352 



Index 



Production of auxin, see Formation 

 Propagation, see Rooting 

 Proteins, auxin sources, 67 



dissociation, 181 



hydrolysis, 67, 276 

 Proteinase, 130 



Protoanemonin, synergist, 163 

 Protractor. 23, 31 

 Protoplasmic viscosity, 182 

 Protoplasmic streaming, 84, 95 

 Prune, 295, 296 

 Pubescence, 280 

 Pumpkin, 221 

 Purines, 104 

 Pyridoxine, 163 



Quinine, 92 

 Quinones, 185 



Ragweed, 303 

 Rain, 140 



Receptor^ auxin, 75, 176, 179 

 Red light, 3^, 75 

 '■iAiu^nU: test; 19, 24 

 pea gpowih effects, 38 

 morphological effects, 30 

 Reducing sugars, 132, 205 

 Regeneration, 19 

 Regulator, growth, 5, 152 

 Replacement tissue, 123 

 Resins, ion-exchange, 54 

 Respiration, 95, 126, 199 



and growth, 127, 182 

 anion, 136 



climacteric, 297 



environmental effects, 150 



fruits, 172, 249 



herbicide effect, 127, 128, 275 

 Rf values, table of, 51 

 Rhizobium, 124 

 Rhizocaline, 107 

 Riboflavin, 85, 89, 91, 98 

 Ribose-nucleic acids, 132 

 Rice, 63, 148 

 Ringing, 209 

 Ripening, 126, 249, 298 



biochemistry of, 298 



chemicals altering, 298 

 Root fonnation, 9, 11, 94, 105, 119, 124 



auxin assay use, 47 



chemicals effective, 1, 74, 204, 207 



chicory, 203 



citrus, 206, 214 



effect of buds, 213 



effect of leaves, 213 



effect of stock plant, 100, 209 



environmental factors, 211 



epinastic agents, 203 



hibiscus, 205 



methods, 207 



nutrient factors, 107, 204, 213 



polarity effect, 213 



wounding effect, 210 



x-ray effect, 209 

 Root growth, 115, 125 



auxin optima, 42, 100, 102 



sensitivity to 2,4-D, 42 

 Root inhibition tests, 41, 58 

 Root polarity, 81 

 Root tropisms, 99 

 Rose branching, 301 

 Rust, wheat, 300 



SaintpauUa, 210 

 Saliva, 152 



Salts of auxins, 189, 283 

 Salt uptake, 183 

 Scab, potato, 272 

 Schardinger's enzyme, 78 

 Scopoletin, 91, 173, 276 

 Seed, role in fruit drop, 247 

 Seed treatment, 115, 253, 261 

 effect on flowering, 115 

 effect on roots, 115 

 soybean, 260 

 tomato, 261 

 Seedless fruits, 109 

 Selectivity, 274, 280 



absorption and movement, 281 

 esters, 281, 283 

 lactones, 186 



morphological role in, 120, 275 

 pre-emergence, 289 

 respiratory factors, 128 

 Sensitivity to auxins, 117 

 Sepal enlargement, 298 

 Sex, 260 



Shadowgraph, 22, 24 

 Side-chains and activity, 156 

 Sinapis, 280 



Slip production, 257, 302 

 Slit pea test, 28, 58 



differential growth in, 29 

 environmental factors, 31 

 metallic inhibitors, 34 

 negative curvatures, 29, 33 

 sensitivity, 34 

 Soil applications, 289 

 Soils, persistence in, 195 

 Solvents, for auxins, 189, 286 

 for chromatography, 52 

 for extraction, 15 



