Copper toxicity in Phaseolus vulgaris L. as influenced by iron nutrition. II. Elemental and electron microprobe analysis
In plants grown without Fe or with Fe tartrate, 0.50 ppm Cu reduced Fe concentration only in the roots. When FeEDTA was used, Fe concentrations were higher in the roots at 0.04 and 0.50 ppm Cu than other treatments. Concentrations of Cu in the roots increased with the increase in Cu in the nutrient solution; in the shoots there was little difference. With FeEDTA, the Cu concentration in the roots and shoots at both levels of Cu was considerably less than with Fe tartrate or without Fe. Microprobe analysis showed accumulations of Fe in wall areas of some xylem elements in the midrib of leaves of plants grown with Fe tartrate-0.50 ppm Cu only. Iron did not accumulate in comparable tissues with Fe tartrate-0.04 ppm Cu and with FeEDTA-0.40 and 0.50 ppm Cu. Copper was distributed uniformly throughout the tissues but P accumulated only in wall areas of the cells. The localization of Fe and P in the same cell suggested that high Cu induced chlorosis by precipitation of Fe and Fe phosphate. 18 references, 4 figures, 2 tables.
- Research Organization:
- Univ. of Wisconsin, Madison
- OSTI ID:
- 6426866
- Journal Information:
- J. Am. Soc. Hortic. Sci.; (United States), Journal Name: J. Am. Soc. Hortic. Sci.; (United States) Vol. 98:1; ISSN JOSHB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AMINO ACIDS
BACTERIA
BIOLOGICAL EFFECTS
BIOLOGICAL LOCALIZATION
CARBOXYLIC ACIDS
CELL CONSTITUENTS
CELL WALL
CHELATING AGENTS
COMPARATIVE EVALUATIONS
COPPER
CORRELATIONS
DOSE-RESPONSE RELATIONSHIPS
EDTA
ELEMENTS
IRON
LEGUMINOSAE
METALS
MICROORGANISMS
NONMETALS
NUTRIENTS
NUTRITION
NUTRITIONAL DEFICIENCY
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHASEOLUS
PHOSPHORUS
PLANTS
RESPONSE MODIFYING FACTORS
RHIZOBIUM
ROOTS
TOXICITY
TRANSITION ELEMENTS