Plant Physiology is published monthly, in three volumes per year, by the American Society of Plant Biologists (ASPB). Established in 1926, Plant Physiology is an international journal devoted to physiology, biochemistry, cellular and molecular biology, genetics, biophysics, and environmental biology of plants. Plant Physiology is one of the world's oldest and most well-respected plant science journals. Plant Physiology maintains its position as the plant biology journal with the highest citation rate.