Transport in Plants I

1. Front Matter

   Pages I-XIX

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2. Structural Considerations in Phloem Transport

   1. Front Matter

      Pages 1-1

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   2. Sieve-Element Structure

      • M. V. Parthasarathy

      Pages 3-38

   3. Sealing Systems in Phloem

      • W. Eschrich

      Pages 39-56

3. Nature of Substances in Phloem

   1. Front Matter

      Pages 57-57

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   2. Nature of Transported Substances

      • H. Ziegler

      Pages 59-100

   3. Biochemistry of Phloem Constituents

      • W. Eschrich, W. Heyser

      Pages 101-136

4. Phloem Transport: Assessment of Evidence

   1. Front Matter

      Pages 137-137

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   2. Mass Transfer

      • M. J. Canny

      Pages 139-153

   3. Aphids and Translocation

      • A. F. G. Dixon

      Pages 154-170

   4. Investigations with Aphid Stylets into the Physiology of the Sieve Tube

      • A. J. Peel

      Pages 171-195

   5. Phloem Exudation from Monocotyledonous Axes

      • J. Van Die, P. M. L. Tammes

      Pages 196-222

   6. Work with Isolated Phloem Strands

      • D. S. Fensom

      Pages 223-244

   7. Bidirectional Transport

      • W. Eschrich

      Pages 245-255

   8. Effects of Temperature, Anoxia and Other Metabolic Inhibitors on Translocation

      • D. R. Geiger, S. A. Sovonick

      Pages 256-286

5. Possible Mechanisms of Phloem Transport

   1. Front Matter

      Pages 287-287

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   2. Protoplasmic Streaming

      • M. J. Canny

      Pages 289-300

   3. Electroosmotic Flow

      • D. C. Spanner

      Pages 301-327

   4. Pressure Flow

      • J. A. Milburn

      Pages 328-353

   5. Other Possible Mechanisms

      • D. S. Fensom

      Pages 354-366

When WILHELM RUHLAND developed his plan for an Encyclopedia of Plant Physiol­ ogy more than three decades ago, biology could still be conveniently subdivided into classical areas. Even within plant physiology, subdivisions were not too difficult to make, and general principles could be covered sufficiently in the two introductory volumes of the Encyclopedia on the physical and chemical basis of cell biology. But the situation changed rapidly even during the 12-year publication period of the Encyclopedia (1955-1967). The new molecular direction of genetics and structural research on biopolymers had an integrating effect on all other biological fields, including plant physiology, and it became increasingly difficult to keep previously distinct areas separated. RUHLAND'S overall plan included 18 volumes and about 22,000 pages. It covered the entire field of plant physiology, in most cases from the very beginning. But, as each volume appeared, it was clear that its content would soon be outdated.

• Plant physiology
• biology
• cell
• cell biology
• phloem
• physiology
• plant
• plants
• transport

• Harvard University, Petersham, USA

  M. H. Zimmermann

• Department of Botany, University of Glasgow, Glasgow, Great Britain

  J. A. Milburn

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