Soil microbial-legume interacts in heavy metal contaminated at Palmerton, PA
The interaction between soil pH, vesicular-arbuscular mycorrhiza (VAM) and heavy metal uptake into soybeans (Glycine max) and alfalfa (Medicago sativa) was studied in the heavy metal stressed soils of Palmerton, PA. The dry weight of soybeans grown in soil with an available Zn concentration of 132 ug/g soil was 2.0 g/plant as compared to 0.13 g/plant for soybeans grown in soil containing 862 ug Zn/g soil. In the same soils, the foliar uptake of Zn was increased from 186 to 1020 ug Zn/g tissue. When VAM were inoculated into the soil with a high Zn content, the foliar Zn content was reduced from 968 to 780 ug/g tissue. Similar observations were noted for Cd and Mn. When, however, the soil metal concentration was low, VAM significantly increased heavy metal uptake. Vesicular-arbuscular mycorrhiza increased Zn uptake from 201 to 251 ug/g. Similar results were observed when the pH of a single soil was altered. Metal uptake, as affected by VAM, was generally decreased from soils with a low pH (6.0). At a soil pH of 6.7 and 7.2, VAM increased foliar heavy metal uptake. Both VAM colonization and plant growth were also increased by increasing soil pH. At a pH of 6.0, VAM colonization and plant growth were 15.5% and 0.37 g/10 alfalfa plants, respectively. At a pH of 7.2, VAM colonization was rated at 32.0% while plant growth of 0.76 g/10 plants was noted.
- Research Organization:
- Univ. of Maryland, College Park (USA)
- OSTI ID:
- 6000067
- Report Number(s):
- CONF-8805159-
- Journal Information:
- Trace Subst. Environ. Health; (United States), Vol. 12; Conference: 22. annual conference on trace substances in environmental health, St. Louis, MO, USA, 23-26 May 1988
- 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.
ALFALFA
PLANT GROWTH
CADMIUM
TOXICITY
GLYCINE HISPIDA
MANGANESE
SOILS
CONTAMINATION
ZINC
ECOLOGICAL CONCENTRATION
FOLIAR UPTAKE
MYCORRHIZAS
NITROGEN FIXATION
PENNSYLVANIA
PH VALUE
SYMBIOSIS
ELEMENTS
FEDERAL REGION III
GROWTH
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METALS
NORTH AMERICA
PLANTS
TRANSITION ELEMENTS
UPTAKE
USA
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)
560300 - Chemicals Metabolism & Toxicology