Transport of rubidium absorbed by the apex of the bean root.
Rubidium-86 was applied to the terminal 5.0 mm region of intact roots for a 6 hour period. The plants were then harvested after 0, 18, 24, 48, 72, or 96 hours additional growth in a rubidium-free continuously renewed nutrient solution. A substantial portion of the rubidium absorbed in a region of the root devoid of functional xylem tissue was ultimately transported to more basipetal regions.
Steward
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KK
Biological Sciences Group, University of Connecticut, Storrs, Connecticut 06268.
Koontz
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HV