Plant physiology 482 PLANT PHYSIOLOGY 84 Plant Physiology 75 Physiology 50 Botany 43 Plants 38 Plant Physiology and Biochemistry 37 Photosynthesis 31 Photo synthesis 30 plant physiology 26 Botanical science 23 Plant Breeding and Genetics 20 Plant Production 19 Biology 17 Crop Produce 15 Horticultural Crops, (New March 2000) 14 Plant Physiological Phenomena 14 Plant diseases 14 Biochemistry 13 Life sciences 13 Plant Pests, (New March 2000) 13 Enzymes 12 Field Crops, (New March 2000) 12 Food Composition and Quality 12 Metabolism 12 Plant molecular biology 12 Plant pests 12 Respiration 12 Plant anatomy 11 Plant physiology-- Botany 11