xii Table of Contents 



P. E. Pilet Auxins and the Process of Aging in Root 



Cells 167 



A. A. Bitancourt Pathways of Decomposition (Catabolic Lat- 



Alexandra P. Nogueira tice) of Indole Derivatives 181 



Kaethe Schwarz 



Peter M. Ray The Interpretation of Rates of Indole-3-acetic 



Acid Oxidation 199 



R. L. Hinman A Model Chemical System for the Study of 

 P. Frost the Oxidation of Indole-3-acetic Acid by Per- 

 oxidase 205 



THE SYNTHETIC GROWTH REGULANTS 



Borje Aberg Some New Aspects of the Growth Regulating 



Effects of Phenoxy Compounds 219 



G. E. Blackman A New Physiological Approach to the Selec- 

 tive Action of 2,4-Dichlorophenoxyacetic Acid 233 



Robert M. Muir Chemical Structure and Growth-Activity of 

 Corwin Hansch Substituted Benzoic Acids 249 



F. G. Teubner Relationship of Molecular Structure to Bio- 

 S. H. Wittwer logical Activity in the A'^-Arylphthalamic Acids 259 

 Jane Y. Shen 



Michael K. Bach The Uptake and Fate of C^^-labeled 2,4-Di- 

 /. Fellig chlorophenoxyacetic Acid in Bean Stem Sec- 

 tions 273 



V. H. Freed Some Physical-Chemical Aspects of Synthetic 

 F. J. Reithel Auxins With Respect to Their Mode of 

 /.. /•". Remmert Action 289 



James Bonner On the Mechanics of Auxin-induced Growth 307 



Daf^hne J. Osborne The Role of Auxins in the Control of Leaf 

 Mary Hallaioay Senescence. Some Effects of Local Applica- 

 tions of 2,4-Dichlorophenoxyacetic Acid on 

 Carbon and Nitrogen Metabolism 329 



5. M. Siegel Oxidants, Antioxidants, and Growth Regu- 

 F. Porto lation 341 



A. W. Galston The Intracellular Locale of Auxin Action: 

 Ravindar Kaur An Effect of Auxin on the Physical State of 



Cytoplasmic Proteins 355 



Kenneth V. Thimnnn Interrelationships Between Metallic Ions and 

 Noriko Takaliashi Auxin Action, and the Growth Promoting 



Action of Chelating Agents 363 



Peter M. Ray Problems in the Biophysics of Cell Growth . . 381 



B. Kessler The Effects of Decapitation and (irowtli 

 Z. ir. Moscicki Regulators on the Movement of Calcium in 



R. Bah Apricot Trees 387 



William P. Jacobs The Polar Movement of Auxin in the Shoots 



of Higher Plants: Its Occurrence and Physio- 

 logical Significance 397 



