Genetic differences in phosphorus absorption among white clover populations |
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Authors: | J. R. Caradus |
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Affiliation: | (1) Agricultural Botany Department, Reading University, RG6 2AS Reading, UK;(2) Present address: Grasslands Division, DSIR, Palmerston North, New Zealand |
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Abstract: | Summary Eight semi-natural white clover populations and two cultivars were grown in culture solutions containing 10 ppm and 0.01 ppm phosphorus (P). The rate of P uptake by the intact plants was then measured in solutions containing 10 ppm P.Phosphorus uptake per unit root length was twice as great by plants previously grown at 0.01 ppm P than those grown at 10 ppm P. Large differences in total P uptake were found among populations regardless of the pretreatment; most of this variation was accounted for by differences in root length. Only small differences were found between populations for P uptake per unit root length, and then only after pretreatment with 10 ppm P; this variation was largely accounted for by relative growth rate and shoot %P. |
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Keywords: | Clover Phosphorus Populations Root Shoot Trifolium repens White clover |
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