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A comparison of mineral uptake and translocation by above-ground and below-ground root systems of Salix syringiana

NALINI M. NADKARNI and RICHARD B. PRIMACK
Plant and Soil
Vol. 113, No. 1 (January (I), 1989), pp. 39-45
Published by: Springer
Stable URL: http://www.jstor.org/stable/42937728
Page Count: 7
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A comparison of mineral uptake and translocation by above-ground and below-ground root systems of Salix syringiana
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Abstract

Nutrient uptake and translocation by above-ground adventitious roots and below-ground roots of woody Salix syringiana saplings were studied with gamma spectrometry. Each of four radionuclides (⁷⁵Se, ¹³⁸Cs, ⁵⁴Mn, and ⁶⁵Zn) administered to adventitious and belowground roots were detected in stems and leaves within one month. Nuclides tended to be immobilized in the leaves and branches closest to the adventitious roots that absorbed them, while nuclides absorbed from below-ground sources were distributed more evenly throughout the plant. The capacity of adventitious roots to acquire nutrients from above-ground sources suggests they function as a potential 'auxiliary' pathway of nutrient uptake and might enhance plant nutrient status where below-ground root uptake is hindered by adverse soil conditions.

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