890 



SUBJECT INDEX 



Fish, 652, 654-656 

 gonadotropins, 664 

 intrinsic sexual rhytlim, 657, 662 

 nuptial coloration, 653, 657, 659 

 pituitary, 664, 665 

 sexual behavior, 653, 657, 660, 



661 

 sexual cycle, 651, 657, 659, 663 



annual, 657-659 



cyprinid, 657, 658 



gasterosteid, 659 

 spawning, 653, 657, 660, 663 

 terminology of phases, 658 

 Floral bud 



development of, 382 

 initiation in Hyoscyamus, 115 

 Floral stages, 382 



Florigen; see also Flowering stim- 

 ulus; Hormone, flowering 

 Flower induction, 245, 248-252, 



373, 376, 378, 379, 411 

 active in buds, 418, 419 

 dual day length requirements, 



315,316 

 effect of far-red and red light, 



246 

 Flowering, 245, 246, 248, 249, 315, 



316, 373, 374, 376-379, 385, 



389,393-406,411,416 

 activebuds, 418, 419 

 critical night for, 382, 386, 387, 



388,390,391 

 effect of antiauxins on, 413 

 effect of auxin on, 252, 414 

 effect of azide on, 414 

 effect of cyanide on, 252, 414 

 effect of dinitrophenol on, 252, 



414 

 effect of fluoride on, 4 1 4 

 effect of gibberellic acid on, 352, 



355,356,413 

 effect of light on, 352 

 effect of malonate on, 414 



effect of metabolism of leaf on, 



414 

 effect of photoperiodism on. 352 

 effect of temperature on, 414 

 effect of thiouracil on, 414 

 and grafting, 413 

 inhibitors of, 414 

 in Hyoscyamus, 113-115, 118 



effect of wavelength, 113-115, 

 118 

 under long days, 311 



Xanthium, 3 1 1 

 partial or component processes in, 



381-383 

 relation to leaf, 413 

 stabilization of, 251, 413 

 translocation of hormone or stim- 

 ulus, 247, 250, 252, 413, 417 

 as virus disease, 417 

 Flowering stimulus, 247-252 

 Formative effects 



of high light intensities, 119-125 



in lettuce leaf shape, 1 19-125 

 of narrow spectral regions, 113- 

 127 



in Hyoscyamus, 113-119 

 Fowl, domestic, 724 



Gas exchange, 289 



effect of short days on, 290, 292 

 Germination, 89 



action spectra of, 455, 458 



dark reaction in, 427 



effect of gibberellic acid on, 35 1 



effect of light on, 9 1-98, 35 1 



effect of light on promotion and 

 inhibition of, 90, 91 



effect of light on time of imbibi- 

 tion, 90 



effect of photoperiodism on, 35 1 



implanted in Xanthium petioles, 

 301 



induction of, 450 



