Role of Roots and Shoots of Soybeans in Tolerance to Excess Soil Zinc1
- M. C. White,
- R. L. Chaney and
- A. M. Decker2
Reciprocal grafts were used to determine the relative importance of the roots and shoots of soybean (Glycine max L.) in tolerance to excess soil Zn. Grafts, in all combinations, were made between ‘Wye’ (Zn-tolerant) and ‘York’ (Zn-intolerant) soybean cultivars. For plants grown at soil pH 6.2 and soil Zn additions of 1.31, 131, and 393 ppm, the results showed that the scion genotype controlled relative Zn tolerance, while the rootstock genotype controlled Zn absorption and translocation. Differences in foliar Zn concentrations were not responsible for differential Zn tolerance of these two soybean cultivars.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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