Chelation of trace metals in nutrient solutions

Journal Article · Sun Jan 01 04:00:00 EST 1950 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.25.4.573· OSTI ID:6446394

Heck, W W; Bailey, L F

The effect of chelating agents added to nutrient solutions on plants growing in these solutions was investigated. Chelating chemicals used were: 8-hydroxyquinoline (oxine), sodium diethyldithiocarbamate (carbamate), sodium 1:8 dihydroxynaphthalene 3:6 disulphonate (chromatropic salt), sodium 1-nitroso-2-naphthol 3:6 disulphonate (nitroso-R-salt), tetrahydroxyanthraquinone (quinalizarin), and hydroxy-benzoic acid (salicylic acid). Germination and seedling studies with tomato, pea, bean, corn, and radish, and water culture tests with tomatoes, using various concentrations of the chelating agents, are described, and plant responses to these reagents examined. Iron was the only metal ion effectively removed from solution at low concentrations of oxine, carbamate, nitroso-R-salt, and quinalizarin. Iron was not effectively chelated by either chromatropic salt or salicylic acid. Concentrations of chelating agents in which plants would grow did not chelate metal ions effectively, while concentrations of chelating agents which chelated effectively produced severe plant injury. This injury resulted from heavy metals being extracted from the root cells. Since effective chelation in the nutrient solution results in severe plant injury, the use of such agents in nutrient solutions in direct contact with the roots of growing plants is not a feasible method of controlling trace metal contamination in such solutions.

• Research Organization: Univ. of Tennessee, Knoxville
• OSTI ID: 6446394
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 25:4; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

550500 -- Metabolism
560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CHELATING AGENTS
COMPARATIVE EVALUATIONS
ELEMENTS
GERMINATION
GROWTH
INHIBITION
INJURIES
METALS
PLANT GROWTH
PLANTS
ROOTS
TOXICITY