Plants, in addition to their role as primary synthesizers of organic com pounds, have evolved as selective accumulators of inorganic nutrients from the earth's crust. This ability to mine the physical environment is restricted to green plants and some microorganisms, other life forms being direct1y or indirect1y dependent on this process for their supply of mineral nutrients. The initial accumulation of ions by plants is of ten spatially separated from the photosynthetic parts, necessitating the transport to these parts of the inorganic solutes thus acquired. The requirement for energy-rich materials by the accumulation process is provided by a transport in the opposite direction of organic solutes from the photosynthetic areas. These transport phenomena in plants have been studied at the cellular level, the tissue level, and the whole plant level. The basic problems of analysing the driving forces and the supply of energy for solute transport remain the same for alI systems, but the method of approach and the type of results obtained vary widely with the experimental material employed, reflecting the variation of the solute transporting properties which have se1ectively evolved in response to both internal and external environmental pressures.

Transport Phenomena in Plants (Outline Studies in Biology)

Science & Math

BAKER, D. A.

Biological Sciences

Springer

During the past ten years there has been a marked integration of approaches within the areas of study concerned with the translocation of assimilates in higher plants. Researchers from various fields, such as horticulture, physiology and biochemistry, have found common ground as the integrative role that phloem transport plays within the major processes of the plant has become increasingly apparent. The plethora of investigations from such a wide range of disciplines have resulted in a greatly enhanced comprehension of the fundamental processes involved in the partitioning and compartmentation of photoassimilates between source and sink tissues within plants. The aim of this book is to present students with major conceptual developments and recent research in the field, provided in a series of essays by international specialists.

Transport of Photoassimilates (Monographs and Surveys in the Biosciences)

Longman Sc & Tech

GUIA DE ASTRONOMIA: H.GUIDE TO ASTRONOMY

Reference

Language Study & Reference

EDICIONES OMEGA, S.A.

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