Influence of binary interactions of arsenate, molybdate, and selenate on yield and composition of alfalfa. [Medicago sativa L]

Journal Article · · Journal of Environmental Quality; (USA)

OSTI ID:6956608

Khattak, R A ^[1]; Haghnia, G H ^[2]; Mikkelsen, R L ^[3]; Page, A L; Bradford, G R ^[4]

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1. N.W.F.P. Agric. Univ., Peshawar (Pakistan)
2. Ferdowsi Univ., Mashhad (Iran)
3. Tennessee Valley Authority, Muscle Shoals, AL (USA)
4. Univ. of California, Riverside (USA)

To evaluate the effects of binary interactions (As(V) {times} Se(VI), Se(VI) {times} Mo(VI) and As(V) {times} Mo(VI)) on growth and composition of alfalfa (Medicago sativa L.), three glasshouse sand culture experiments were conducted. Added Mo(VI) concentrations in the nutrient solutions had no significant effect on the tissue yield of alfalfa. Arsenic showed some adverse effect on shoot and root yield. The highest Se(VI) treatment decreased alfalfa shoot and root yield. The tissue As, Se, and Mo concentrations increased correspondingly with the increased solution concentrations. At equal levels in the solution, alfalfa accumulated Se > Mo >> As. Increasing As(V) in solution caused significant increases in shoot Se concentrations and uptake, whereas solution Se(VI) showed a strong antagonistic effect on As uptake. The Se treatments significantly increase Mo concentrations and uptake by shoot and root at all levels of solution Mo, except 0.01 mg L{sup {minus}1} where 1.0 mg Se L{sup {minus}1} increased Mo concentration, but had no significant effect on Mo uptake. Increasing Mo levels in the nutrient solution showed no significant effect on Se concentration and uptake by root. However, at 1.0 mg Se(VI) L{sup {minus}1}, shoot Se concentration increased significant increased significantly at 3.0 and 5.0 mg Mo L{sup {minus}1}. The solution As(V) showed no significant effect on tissue Mo at 0.01 and 1.0 mg Mo(VI) L{sup {minus}1} but increased Mo concentrations in shoot significantly at 3.0 and 5.0 mg Mo(VI) L{sup {minus}1}.

• OSTI ID: 6956608
• Journal Information: Journal of Environmental Quality; (USA), Journal Name: Journal of Environmental Quality; (USA) Vol. 18:3; ISSN JEVQA; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALFALFA
ANIONS
ARSENIC COMPOUNDS
CHARGED PARTICLES
CHEMICAL REACTION KINETICS
GROWTH
IONS
KINETICS
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MOLYBDENUM COMPOUNDS
PLANT GROWTH
PLANTS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SELENIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
UPTAKE