SUBJECT INDEX 



233 



Photosynthesis 27-8, 93, 99, 101, 129, 

 189, 218 



Photophile 133-6 



Photophobe 133-6 



Phototropism 111 



Phycobilin 108 



Phylloidy of bracts 109 



Phyllotaxis 94 



Physical models 151 



Physiology 1, 5, 24 



Phytochrome: action of 124, action 

 spectrum 104, 121-2, 218, Cheno- 

 podium 121-2, decay 137-8, enzy- 

 matic role 108, extraction 106-8, 

 flower initiation 109, Japanese 

 morning glory 120-1, molecules per 

 cell 125, nature of 108, 203, photo- 

 periodism 130, protein 107, reaction 

 32-3, 106, responses 109-11, rever- 

 sibility 105-6, study of 83, timing 

 136-9, 146 



Phytotron 73 



Picolinic acid, 172, 175-7 



Pigment conversion 144 



Pigments 100 



Pigment system of photoperiodism 

 {see phytochrome) 7, 32, 42 



Pigment systems other than phyto- 

 chrome 111-2 



Plant distribution and response type 39 



Plasticity of response 40, 43-5 



Plumularhook 104-5, 109, 112 



Pollination 44 



Preparing plants for experimentation 

 77 



Printanisation 47 



Prisms 82 



Proline 172 



Promotion of flowering 170, 173 



Protein 186, 202 



Qualitative (absolute) response 1 1 , 17-8 

 Quantitative response 11, 12, 16 

 Quercetin 171, 174 



Rate of: change in day length 36, 

 development of floral bud 89, 192-3 

 Reaction rate clock 136-7 

 Reciprocity 30, 113 



Reducing substances 196 



Relaxation oscillator 151 



Reproductive: cycles 131, growth 63, 

 organs 197, organs in Bryophytes 109 



Reserve foodstuff" 97 



Resetting the clock 99, 117, 139, 141-2 



Respiration 99, 128, 148, inhibitors 

 173 



Response types 43, 203 



Rest period 69 



Reversible photoreaction (see phyto- 

 chrome) 105-6 



Reversion to vegetative condition 

 194-5 



Rhythmic motions 6, 127 



Rib meristem 200-2 



Riboflavin 111 



Ribonucleic acid (RNA) 58, 202, syn- 

 thesis 175, 198, 216 



Ripeness to flower 10, 64, 67, 93-7 



Root: growth 109, pressure 129 



Russian biology 64 



Safelight 81 



Salt mines 149 



Satellite, artificial 149 



Saturation 113, 143, 158-9, 170, in- 

 tensity 29-30 



Second high intensity light process 

 186-90 



Seeds 73, moist 53 



Sensitivity to induction 159-62 



Sex determination 109 



Short-day: plants 4, 5, 11, 16-7, 35, 

 39, 44, 59, 209-12, response 14 



Short-long-day plant 12, 17,214-5 



Single-celled organisms 150 



Site of perception of: cold 51, light 153 



Skotophile 133-6 



Size of the nucleus 130 



SK&F7997 171 



Soil moisture 5 



Soil nutrients 76 



Solar spectrum 26 



Solutions of ethyl alcohol 83 



South pole 149-50 



Southern Hemisphere, shipping bulbs 

 to 68 



Speciahzation 197 



Spectrophotometer 107 



