SUBJECT INDEX 



291 



Genetics, 87 

 Geo-electric efifect, 165 

 Geo-growth reaction, 158, 162 

 Geotonus, 97, 98 

 Geotropic perception, 164 

 Geotropic sensitivity, 154, 163 

 Geotropism, 10, 18, 46, 61, 86, 91, 97, 



124, 142, 144, 145, 147, 152, 165- 



168, 171, 181, 207 

 Geotropo-hormone, 158, 184 

 Germination and auxin content, 63 

 Glass holder, 29, 30 

 Godetia, 211 



Gradient, auxin, 96-99, 242 

 Gradient, metabolic, 92, 241, 242 

 Grafting, 219 

 Grand period, 23 

 Grass nodes, 161 

 Gravity, 60, 92, 97, 98, 142, 154-166, 



183, 186, 245 

 Griffithsia, 241 

 Growth, definition of, 119 

 Growth enzymes, 8, 9 

 Growth hormone, definition, 4 

 Growth-inhibiting substances, 19, 42, 



45, 128, 129, 143, 154, 178, 207, 



208, 213 

 Growth of roots, 56, 85, Ul-lSO 

 Growth promoting substance, 12, 13, 



19, 24, 26, 42, 45, 53, 105, 154, 



213 

 Growth regulator, 4, 12, 153, 155 

 g.s. (growth substance), 4 

 Guttation, 28 

 Gynostemium, 228 



Heat treatment, 83, 84, 87 

 Hehanthus, 26, 58, 60, 62, 64, 82, 84, 



85, 88, 124, 149, 161, 174, 180, 187, 



191, 211, 219,220, 224 

 Heliotropic machine, 245 

 Hemicellulose, 124, 127 

 Hen, 70, 71 

 Hetero-auxin, 110 

 Hibiscus, 204, 228 

 Hicoria, 63 



Homogentisic acid, 164 

 Hordeum, 63, 86 

 Horizontal microscope, 51 

 Hormone, definition, 3 

 Humidity, 28 



Hydration of protoplasm, 130 

 Hypocotyl, 21 



Ilex, 204 



Impatiens, 186, 194, 198 



Inactivation of auxin, 42, 57, 58, 65, 



72, 86-89, 105, 112, 128-130, 136, 



146, 147, 163, 172, 175, 179, 206, 210 

 Inactivation, spontaneous, 109 

 IndoIe-3-acetic acid, 42, 51, 72, 110- 



112, 142, 175, 190, 195, 210, 220, 



221, 224, 225 

 Indole compounds, 112-116, 132-140 

 Inositol, 196, 236 

 Interface, 102 

 Interferometer, 51 

 Internal factor for root formation, 



199-202 

 Intracellular activators, 236 

 Intumescences, 192, 226 

 Intussusception, 120, 123, 126 

 Ionization of the air, 50 

 Ipomoea, 58, 62 

 Irritation, 10, 11 



Isoelectric point of protoplasm, 130 

 Isolated roots, 146, 150, 162 



Key, simile of, 118, 134, 135 

 Kohl-rabi, 18 



Labiatae, 158 



Lactone of auxin a, 106, 1 10 



Lanoline paste, 37, 191, 204, 210, 214, 

 223 



Latente Reizbarkeiten, 244 



Latent time, 244 



Lateral transport, 46, 91, 98, 136, 157, 

 163, 169, 171 



Layering, 206 



Leaf, auxin production in, 61, 62, 69, 

 148, 203, 213, 219 



Leaf growth, 66, 227 



Lemon, see Citrus 



Lepidium, 60 



Lepto-hormone, 18, 221 



Light, effects of, 60, 66, 88, 89, 98, 

 166-178, 192-194, 245 



Light-growth reaction, 101, 104, ni- 

 ne 



Light-sensitive system, 170 



Lignification, 224 



Limiting factor, 45, 198, 199, 236-239 



Linum, 211 



Load-extension apparatus, 124 



Long reaction to light, 174 



Lupinus, 60, 66, 69, 73, 75, 84, 97, 

 141, 154, 159, 165, 187 



