Transport of rubidium and strontium in detached wheat shoots

Conference · Tue Apr 01 00:00:00 EST 1986 · Plant Physiol., Suppl.; (United States)

OSTI ID:5207370

Feller, U

Rb is easily translocated in xylem and phloem (similar to K), while Sr is mobile in the xylem but rather immobile in the phloem. Wheat shoots from the field were cut 1 week after ear emergence below or above the uppermost node and incubated for 3 days standing in flasks with 2 mM rubidium chloride + 2 mM strontium chloride. In some plants the phloem flux to the ear was interrupted by steam-girdling below the ear. Rb and Sr were analyzed in the different parts of the shoots by atomic absorption spectroscopy. The Rb content in the ear depended remarkably on the treatment: 0.139 mg/ear were detected in shoots cut below the node (A), 0.015 mg/ear in shoots cut above the node (B), 0.019 mg/ear in shoots cut below the node after removing the flag leaf spread (C) and only 0.001 mg/ear in shoots cut below the node and steam-girdled below the ear (D). The Sr content was not drastically affected by these treatments: 0.278 (a), 0.317 (b), 0.356 (C) and 0.214 (D) mg/ear. These results suggest that Rb was transferred from the xylem to the phloem and translocated mainly with the phloem stream to the ear.

• Research Organization: Univesitaet Bern, Switzerland
• OSTI ID: 5207370
• Journal Information: Plant Physiol., Suppl.; (United States), Vol. 80:4; Conference: Annual meeting of the American Society of Plant Physiologists, Baton Rouge, LA, USA, 8-12 Jun 1986
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
RUBIDIUM
BIOLOGICAL LOCALIZATION
TRANSLOCATION
STRONTIUM
ABSORPTION SPECTROSCOPY
RADIONUCLIDE KINETICS
SEEDLINGS
TRACER TECHNIQUES
WHEAT
ALKALI METALS
ALKALINE EARTH METALS
CEREALS
ELEMENTS
GRASS
ISOTOPE APPLICATIONS
METALS
PLANTS
SPECTROSCOPY
550201* - Biochemistry- Tracer Techniques