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In view of the recent comprehensive reviews by Robertson (13) and by Hewitt (4) and because of the fact that detailed annual coverage of the sub ject is readily available in abstract form, it was felt desirable to confine this article largely to the basic feature of mineral nutrition, namely, ion absorp tion by roots. Understandably, over the past 30 years there has been a growing interest in the process of mineral absorption by plant cells. From the point of view of practical agriculture, the absorption reactions are intimately tied up with nutritional and toxicity problems in connection with the growing of crops in soil. Also, since the process frequently involves the accumulation of elements in cells against gradients in chemical potential, the phenomenon of ion ab sorption is of considerable theoretical interest. Just as photosynthesis in plants has aroused the curiosity of physiologists and chemists in that it rep resents a transformation of radiant energy into chemical energy, so also is ion absorption of interest because apparently it involves a transformation of chemical energy into osmotic energy. As the study of mineral uptake by plant and animal cells has progressed over recent decades, theories and mechanisms designed
Annual Review of Plant Biology – Annual Reviews
Published: Jun 1, 1952
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