This book is intended for people interested in plant ecophysiology research or related sciences. It will also be useful for scientists working in forestry or agronomy. Twenty-seven chapters cover a wide variety of techniques, from electron microscopy applied to seed germination, flow cytometry applied to different measures, cell cycle studies, field and lab measures related to photosynthesis (from pigments to gas exchange and fluorescence), determination of water-related parameters, and techniques to measure phenolics, total soluble proteins, stress proteins, polyamines, proline, RubisCO activity, ATPases, ABA, and ion interchange. Each chapter includes both physiological aspects of the measured parameter and the chosen reference technique for that parameter. A special emphasis is put on allelopathy research, although the book will be valuable for the study of any kind of stress. All chapters can be read independently, and both expert and inexperienced scientists will be able to take advantage of the handbook.