With this Third Edition, the authors and contributors set a new standard for textbooks in the field by tailoring the study of plant physiology to virtually every student—providing the basics for introductory courses without sacrificing the more challenging material sought by upper-division and graduate-level students. Key pedagogical changes to the text will result in a shorter book. Material typically considered prerequisite for plant physiology courses, as well as advanced material from the Second Edition, will be removed and posted at an affiliated Web site, while many new or revised figures and photographs (now in full color), study questions, and a glossary of key terms will be added. Despite the streamlining of the text, the new edition incorporates all the important new developments in plant physiology, especially in cell, molecular, and developmental biology. The Third Edition's interactive Web component is keyed to textbook chapters and referenced from the book. It includes WebTopics (elaborating on selected topics discussed in the text), WebEssays (discussions of cutting-edge research topics, written by those who did the work), additional study questions (by chapter), additional references, and suggestions for further reading.