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The physiology of plant tolerance to low phosphorus availability

Loneragan, J.F. (2015) The physiology of plant tolerance to low phosphorus availability. In: Jung, G.A., (ed.) Crop Tolerance to Suboptimal Land Conditions. John Wiley & Sons Inc., pp. 329-343.

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Plants vary widely in their abilities to survive, to grow, and to produce at low levels of phosphorus in soils. These variations among plants result from differences in their abilities to absorb and to utilize phosphorus in relation to their requirements for growth and development. This chapter reviews the behaviour of phosphorus in these processes giving special attention to the way in which it may limit the plant's use of phosphorus under conditions of low phosphorus availability. The effect of both ectotrophic and endotrophic mycorrhizae in promoting phosphorus absorption can be quite large. In general, the relative effects of mycorrhizae are most marked at low and intermediate levels of phosphorus availability. Plant cells contain appreciable quantities of both inorganic phosphate ions and organic phosphorus compounds. The quantities of inorganic phosphorus vary widely with phosphorus supply while those of organic phosphorus remain relatively constant but vary with age and nature of the cells.

Item Type: Book Chapter
Murdoch Affiliation(s): School of Environmental and Life Sciences
Publisher: John Wiley & Sons Inc.
Copyright: © 2015 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
Other Information: ASA Special Publications; Vol. 32
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