Growth and water movement in silver maple seedlings affected by cadmium
Effect of cadmium chloride on dry weights accumulation, height growth, nd relative conductivity of stems of silver maple (Acer saccharinum L.) seedlings exposed to 0, 5, 10, or 20 ppM CdCl/sub 2/. 2/sup 1///sub 2/ H/sub 2/O (on weight basis of rooting media) was determined. Leaf, stem, and root dry weight were significantly reduced by all CdCl/sub 2/ treatments. Seedling height at 8 weeks was severely reduced and strongly corrlated with applied CdCl/sub 2/ levels. Relative conductivity of excised stem sections was significantly reduced by Cd treatment. The reduction was caused by (i) a progressive decrease in the proportion of xylem tissue available for water conduction, (ii) reduced size of vessels and tracheids, and (iii) partial blockage of xylem elements by cellular debris or gums. These findings are discussed in relation to water stress.
- Research Organization:
- Purdue Univ., Lafayette, IN
- OSTI ID:
- 5037702
- Journal Information:
- J. Environ. Qual.; (United States), Vol. 6:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CADMIUM CHLORIDES
BIOLOGICAL EFFECTS
LEAVES
PLANT GROWTH
PLANT STEMS
ROOFS
SEEDLINGS
TREES
WATER
WEIGHT
BIOMASS
CADMIUM COMPOUNDS
CADMIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
ENERGY SOURCES
GROWTH
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PLANTS
RENEWABLE ENERGY SOURCES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)