Contents: 1. Introduction. 2. Seed physiology. 3. Seed viability and vigour. 4. Growth and development. 5. Crop water relations. 6. How do materials pass through membranes?. 7. Absorption of water and mineral elements by plants. 8. The ascent of sap. 9. Organic transport in plants. 10. Transpiration. 11. Photosynthesis: introduction. 12. Photosynthetic apparatus: chloroplast. 13. Photosystems in chloroplast. 14. Photoionization and photophosphorylation. 5. Path of carbon. 16. Cam plants. 17. The photorespiratory carbon oxidation cycle. 18. Dry matter partitioning and crop productivity. 19. Method of measuring photosynethesis. 20. Respiration: the second energy transduction. 21. Nutriophysiology. 22. Hydroponics. 23. Photoperiodism. 24. Plant growth regulators. 25. Auxins. 26. Gibberellins. 27. Cytokinins: juvenile hormones. 28. Ethylene: Fruit ripening hormone. 29. Abscisic acid. 30. Commercial applications of plant growth regulators. 31. Senescence: a suicidal impulse. 32. Abscission. 33. Post harvest physiology. 34. Seed dormancy. 35. Fruit ripening. 36. Stress physiology.