CAROTENOIDS 



Turnips, 300 



Turnip tops, 19-20, 294 



Turtles, 226 



Two-spotted octopus, 179 



Tyrosine and carotenogenesis, 113 



Ultraviolet fungal mutants, 116-17 



Ultraviolet light and caroteno- 

 genesis, 41 



Unsaturated fat oxidase (see lipoxi- 

 dase) 



Urea and carotenogenesis, 123 



Uredospores, 104 



Urine, 233, 248 



Valine and carotenogenesis, 43—4, 

 111-13 



Varietal differences in plants, 812 



Vegetable marrow, 298 



Venous cord blood, 232 



Vetch, 294 



Violaxanthin, 14-16, 18, 36-7, 46; 

 48, 51, 55, 129-30, 133, 

 142-4, 146, 204, 216, 223, 

 252, 259^1, 263, 266 



Violaxanthin b, 14-15, 131 



Violerythrin, 158 



Viscera of ovsters, 176 



Vitamin A, 43, 54, 107, 173-6, 219, 

 232, 241, 269-74 



Vitamin A aldehyde (see retinene) 



Vitamin A2, 272 



Vitamin C (see ascorbic acid) 



Vite, 294 



Vitelline spherules of copepod eggs, 

 167 



Vitellolutein, 168 



Vitellorubin (see astaxanthin) 



White gourd, 298 



White sapote, 302 



White turnips, 298 



Wild cherry, 306 



Wild grape, 306 



Wild rye, 294 



Wings of insects, 216, 219-20 



Winter wheat, 22 



Wintering of plants, 22 



Wood, 28 



Wood apple, 298 



Woodpecker feathers, 262 



W^oody nightshade berries, 23, 32 



Xanthemia, 233 

 Xantho-erythrophores, 207 

 Xanthophane, 260 

 Xanthophores, in fish, 207-8 

 Xanthophyceae, 130-2 

 Xanthophyll (see lutein) 

 3-Xanthophyll, 55 

 Xanthosis diabetica, 233 

 Xylem of carrots, 56 



" Y " genes in maize, 80 

 " Y " genes in silkworm, 215 

 " Y " genes in tomatoes, 80-1 

 Yam, 298, 300 

 Yam bean root, 300 

 Yarrow, 294 

 Yellow malanga, 298 

 Yellow pansy, 46 

 Yellow swedes, 298 

 Yellow turnips, 298 

 Yellowing of leaves, 22-3 

 Yew berries, 32 

 Yorkshire fog, 294 

 Yucca leaves, 203 



Water chestnut, 298 



Water cress, 294, 302 



Water hyacinth, 294 



Water melons, 25, 30, 298, 302 



Wattles of birds, 260 



Western needle grass, 294 



Western wheat grass, 294 



Whales, 168, 197 



Wheat, 19, 42-3, 66, 73-4, 81, 294 



298 

 White clover lea>^es, 82 



Zeaxanthin, 14, 16, 18, 23, 32, 36-7, 

 43, 46, 51, 119, 120, 124, 

 129, 131, 133-6, 142^, 

 162, 176, 178, 181-5, 204, 

 206, 211, 259-60, 266, 270 



Zeaxanthin dipalmitate (see physa- 

 lein) 



Zeaxanthol, 5 



Zephyreans, 166 



Zinc and carotenogenesis, 78 



Zooerythrin (see astaxanthin) 



356 



