heterogeneous collection deal in some way with development. That by Thom on gradients 

 in biology and mathematics is probably only understandable for mathematicians, and that 

 by Wolpert on positional information brings nothing new. The paper by Robertson and 

 Cohen on slime mould development is the only one that has considerable body, although 

 it is essentially a progress report. 



Other papers deal with a two-cell model, with population dynamics, and with models 

 of large-scale nervous activity. 



PLANT DEVELOPMENT (general) (see also 3,4) 



Textbooks 



13. 



S. S. BHOJWANI and S. P. BHATNAGAR. 1974. THE EMBRYOLOGY OF ANGIO- 



SPERMS 



Vikas Publ. House, Delhi, etc. XII, 264 pp., 170 figs., 19 tabs., combined taxonomic and 



subject index. Rs 24 (paper) 



This text is primarily intended for B.Sc. courses in India but it could be very useful to 

 more advanced students and teachers. It is the first comprehensive book on the subject in 

 English. The treatment is didactically clear and up to date. 



The major topics covered are the development of gametophytes, pollination and 

 fertilisation, development of endosperm and embryo, polyembryony, apomixis, and seed 

 development. A valuable feature is a chapter on experimental and applied embryology. 

 Experimental findings are also treated elsewhere if appropriate. 



The numerous good Une drawings and diagrams have explanatory captions. Some 

 photographs are also included. All chapters have a brief list of further readings. 



14. 



D. HESS. 1975. PLANT PHYSIOLOGY; molecular, biochemical, and physiological fun- 

 damentals of metabolism and development 



Springer, Berlin, etc. XVI, 333 pp., 248 figs., 11 tabs., subject index. DM 36.30, $ 14,80 

 (paper) 



This is the English translation of a German text first published in 1970 and favourably 

 reviewed m Gen. Embryol. Inf. Serv. 75, 2, 1974. It has been well received in Germany. 

 Its outstanding feature is the integrated treatment of both general and developmental 

 physiology from the point of view of molecular biology. 



The text has been slightly updated here and there. Although the translation is not 

 entirely faultless and was apparently not checked by the author, it reads well and there 

 are no outright mistakes. The illustrations have gained by the larger format. The extensive 

 reading list has not been updated. 



15. 



A. C. LEOPOLD and P. E. KRIEDEMANN. 1975. PLANT GROWTH AND DEVELOP- 

 MENT. 2nd. edit. 



McGraw-Hill, New York, etc. XIV, 545 pp., 413 figs., 41 tabs., subject index. $ 17.95, 

 £9.00 



Contents (abbreviated): I. Assimilation and growth (3 chs.), II. Growth regulation 

 (6 chs.), III. Development (5 chs.), IV. Ecological physiology (3 chs.), V. Chemical 

 modification of plants (1 ch.) 



This text was first published in 1964 but has now been substantially revised and 

 expanded. Both authors are horticulturists; the second author is particularly responsible 

 for parts 1 and IV. Their philosophy is to confront the student with the actual experi- 



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