Potential for the evolution of heavy metal tolerance in Bryum argenteum, a moss. II. Generalized tolerances among diverse populations
- Ithaca College, NY (USA)
Tolerance of copper, zinc, lead, and nickel were measured in two individuals from each of seven populations of Bryum argenteum. The populations represented a range of habitats including industrial sites subject to atmospheric metal deposition, metal-contaminated mine tailings, serpentine barrens, and urban areas. Nevertheless, there was no evidence of adaptive differentiation in tolerance to any of the metals. Populations did differ significantly in general growth vigor across all experimental treatments. These observations contrast with results from studies of angiosperms, in which the evolution of heavy-metal tolerance almost always involves ecotypic differentiation among populations, but fit an emerging picture of B. argenteum as a plastic, broadly tolerant species with surprisingly little genetic differentiation among populations.
- OSTI ID:
- 6518905
- Journal Information:
- Bryologist; (USA), Vol. 93:2; ISSN 0007-2745
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
METALS
TOXICITY
MOSSES
PHYSIOLOGY
BIOLOGICAL ADAPTATION
COPPER
HABITAT
LEAD
MINES
NICKEL
PLANT GROWTH
TAILINGS
TOLERANCE
ZINC
BRYOPHYTA
ELEMENTS
GROWTH
PLANTS
SOLID WASTES
TRANSITION ELEMENTS
UNDERGROUND FACILITIES
WASTES
560300* - Chemicals Metabolism & Toxicology