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Title: Transport of rubidium and strontium in detached wheat shoots

Abstract

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.

Authors:
Publication Date:
Research Org.:
Univesitaet Bern, Switzerland
OSTI Identifier:
5207370
Resource Type:
Conference
Journal Name:
Plant Physiol., Suppl.; (United States)
Additional Journal Information:
Journal Volume: 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
Subject:
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

Citation Formats

Feller, U. Transport of rubidium and strontium in detached wheat shoots. United States: N. p., 1986. Web.
Feller, U. Transport of rubidium and strontium in detached wheat shoots. United States.
Feller, U. 1986. "Transport of rubidium and strontium in detached wheat shoots". United States.
@article{osti_5207370,
title = {Transport of rubidium and strontium in detached wheat shoots},
author = {Feller, U},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5207370}, journal = {Plant Physiol., Suppl.; (United States)},
number = ,
volume = 80:4,
place = {United States},
year = {Tue Apr 01 00:00:00 EST 1986},
month = {Tue Apr 01 00:00:00 EST 1986}
}

Conference:
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