A. C. Leopold 

 S. L. Lam 



Bruce B. Stoioe 



Corivin Hansch 

 Robert M. Muir 



J. xian Overheek 



B. B. Stoioe 



F. H. Stodola 



T. Hay as hi 



P. W. Brian 



Charles A. West 



Yusuke Sumiki 

 Akira Kawarada 



Bernard O. Phinney 



Yusuke Sumiki 

 Akira Kawarada 



M. J. Bukovac 

 S. H. Wittwer 



C. Sironval 



M. Kh. Chailakhian 



James A. Lockhart 



H. R. Cams 



F. T. Addicotl 



K. C. Baker 



R. K. Wilson 



Roy M. Sachs 

 Anton Lans: 



Takeshi Hay as hi 



William S. Hillman 

 William K. Pitrves 



Jiro Kato 



A. W. Gals ton 

 D. C. McCune 



Table of Contents xiii 



Polar Transport of Three Auxins 411 



The Stinuilation of Auxin Action by Lipides 419 



Electronic Effect of Substituents on the Ac- 

 tivity of Phenoxyacetic Acids 431 



New Theory on the Primary Mode of Auxin 



Action 449 - 



THE GIBBERELLINS 



The Early History of Gibberellin Research . . 465 ^ 



The Chemistry of Gibberellins From Flower- 

 ing Plants 473 



Occurrence of Gibberellin A^ in the Water 

 Sprouts of Citrus 483 



Dwarfing Genes in Zea mays and Their Rela- 

 tion to the Gibberellins 489 



Relation Between Chemical Structure and 

 Physiological Activity 503 



Biological Evaluation of Gibberellins Aj, A.,, 

 Ag, and A^ and Some of Their Derivatives . . 505 



Gibberellins, Cell Division, and Plant Flower- 

 ing 521 



Effect of Gibberellins and Derivatives of 

 Nucleic Acid Metabolism on Plant Growth 

 and Flowering 531 



The Hormonal Mechanisms of Growth In- 

 hibition by Visible Radiation 543 



Acceleration and Retardation of Abscission by 

 Gibberellic Acid 559 



Shoot Histogenesis and the Subapical Meri- 

 stem: the Action of Gibberellic Acid, Amo- 

 1618, and Maleic Hydrazide 567 



The Effect of Gibberellin Treatment on the 

 Photosynthetic Activity of Plants 579 



Does Gibberellin Act Through an Auxin-me- 

 diated Mechanism? 589 



Physiological Action of Gibberellin With 

 Special Reference to Auxin 601 



An Analysis of Gibberellin-Auxin Interaction 

 and Its Possible Metabolic Basis 611 



