EDITORS' NOTE 



The English translation of Dr. N. A. Maximov's "Textbook 

 of Plant Physiology," edited from the first and second Russian 

 editions, was widely accepted for class use. In the present fifth 

 Russian edition. Dr. Maximov has completely rearranged the 

 text, rewriting a major part of the discussion, and has intro- 

 duced new materials from the data of recent research. This 

 edition has been published under the title of ''Plant Physiology" 

 so that it will not be confused by Ubrarians and students with 

 the former edition, entitled ''Textbook of Plant Physiology," 

 by the same author and editors. The discussions, data, and 

 arrangement are so different as to make this distinction necessary. 

 This is a completely new book, bringing up to date the results of 

 plant physiological research throughout the world. The editors 

 have introduced data and viewpoints from recent American 

 pubhcations. They have also revised the discussion, par- 

 ticularly where conditions applying in Russia especially were 

 described, and thus have made the presentation of more wide- 

 spread appHcation. This text is, therefore, not just a translation 

 but a new book, based on the translation of Dr. Maximov's 

 fifth Russian text. This has necessitated the introduction of 

 the viewpoints of the editors on many subjects, thus amplifying 

 the presentation of the original author. 



New illustrations and data have been used in many cases. 

 In general, illustrations from publications in English have been 

 chosen. References for collateral reading have been introduced 

 after each chapter. These have been selected deliberately from 

 publications in English, wherever suitable discussion can be 

 found, and a few references to the classical works of plant 

 physiology in other languages have been cited. The translation 

 into English was made by Dr. Irene Krassovsky. 



R. B. Harvey, 



University of Minnesota, A. E. MuRNEEK. 



University of Missouri, 

 August, 1938. 



xi 



