SUBJECT INDEX 



Action spectrum of photoperiodism 



71-77 

 Anatomy, changes with flowering 91-100 

 — , role in, flowering 98 



, vernalization 98 



Anthesin 98 



Auxin, in seeds 10, 24 



— , influenced by photoperiod 81 



— , role in, bud dormancy 152 



, flowering vii, 55, 69, 182 



, vernalization 68 



Cambium, changes with flowering 



92-100 

 Carbohydrate-Nitrogen ratio 83, 85, 88- 



89 

 Carotene, change with, photoperiod 85 



, flowering 91 



Chlorophyll, fluorescence 76 



— , relation to vernalization 123 



— , role in photoperiodism 76 



Qimate change, theories of 102 



Climatic cycles 102 



Climbing habit, role of photoperiodism 



114 

 Competition, role of photoperiodism 113 

 Cretaceous flora 105-107 

 — , photoperiods 108 



Day-decrees 131-143 



Day length (see Photoperiodism) 



Day-neutral plants, defined 40-43 



- — , phenology 103 



— , see also Indeterminate plants 



DehydrofoUiculin 69 



Devernalization 21, 25, 51, 124 



Diurnal rhythms 162, 167-174 



Dormancy 48, 150-152, 157 



— , role of, auxin 152 



, photoperiod 48 



Drought resistance 121 



Etiolation 94 



Florigen 54, 69, 73, 81, 98, 123 

 — , see also Flowering hormone 

 Flower development, relation to tempera- 

 ture 148, plate 12 

 Flowering, effect on, anatomy 91-100, 

 plates 8, 9 and 10 



, cambium 92-100 



, histology 91-100 



, mineral pattern 97, plate 9 



, respiration 91, 160 



, roots 91 



Flowering hormone 9, 20, 53-74, 81, 96- 



98, 123, 127 

 — , evidence for 53, 63-70, 73, 127 

 — , fate of 66, 69 

 — , formation of 68-70 

 — , in parasites, vii 

 — , in vernalization 21, 68 

 — , meristem action 57 

 — , nature of 55 



— , relation to auxin vii, 55. 69, 182 

 — . transport of 56, 65-67, 96 

 Flowering induced by, acetylene 11, 56 

 — , auxin 56 

 — , ethylene 56 

 — , defoliation 68 

 — , dehydrofolliculin 69 

 — , respiration inhibition 174, 181 

 — , rubber banding 94 

 — , sugars 69, 174 

 — , temperature 69 

 — , temperature girdle 94 

 Flowering, of woody angiosperms 114 

 — , relation to, branching habit 178, 181 



, diurnal rhythms 170 



, growth 176-179, 182 



— , role of, auxin vii, 55, 69, 82 



, nitrogen 83-89 



— • — , phytohormones 98 



, pigments 76, 91, 94 



Frost resistance {see Winterhardiness) 



Genetics of photoperiodism 175-188 

 ■ — , in indeterminate plants 175, 186 

 — , in long-day plants 176, 186 

 — , in short-day plants 175, 187 

 Geologic changes of photoperiod 101-119 

 Grafting 56, 66, 67, 69, 72, 95-97, 187 



Hibernalism 7 



Indeterminate plants, defined 40 

 — , genetics of 175-176, 186-187 



• , Antirrhinum 188 



■ , bean 44, 75 



— , Bouteloua 44 

 — , buckwheat 43, 99 

 — , Chrysanthemum 45 

 — , cotton 43 

 — , cucumber 43, 59 

 • — , dandelion 43 

 — , Hibiscus 114 

 — , mustard 125 

 — , pepper 45 

 — , potato 44 

 — , rice 45, 122 

 — , squash 43 



