Plant Physiology, 4th Edition by Lincoln Taiz

A comprehensive textbook on how plants function from cells to whole organisms, integrating biochemistry, biophysics, and molecular biology to explain water relations and transport, membrane and signaling processes, photosynthesis and respiration, mineral nutrition, growth and development, and responses to environmental stress; this edition emphasizes experimental foundations, quantitative analysis, and modern advances in genomics and imaging, linking fundamental mechanisms to applications in agriculture and ecology.