Plant Physiology is a monthly peer-reviewed scientific journal that covers research on physiology, biochemistry, cellular and molecular biology, genetics, biophysics, and environmental biology of plants. The journal has been published since 1926 by the American Society of Plant Biologists. The current editor-in-chief is Michael R. Blatt (University of Glasgow and Laboratory of Plant Physiology and Biophysics). According to the Journal Citation Reports, the journal has a 2014 impact factor of 6.841 ranking it 2nd out of 190 journals in the category "Plant Sciences".