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Light sensitivity of na, rb, and k absorption by different tissues of bean leaves
1Department of Agricultural Botany, The Hebrew University, Rehovot 76 100, Israel.
Abstract:
Autoradiographs of (22)Na-loaded bean (Phaseolus vulgaris L. cv. ;Brittle Wax') leaf slices showed that most of the tracer was concentrated in vascular tissue. Rubidium-86 was uniformly distributed in slices that had been incubated in darkness; after incubation in the light many small dark spots appeared on the autoradiographs, apparently corresponding with the stomata. Autoradiographs of (42)K-loaded slices showed a rather uniform distribution of the tracer, whether the slices had been incubated in light or in darkness.
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