Effects of nitrogen dioxide on biochemical and physiological characteristics of soybean (Glycine max (L. ) Merrill)
One month old soybean cv. Williams plants were exposed to nitrogen dioxide (NO/sub 2/ at 0.1, 0.2, 0.3, and 0.5 ppm) and carbon-filtered air (control), 7 hour per day, for 5 days, under controlled environment. Data were collected on net photosynthetic rate (PN), stomatal resistance (SR), and dark respiratory rate (DR), immediately following fifth day of exposure and 24 hours after termination of exposure using LICOR 6000 Portable Photosynthesis System. Chlorophyll a (Ch a), chlorophyll b (Ch b), and total chlorophyll (tot Ch) were measured before and after exposures, using a spectrophotometer. Leaf nitrogen was determined using kjeldahl digestion followed by colorimetric determination of total N. Growth characteristics-relative growth rate (RGR), net assimilation rate (NAR), leaf area ratio (LAR), and root shoot ratio (RSR)-were computed for treated plants using standard growth equations. Solute leakage (electrical conductivity) was measured 2 and 24 hours after incubation of treated leaf tissue in deionized water.
- Research Organization:
- Maryland Univ., Princess Anne (USA). Coastal Ecology Research Lab.
- OSTI ID:
- 6596611
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GLYCINE HISPIDA
SENSITIVITY
NITROGEN DIOXIDE
TOXICITY
AIR POLLUTION
CHLOROPHYLL
ELECTROPHYSIOLOGY
LEAVES
PHOTOSYNTHESIS
PLANT GROWTH
ROOTS
BACTERIA
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LEGUMINOSAE
MICROORGANISMS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHYSIOLOGY
PHYTOCHROMES
PIGMENTS
PLANTS
POLLUTION
PORPHYRINS
PROTEINS
RHIZOBIUM
SYNTHESIS
560300* - Chemicals Metabolism & Toxicology