848 



Subject Index 



Pteridium antheridial factor, 709, 710 

 Pteridium aquilinum 



extract of prothalli, 709 



gametophytes, types of, 716 



loss of sensitivity to Pteridium factor, 

 713 



physiology of reproduction, 719 

 Pteridium factor in archegonium-bearing 



prothalli, 712, 713 

 Pteroids, 710 

 Pulularia pullulans, 134 

 Purine 



as antioxidant, 345 



bases, 18 

 Pyridoxine, 605 

 Pyrimidine bases, 18 

 Pyrogallol as substrate, 620, 621 

 Pyrrole as antioxidant, 345, 348 

 Pyrrolidine as antioxidant, 345 



Quercetrin, 701 



Quinic acid, 699, 700 



2-Quinolones, 214 



4-Quinolones, 214 



p-Quinone 



growth regulation by, 161 

 inhibition, oxidation of lAA, 154 



Radiation, visible 



effect on internode length, 544 



growth inhibition reversal by GA, 548 



morphological effects, 543 

 Radical attack on ring, 436 

 Radioactive products of C"-labeled 2,4-D 



in bean stems, 283, 284 

 Radioactivity distribution in Ci*-2,4-D 

 treated 



Coleus, 764 



Phaseolus stems, 278, 279 



Pisum cell fraction, 358 

 Radioautograms of C'', 752 

 Radiochromatograms of 



radioactive fractions of Coleus, 763 



water-soluble fractions of Gossypiiim, 

 761 

 Radiochromatographic analyses of C'', 



175 

 Raphanus, 552 

 Rb = riboflavin, 161 

 Rb-phosphate, 154 



(Rb^Rb.2H) = redox system, 161 

 Reactive species, 213 

 Receptor in auxin response, 222 

 Redox catalyst = (ROH), 162 

 Redox system = (Rb^Rb.2H) 

 Regeneration, acceleration by reductants, 



347 

 Regulator-antioxidant hypothesis, 341 

 Resorcinol 



cofactor in oxidation of lAA, 151 



growth regulation by, 161, 162 



oxygen uptake, effect on, 157 

 Respiration 



coleoptile section, 135 



germinating Lactuca seeds, 742 



role in auxin induced growth, 323 

 Response curves in Avena curvature test, 



412 

 Retardation, mechanism of 



chain-transferring agents, 160 



lAA oxidation, 155 



in dark and light, 164 

 Retarders of oxidation of lAA, 154 

 Retarding effect, 160 



Reversible inhibition, 127 



R, values 



of Coleus metabolites, 762 



of aj-(indole-3-)alkanecarboxylic acids, 



73 

 of phosphorylated Gossypium metabo- 

 Ute, 762 



Rhizobium leguminosarum, 726 



Rhus typhina, 634 



Riboflavin = Rb 



growth regulation by, 161, 163 

 non-reversal of growth inhibition by 



antiauxins, 605 

 reduced, 164 



retarder of inhibition of lAA, 156, 160, 

 163 



Ribonucleic acid = RNA, 393 



Rice ^ Oryza 



RNA = ribonucleic acid 



RNase in vitro, 393 



(RO. ) == oxidized radicals 



ROH = phenolic cofactor 



(ROH) = redox catalyst 



Root growth 



GA and lAA interaction, 661 

 on excised tomato ovaries, 688 

 stimulation by tomato juice, 688, 689 

 tomato juice and sucrose interaction, 

 690 



Rosa sp., 678 



Rosette plants, stem elongation, 567, 568 



Rubus, 96 



Rubus fruticosus, 691 



Rudbeckia (LD plant), 532, 533, 535, 536, 

 537 



Rumex acetosa, 678 



Rumex virus tumor tissue culture, 676 



Salicylyn hydrazine as antioxidant, 345 

 Salkowski reactions, 193, 194, 196 



lAA metabolite, 178 



reactive spots, 188 

 Salvia splendens, 522, 525, 526, 527 

 Samolus parviflorus, stem elongation, 567, 



568 

 S-carboxymethyl N, N-dimethylaminodithi- 



ocarbamate 

 Schema, 637 

 Scopeletin 



growth regulation, 737 



retardation in oxidation of I A A, 154, 

 160 

 Scorzonera hispanica, 691, 692, 694 

 Seed growth-substance and chilling, 95 

 Selective action of 2,4-D, 233 

 Semiquinol (phenolic radical), 149 

 Serotinin as antioxidant, 346 

 Serotonin, 94 



Short-day grafts on long-day plants, 531 

 Side-chains of auxin, 453 

 Simazin, 798, 799, 800 

 Sinapis alba 



photoperiodic induction, 526 



visible radiation and GA, 551 

 Sinocalamus oldhami, 64 

 Skatole = S = Sk, 348 

 Skatole peroxy-radical, 149 

 Skoog test group C, 670 

 Slit pea stem curvature, 132 

 Sodium salt of indole-3-acetic acid = 

 NalAA, 128, 129, 130, 132, 135. 136, 

 137, 138, 139 

 Soil 



conversion of Pisum extracts by, 48 



treatment of auxins, 49 



