Subject Index 



— 195- 



Vernalization and Photoperiodism 



— , tobacco 66 ct seq. 



— , tomato 43, 51 



— , see also table, p. 80 



Inheritance of flowering response, see 



Genetics 

 Intermediate photoperiod 43, 75 

 Intermediate plants, phenology 104 

 — , bean 43, 75 

 — , Eupatorium 43, 75 

 — , Mikania 43, 75 

 — , sugarcane 43, 75 



Length-of-day (see Photoperiodism) 

 Light intensity, effect on, photoperiod 43, 

 47, 52, 64, 71-74 



, phototemperature 154-157 



Long-day plants, defined 40, 43 



— , diurnal rhythms of 170-172 



— , genetics of 176, 186 



— . phenology of 103 



— , requirements for 64, 168 



— , aster 69 



— , barley 45 et seq. 



— , beet 49 



— , Benzoin 115 



— , BoUonia 45 



— , Botitelotta 44 



— , castor bean 53 



— , daisy 45 



— , eggplant 138 



— , flax 133 



— , gram 126 



— , Hibiscus 115 



— , Hyoscyamus 67 et seq. 



— , lettuce 43 



— , pea 136. 140 



— , phlox 45 



— , Physostcgia 45 



— , potato 43, 44, 112 



— , radish 43 



— , rice 122, 161 



— , Riidbcckia 43, 49, plate 7 



— , Sedtim 56 



— , spinach 43, 160 



— , sugar-beet 49, 185 



— , wheat 45 et seq. 



— , see also table p. 80 



Metabolism, relation to photoperiod- 

 ism 83-90 

 — . relation to vernaHzation. vii 

 Migration, controlled by photoperiod 111 

 Mineral pattern, changes with flowering 

 97 



Nitrogen, effect on, flowering 58, 83- 

 91, 127 



, fruiting 84 



Nutrition, relation to photoperiodism 83- 



90 

 Nyctotemperature 154-157 



Parasites, vii 



Phasic development 3. 7, 99 

 Phenology, of day-neutral plants 103 

 — , of intermediate plants 104 

 — , of long-day plants 103 

 — , of short-day plants 103 

 — , role of day length 103, 129-143 

 Photoperiodic, adaptation, 40, 44, 46, 124, 

 127 



— aftereffect 17, 40, 97 

 — , classification 42-46 



— , factor of climate 103-119 



— , induction 40, 51 



— , inhibition, (of flowering) 54, 66, 71- 



77 



, (of growth) 40, 86, plates 6 and 7 



— , perception 42, 53, 63-65 



— , response, localization of 63, 96 



, persistance of 66 



, transport of 42, 56, 65-67, % 



— , variability 44 



Photoperiodism, action spectrum for 71- 



77 

 — , adaptive change 40, 44, 124, 127 

 — , defined 40 

 — , discovery of 41 

 — , effect on, auxin 81 



, bulbing 50 



, carbohydrates 85 



, climbing liabit 114 



, competition 113 



, crop distribution 112 



, dormancy 48 



, enzyme activity 87 



, nitrogen 85-89, 127 



, phenology 129-143 



, phytogeography 43, 110-119 



•, pigments 85 



— — , pollen sterility 124 



, sex determination 93 



, stem elongation 58, 72 



, tillering 127 



, vegetative growth 42, 87 



, yield 122, 126 



— , geologic changes 101-119 



— , history of 39-60 



— , in tropics 121-127, 161-166 



— , light sensitivity of 43, 47 



— , mechanism of 53-58, 160-162 



— , reversibility 81, 97 



— , role of, age 45 



, carbohydrates 85-89 



, dark period 48, 51, 64 



, genetics 39 



, leaf acidity 160 



, leaves 42, 54, 63-69 



, light intensity 52, 64, 71-74 



, metabolism 83-90 



, nitrogen 83-89, 127 



, nutrition 83-90 



, photosynthesis 54, 84, 85 



, respiration 160 



