Monographs 



W.A.JENSEN. 1972. THE EMBRYO SAC AND FERTILIZATION IN ANGIOSPERMS 

 Harold L.Lyon Arboretum, Univ. of Hawaii, 3860 Manoa Rd., Hono- 

 lulu. Harold L.Lyon Arboretum Lecture no.3« 31 pp., 14 figs. 

 $ 5.00 (paper) 



Well-illustrated review based mainly on recent ultrastructural 

 work by the author and his associates in Berkeley, and by H.F. 

 Linskens and associates in Nijmegen, Netherlands. 



16. 



R.MAKSYMOWYCH. 1973. ANALYSIS OF LEAF DEVELOPMENT 

 Cambridge Univ. Press, Cambridge, etc. Developmental and Cell 

 Biology Series 1. XIV, 109 pp., 62 figs., 6 tabs., combined in- 

 dex. £ 3.80, $ 12.50 



This is the first volume in a new series edited by Abercrombie, 

 Newth, and Torrey. It is based primarily on original research 

 carried out for over a decade on one particular object, the leaf 

 of Xanthium, and its most interesting feature is that it combines 

 morphological, cellular, and metabolic approaches, all rigorous- 

 ly quantitative in nature. Throughout the book an indirect time- 

 scale of development is used, the plastochron index originally 

 developed by Erickson and Michelini. 



The book is in two parts, each consisting of 12 brief chapters. 

 The first part deals with morphological patterns, the second 

 with physiological aspects. Some of the topics considered in 

 part 1 are leaf initiation, cell lineage in the marginal and 

 plate meristems, cell division, enlargement, and differentiation, 

 and the correlation of these processes. Part two considers, 

 among other things, DNA synthesis (thymidine incorporation), 

 chlorophyll synthesis, respiration, enzyme synthesis, and the 

 role of plant hormones in leaf development. 



The book is very well produced and illustrated. Other volumes 

 of the series are anticipated with interest. 



17. 



H.MOHR. 1972. LECTURES ON PHOTOMORPHOGENESIS 



Springer, Berlin, etc. XII, 237 pp., 219 figs., 22 tabs., subject 



index. DM 46.60, $ 14.80, £ 7.50 



The term photomorphogenesis covers much more than the develop- 

 ment of form under the influence of light: it includes phenomena 

 at all levels of analysis. In plants the phytochrome concept is 

 central to photomorphogenesis, but a really comprehensive and up 

 to date account of this concept was not available. The present 

 book admirably fills this gap. It is based on a series of 24 

 lectures given by the author in 1971 at the University of Massa- 

 chusetts; the format of lectures has been retained in the book. 

 The emphasis is on developmental physiology and on the signifi- 

 cance of phytochrome research within the area of general molecu- 

 lar biology; historical aspects were omitted unless essential. 



Every conceivable aspect of phytochrome research is duly con- 

 sidered, with emphasis on the organism used by the author and 

 his associates: the mustard seedling. The subject is discussed 

 with great authority and didactic clarity against a broad bio- 

 logical background, and the book contains much that is of inter- 

 est to developmental biologists generally. To mention a few ex- 

 amples: phytochrome-mediated enzyme induction and repression, 

 and modulation of metabolic steady states; interactions with 



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