Vernalization and Photoperiodism 



•196- 



A Symposium 



, temperature 42, 48-51, 129-143, 153, 



165 



, translocation 84 



, wave length 47, 53, 71-77, 79-82 



Photophile phase 169 



Photosynthesis, role in photoperiodism 54, 

 84, 85 



Phototemperature 154-157 



Photothermal induction 40 



Phytogeography, austral-boreal relations 

 110 



— , origin of herbs in 105-111 



Phytohormones, role in flowering 98 



— , see also Auxin and Flowering hor- 

 mone 



Remainder indices 133 



Respiration, change with flowering 91, 



160 

 — , inhibition inducing flowering 174, 181 

 Roots, change with flowering 91 

 • — , relation to temperature 147 



Short-dav plants, defined 40, 43 



— , diurnal rhythms in 170-171 



— , genetics of 175, 187 



— , geologic origin 108 



— , phenology 103 



— , requirements for 64, 167 



— , bean 44 



— , Bidens 113 



^, Bougainvillca 114 



— , Bouteloua 44 



— , Chrysanthemum 43 



— , Cineraria 45 



— , Cosmos 43, 93, 113 



— , cotton 126 



— , jute 126 



— , Kalanchoe 56, 85 



— , Perilla 64 et seq. 



— , poinsettia 43, 49, 104, 114 



— , potato 44, 112 



— , ragA\'eed 113 



— , rice 45, 122, plate 11 



— , Salvia 43, ^ 



— , soybean 43 et seq., plates 5, 6, 7 and 



10 

 — , strawberry 45 

 — , sugarcane 126 



— , tobacco 43 et seq., plates 5 and 8 

 — , Xanthium 50 et seq., plate 9 



, see also table p. 80 



Skotophile phase 169 

 Stem plasm theory 5 



Temperature, annual cycle 145-153 



— , diurnal cycle 153-157 



— , relation to, dormancy 150-152, 157 



, drought resistance 121 



, etiolation 94 



, flowering 69, 94, 121, 146-157 



, flower development 148 



■ , growth stages, 146-157 



. photoperiod 42, 48-52, 129-143, 153, 



165 



, root growth 147 



— , response, role of sugar 4 



, time of 1, 12, 35 



Tertiary flora 107-113 

 — , photoperiod 108 

 Thermoperiodic adaptation 40 

 Thermoperiodicity 40, 51, 145-157 

 Thermo-photoperiodic induction 40 

 Tillering, effect of, photoperiod 127 

 , vernalization 123 



Vernalization 1-37, 67-68, 99, 121-127, 



150-152 

 — , before maturation 1, 12, 33, 126 

 — , by high temperature 121 

 — , by hormones 10 

 — , effect on, anatomy 99 



, biochemical changes 13, 126-127 



, chlorophyll 123 



, dormancy 150 



— ■ — , tillering 123 

 , yield 15, 122-123 



— — , winterhardiness 11, 13 

 — , in tropics 121-127 



— , locus of 23 



— , of, buds 150-152 



, excised embryos 23, 67 



, barley 7, 18, 26 



, daffodils 28 



, gram 31, 125 



, Hyoscyamus 67 



, Iris 28 



, lentils 14 



, lily 28 



, lupine 14 



, millet 15 



, mustard vi, 16, 29, 124-125 



, oats 16, 18, 26, 29 



, rice 31, 121-123 



, rye vi. 4, 12, 19, 22. 35 



, soybean 17, 126 



, sugar beet 5, 29 



, turnip 16 



, wheat 1-37, 123-124 



— , reversal of vi, 21, 25 

 — . role of, auxins 10, 68 



, endosperm 22, 68 



■ , flowering hormone 21, 68 



, genetics 22, 185-188 



, internal factors 23 



. metabolism, vii 



— — , photoperiod 16, 19, 122-124 



Wave length of photoperiodism 47, 53, 



71-77, 79-82 

 Winterhardiness 16 

 • — , effect of vernalization 11, 13, 16 



Xanthophvll, change with photo- 

 period 85 

 , flowering 91 



