85. 



J.HESLOP-HARRISON, ed . 1971. POLLEN: DEVELOPMENT AND PHYSIOLOGY 

 Butterworth, London. XII, 338 pp., 82 figs., 36 tabs., author, 

 taxonomlc, and suDject Indexes. £ 7.00 



This book Is largely based on papers presented at three dif- 

 ferent meetings held in August, I969 in the U.S.A., but the 

 principal papers have been expanded to provide reviews of major 

 areas in pollen research. The book contains 11 such reviews and 

 25 abstracts of papers dealing with more specific topics. We 

 will only consider the reviews here, in so far as they deal with 

 developmental aspects. They clearly bring out the profound ul- 

 trastructural and biochemical changes that accompany the transi- 

 tion from sporophyte to gametophyte and the further development 

 of the latter. 



The book is in five sections, the first three of which are of 

 particular interest to our readers. Section one is entitled 

 Nucleus and cytoplasm in mlcrosporogenesis , and has reviews by 

 Sauter on the physiology and biochemistry of meiosis, and by 

 Heslop-Harrison on the cytoplasm and its organelles during meio- 

 sis. Section two, Pollen development and the pollen grain wall, 

 has reviews by Echlin on the role of the tapetum in mlcrosporo- 

 genesis, by Heslop-Harrison on structure and development of the 

 pollen wall, and by Shaw on the chemistry and ontogeny of sporo- 

 pollenlns. In section three. Pollen and pollen tube metabolism, 

 Stanley deals with pollen chemistry and pollen tube growth, Ro- 

 sen with tube growth and fine structure, and Mascarenhas with 

 RNA and protein synthesis during pollen development and tuoe 

 growth. 



The book is well produced, bUt it Is surprising that none of 

 the reviews dealing with ultrastructural aspects has any elec- 

 tron micrographs. 



Symposium reports 



86. 



J.F.FREDRICK and R.M.KLEIN, eds. 1970. PHYLOGENESIS AND MORPHO- 

 GENESIS IN THE ALGAE 



New York Acad.Sci., New York. Ann.N. Y.Acad .Sci . Vol.175, art . 2 . 

 368 pp., 173 figs., 59 tabs. $ 25.00 (paper) 



The algae are increasingly used for the study of certain as- 

 pects of morphogenesis and differentiation. Some of the recent 

 results of such studies are reviewed and described in parts V 

 and VI of this volume, which contains the papers read at a Con- 

 ference held in December, 1969. 



We briefly characterize the papers we consider to be ol partic- 

 ular interest to developmental biologists generally: Chemistry 

 and biochemistry of differentiation in Anabaena (blue-green al- 

 ga); Physiology and biochemistry of growth and gametogenesis in 

 Chlamydomonas; Gametogenesis and fertilization in Caulerpa (gi- 

 ant coenocytic alga); Development and regeneration in Caulerpa; 

 Ultrastructural development of the eye spot in male gametes 01 

 Fucus; Experimental cytomorphogenesis in Micrasterias (fesmld 

 alga); Histochemistry of polysaccharides in developmental stages 

 of Fucus; The physical basis of cytomorphogenesis (theoretical, 

 and experiments on Nitella); Nutritional factors in algal morpho- 

 genesis; Chemical inducers of sexual development in Volvox. 



47 



