Index 



351 



rooting, 119 

 spray injury, 291 

 Pea root test, 39, 41, 53, 58 

 Pea test, see Slit pea test, or Straight- 

 growth test 

 Peach, 111,235,237,246,252 



fruit growth, 295, 296 

 Pear, 232, 240 



fruit drop, 246, 252 

 Pectin esterase, 300 

 Pectin methylesterase, 243 

 Pectinase, 130 

 Pedicel thickening, 298 

 Peduncle elongation, 257 

 Penetration, see Absorption 

 Pelleted herbicides, 290 

 Penicillium, 299 

 Pepper, 111 



fruit set, 126, 221 

 Peppermint, 123 



oil, 71 

 Pepperwort, 147, 278 

 Perchloric acid, 47 

 Permanganate, 207 

 Peroxidase, 14, 87, 89 

 Peroxide, 15, 90 



Persistence of auxins, 124, 193, 200, 286 

 abscission effect, 195 

 in cotton, 194 

 in soils, 195, 200 

 pre-harvest drop effect, 195 

 Phenols, 231, 233, 236 

 herbicides, 292 

 product of auxins, 156 

 solvent, 51 



uncoupling agents, 126 

 Phenoxyacetic acid, 155, 168 



Rj values, 51 

 Phenoxyethyl acids, 285 

 Phenylacetic acid, 29, 71. 157, 299 

 callus formation, 120 

 movement, 71, 120 

 R, values, 51 

 Phenylbutyric acid, 165, 168 

 Phloem, 119 



auxin transport in, 81 

 destruction, 120, 275 

 flower stimulus in, 254 

 Phosphatase, 276 

 Phosphate acceptors, 298 



high energy, 67, 129 

 Phosphorylase, 129, 130, 131, 182 

 Phosphorylation, role in auxin toxicity, 

 136 

 role in water uptake, 129, 184 

 Phosphorus, movement effect, 143 



Photoperiodism, 101, 253, 259 

 auxin formation, 75 

 carbohydrate effects, 212 

 rooting effect, 211 

 Photosynthesis, 124, 143 

 Phototropism, 5, 6, 8, 85, 96 

 action spectrum, 86, 97 

 auxin destruction factor, 97 

 auxin formation factor, 97 

 pigment, 98 

 Phthalamic acid, 163, 186. 219 

 Phycomyces, 98 

 Phytohormone, 4 

 Picrate salts, 68 

 Pigmentation. 126 

 Pigweed, 287 

 Pinching, 301 



Pineapple, 16, 62, 63, 70, 76, 107, 149, 307 

 delayed maturity, 296 

 flowering, 11. 125, 174, 193, 253, 254 

 fruit size. 257. 294. 307 

 peducle strengthening, 298 

 rooting leaves, 210 

 slip production, 302 

 Plant unit, 28 

 Plasticity of cell wall, 185 

 Polar solutions, 141 

 Polarity, 18, 81, 113,209.254 

 effect of flowering, 81. 213 

 in Avena, 81 

 in coleus, 81 

 inhibition factor. 83. 101 

 of rhizocaline, 107 

 roots, 81. 213 

 Pollen, abortion, 303 

 auxin content, 215 

 tubes, 233 

 viability, 223, 232 

 Pollination, 76, 303, 304 



environmental effects. 224 

 Polyalkylene glycols. 139. 286 

 Polypeptidase, 130 

 Polyphenol oxidase, 14. 89 

 Positive curvature, 28, 32 

 Potassium, alters diffusion, 28 



lethal effect, 136, 276 

 Potato, dormancy, 263, 266 

 osmotic changes. 183 

 sweet, 271 

 Precursors of auxin, 67, 77 

 indoleacetonitrile, 71 

 tryptophan, 68 

 zinc effect, 76 

 Pre-emergence herbicides. 195, 198 

 Pre-harvest fruit drop, 195, 242 

 Premature softening, 229 



