886 



SUBJECT INDEX 



Auxin (Continued) 



interaction with red and far-red 



radiations, 181, 186-195 

 postinductive and preinductive 

 effects in flower initiation, 340 

 A vena 



coleoptile length, 1 26 



decrease by irradiation, 126 

 de-inhibition by near infrared, 



126 

 effect of light regime on, 126 



Bat 



activity rhythms in, 799 

 Birds 



bobwhite quail, 751-757 

 gallinaceous, 751-757 



photoperiodism in, 751-757 

 photoperiodic control of annual 



gonadal cycles in, 717-740 

 photoperiodism in, 751-757 

 Bobolink (Dolichonyx oryzivorus) 

 influence of different day lengths 



on the testes of transequatorial 



migrant, 759-765 

 Bombyx 



critical photoperiod of, 621 

 effect of temperature on, 618 



the photoperiodic response of, 

 618 

 Breeding; see also Refractory period 

 autumnal, 643 



effect of light on, 643 



effect of environment, 644 

 effect of interruption of dark 



period, 642 

 effect of light on, 641 

 effect of moon on, 644 

 effect of muscular exercise on, 



641 

 effect of rainy season on, 643 

 effect of temperature on, 643 

 of nocturnal animals, 642 



season of, 801 



annual (Citellus), 801 

 of subterranean animals, 642 

 Breeding cycles 

 in birds, 679-713 



duration and day length, 684- 



686, 704 

 effect of drought and rainfall, 



712 

 inherent rhythm, 692, 704, 705 

 initiation by day length, 682- 



684,703 



regulation in Tropics, 708-713 



role of light and darkness, 704 



summation hypothesis of, 682, 



686, 687, 689, 708, 712 



Buds; see also Floral bud 



photoperiodism in, 73, 82-85 



Carbohydrate 



translocation of, 416 

 Carbon dioxide 



dark fixation of, 291,293 

 induction of fixation, 296 

 metabolism, 289, 293, 295, 298 

 effect of interrupting long dark 



period on, 293 

 effect of prolonged dark on, 



293, 295 

 effect of prolonged light on, 



293,295 

 of short-day plants, 289, 295, 

 298 

 organic acids formed by dark fixa- 

 tion of, 298, 299 

 production in light, 292 

 Carotenoids, 25, 28 

 Cell division 



rhythm of, 571-573 

 Chemical control 



of flowering, 352, 355, 356 

 of growth, 355, 356 

 Chickens, 787, 788 



