|Author||Bystrom, B. G. ♦ Glater, R. B. ♦ Scott, F. M. ♦ Bowler, E. S.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT. ♦ ENVIRONMENTAL SCIENCES ♦ LEAVES ♦ ULTRASTRUCTURAL CHANGES ♦ PHOTOCHEMICAL OXIDANTS ♦ TOXICITY ♦ AGE DEPENDENCE ♦ AIR POLLUTION ♦ BEETS ♦ ELECTRON MICROSCOPY ♦ EPIDERMIS ♦ INSECTS ♦ MORPHOLOGY ♦ WAXES ♦ ANIMAL TISSUES ♦ ANIMALS ♦ ARTHROPODS ♦ BODY ♦ EPITHELIUM ♦ FOOD ♦ INVERTEBRATES ♦ MICROSCOPY ♦ MORPHOLOGICAL CHANGES ♦ ORGANIC COMPOUNDS ♦ ORGANS ♦ OTHER ORGANIC COMPOUNDS ♦ PLANTS ♦ POLLUTION ♦ SKIN ♦ TISSUES ♦ VEGETABLES ♦ Chemicals Metabolism & Toxicology- Plants- (-1987) ♦ Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)|
|Abstract||The waxy surface of the epidermis of table-beet leaves has been examined with the light and electron microscopes. On very young leaf surfaces, wax occurs in the form of stubby rodlets. As cells enlarge during leaf growth, extrusion of the rodlets continues and they coalesce to form plaques. In young-mature, non-stomatal cells, a central wax plaque is surrounded by peripheral rodlets. By full maturity the entire cell surface is covered. As the extrusion rate slows in aging leaves, the waxy surface becomes flatter and smoother. The surface wax dissolves in chloroform or other wax solvents. After exposure of plants to polluted air containing solar-irradiated auto exhaust (smog), morphological changes occur in the leaf surface wax. These changes may be related to differences in the rate of wax rodlet extrusion. The wounding caused by feeding aphids results in a different surface pattern. 23 references, 16 figures.|
|Learning Resource Type||Article|
|Publisher Place||United States|
|Organization||Univ. of California, Los Angeles|
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