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Application of split-root technique in orthoposphate absorption experiments

Published online by Cambridge University Press:  27 March 2009

Y. P. Kalra
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Summary

The absorption and translocation of phosphate by roots of intact seedlings of rape, oats, flax and buckwheat were studied. Two hydroponic experiments were conducted in the greenhouse. A split-root technique was used in which a single root of the culture plants was grown in one solution and the rest of the roots in another solution in a twocompartmented glass jar.

The presence of other nutrients had a favourable effect on root growth and was essential for efficient phosphate absorption. There was a positive relation between the extent of root growth and phosphorus uptake. On the basis of unit weights of a single root, rape was not any better than oats and buckwheat. A single root of rape, in the presence of other nutrients, absorbed two-thirds of the phosphorus absorbed by all the other roots, whereas single roots of buckwheat, oats, and flax were much less efficient than the rest of the roots. In the absence of other nutrients, single roots of buckwheat, rape and oats absorbed 4·61, 0·18 and 3·49%, respectively, of the phosphorus supplied. However, in the presence of other nutrients, the corresponding values were 21·68, 43·86, and 7·62%, respectively. Both in the presence and absence of other nutrients the single root of flax did not absorb phosphorus from solutions high in phosphate. The results indicate that the age of the plant has an important bearing on the uptake and translocation of phosphorus.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 77 , Issue 1 , August 1971 , pp. 77 - 81
Copyright
Copyright © Cambridge University Press 1971

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References

Bouma, D. (1967). Nutrient uptake and distribution in subterranean clover during recovery from nutritional stresses. I. Experiments with phosphorus. Aunt. J. biol. Sci. 20, 601–12.Google Scholar
Chase, G. D. & Rabinowitz, J. L. (1965). Principles of Radio-isotope Methodology. Minneapolis, Minn: Burgess Publishing Company.Google Scholar
Crossett, R. N. (1968). Effect of light upon the translocation of phosphorus by seedlings of Hordeum vulgare (L.). Aust. J. biol. Sci. 21, 225–33.CrossRefGoogle Scholar
Dimmer, H. J. (1937). A quantitative study of the roots and root hairs of a winter rye plant (Secale cereale). Am. J. Bot. 24, 417–20.Google Scholar
Ehrlek, W. L., Lanoe, A. H. & Hamner, K. C. (1958). The effect of nutrient balance on the uptake-transport of calcium and phosphorus by bean plants Proc. Am. Soc. hort. Sci. 72, 365–69.Google Scholar
Kalra, Y. P. (1965). A study of the phosphate feeding habits of plants. Ninth Annual Manitoba Soil Science Meeting, Winnipeg, 1965.Google Scholar
Kalra, Y. P. (1971a). Different behaviour of crop species in phosphate absorption. Pl. Soil. (In the Press.)CrossRefGoogle Scholar
Kalra, Y. P. (1971 b). Phosphorus uptake by plants as influenced by level of indigenous phosphorus, width of fertilizer band, and phosphate carrier. Agrochimica. (In the Press.)Google Scholar
Kalra, Y. P. & Sopeb, R. J. (1968). Efficiency of rape, oats, soybeans, and flax in absorbing soil and fertilizer phosphorus at seven stages of growth. Agron. J. 60, 209–12.CrossRefGoogle Scholar
Kasai, Z. & Asada, K. (1959). Translocation of mineral elements in the higher plants. X. Behaviour of phosphorus absorbed at each stage of growth in the ripening of the rice plant. J. Sci. Soil Manure, Tokyo 30, 479–82.Google Scholar
Lambert, R. G. & Linok, A. J. (1964). Comparison of the uptake of P32 and K12 by intact alfalfa and oat roots. Pl. Physiol., Lancaster 39, 920–4.CrossRefGoogle Scholar
Leonce, F. S. & Miller, M. H. (1966). A physiological effect of nitrogen on phosphorus absorption by corn. Agron. J. 58, 245–9.CrossRefGoogle Scholar
Machlis, L. & Torrey, J. G. (1956). Plants in Action: A laboratory manual of plant physiology, p. 44. San Francisco: W. H. Freeman.Google Scholar
Soper, R. J. & Kalra, Y. P. (1969). Effect of mode of application and source of fertilizer on phosphorus utilization by buckwheat, rape, oats, and flax. Can. J. Soil Sci. 49, 319–26.CrossRefGoogle Scholar
Wilkinson, S. R. & Gross, C. F. (1965). Response of ladino clover to phosphorus withdrawal from the nutrient solution. Agron. J. 57, 357–60.CrossRefGoogle Scholar