the plant are available, from water, air and nutrients, Water stress often occurs due to lack of soil moisture or other factors may pay organisms to limited survival. The study of plants under these conditions and knowledge of how the plant responds to water stress on the basis of changing life and physiological processes, so this review describes some aspects of the changes caused by water stress in germination, morphological, physiological and productivity composition in higher plants.</span></span></span></span></span></span> Water stress, morphological and physiological structure, productivity. Introduction 114 122 http://pbp.medilam.ac.ir/browse.php?a_code=A-10-25-36&slc_lang=fa&sid=1 Samar Jasim Mohammed 10031947532846002097 10031947532846002097 Yes Department of Biology, College of Science, University of Misan, Iraq Zainab Jassim Mohammed 10031947532846002098 10031947532846002098 No Department of Biology, College of Science, University of Misan, Iraq Israa Ibrahim Lazim 10031947532846002099 10031947532846002099 No Department of Biology, College of Science, University of Misan, Iraq Mohammad Narimani-Rad mnarimanirad@ymail.com 10031947532846002100 10031947532846002100 No Department of Biomedical Engineering, Central Tehran branch, Islamic Azad University, Tehran, Iran