Growth and element accumulation by two single-cross corn hybrids as affected by copper in solution
The objectives of this investigation were to: measure Cu ion potentials, pCu, associated with minimum and maximum Cu ion activities for growth of corn (Zea mays L.) seedlings; evaluate the influence of the chelator DTPA (diethylenetriaminepentaacetic acid) on plant uptake of Cu; and relate pCu to uptake of Cu and other elements by single-cross corn hybrids selected for genetic controlled accumulations of relatively high and low concentrations of leaf Cu. Two corn hybrids were grown in the greenhouse using solution cultures of varying pCu. For both hybrids, root and top growth were reduced due to Cu toxicity when pCu was less than or equal to 5.78. A deficiency of Cu was associated with a pCu > 13. While Cu concentrations in plant tops increased with decreasing pCu for both hybrids, the hybrids were different as predicted from the performance of the parental inbred lines. At high levels of Cu (pCu of 5 to 7) hybrid differences and changes in plant concentrations of Cu with pCu in solutions indicated that plant composition could not be used to indicate toxic substrate levels of Cu. 20 references, 2 figures, 3 tables.
- Research Organization:
- Pennsylvania Agricultural Experiment Station, University Park
- OSTI ID:
- 6375104
- Journal Information:
- Agron. J.; (United States), Vol. 68:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPPER
BIOLOGICAL EFFECTS
DOSE-RESPONSE RELATIONSHIPS
COMPARATIVE EVALUATIONS
CORRELATIONS
DTPA
GREENHOUSES
MAIZE
PLANT GROWTH
ROOTS
TOXICITY
AMINO ACIDS
BUILDINGS
CARBOXYLIC ACIDS
CEREALS
CHELATING AGENTS
DRUGS
ELEMENTS
GRASS
GROWTH
METALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PLANTS
RADIOPROTECTIVE SUBSTANCES
TRANSITION ELEMENTS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)