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BOOK REVIEWS
The various chapters are organized into six parts, dealing with nitrate uptake, nitrate reduction, nitrite reduction, regulation of nitrate assimilation, applied aspects and comparative aspects. Nitrate uptake (Chapters 1 and 2) and nitrate reduction (Chapters 3-14) consider the molecular and genetic aspects of nitrate uptake in higher plants (microorganisms being treated in further chapters) and nitrate reduction (including the role of the molybdenum cofactor) in microorganisms and higher plants. The structure, immunology and genetics of nitrate reductase are studied among various organisms. Nitrate reduction is considered in E. coil (Chapter 15) and higher plants (Chapters 16-18) including studies on the spinach ferrodoxin-nitrite reductase and nitrite reductase. Regulation of nitrate assimilation is
dealt with in Chapters 19-21 in terms of regulation genetics and molecular analysis. Finally, the applications of fungal and plant biotechnology are discussed in terms of nitrate assimilation. The book ends up with a comparison of amino acid sequences between bacterial, fungal and plant nitrate reductase and nitrite reductase proteins. This book provides a very strong basis for the understanding and exploitation of nitrate assimilation in the different organisms and should serve as a reference for all those working in this field.
Diagnosis of Mineral Disorders in Plants, Vol. 2: Vegetables: Alan Scaife and Mary Turner. Edited by J. B. D. Robinson. Her Majesty's Stationery Office, London. 1983. 96 pp. ISBN 0-11-240804-4. Price $34.25 plus postage and handling.
An atlas of 237 colour plates depicts and comments the various aspects of the deficiencies or toxicity symptoms. The critical concentration of each element in leaves, and treatments as recommended by the British Ministry of Agriculture, for prevention and cure of the corresponding disorder, are discussed. Volume 1 of the series deals with the methods used in the diagnosis of mineral disorders, while potato and tomato crops will be dealt with in succeeding volumes. The present book will be highly valuable to all those concerned with vegetable growing in a context of changing practices, mineral nutrition and pesticide treatments.
This beautifully illustrated book presents the symptoms of mineral disorders of the most important vegetable species including various brassica, broad bean, carrot, celery, leek, lettuce, marrow, onion, parsnip, pea, beans, radish, red beet, spinach, sweet corn and watercress. Deficiencies in nitrogen, phosphorus, sulphur, potassium, calcium, magnesium, iron, manganese, zinc, copper, boron, molybdenum and chlorine are discussed together with toxicity in sulphur, manganese, boron, aluminium and chlorine. Leaf sampling for laboratory analysis and quick sap tests for field use are presented.
Plants Under Stress: Edited by Hamlyn G. Jones, T. J. Flowers and M. B. Jones. Society for Experimental Biology, Seminar Series, 39. Cambridge University Press, Cambridge, U.K. 1989. 257 pp. ISBN 0521-34423-9. Price $65.00. Much progress has been made recently in under-
JEAN SEMAL Faculte des Sciences agronomiques B-5800 Gembloux Belgium
JEAN SEMAL Faculte des Sciences agronomiques B-5800 Gembloux Belgium
standing how stresses affect plants by modifying their functions, performances and relations with their environment. The material presented in this book is up-todate, although it merely assembles the contributions of 23 participants to the meeting of the Environmental Physiology Group of the Society