Nitrogen fixation in soybean treated with nitrogen dioxide and molybdenum

Journal Article · · Journal of Environmental Quality; (United States)

DOI:https://doi.org/10.2134/jeq1992.00472425002100010006x· OSTI ID:5307033

Gupta, G; Narayanan, R ^[1]

---

1. Univ. of Maryland, Princess Anne (United States)

Soybean plants were treated with Mo (0.0 or 2.0 mg kg{sup {minus}1}, soil dry wt.) and exposed to NO{sub 2} (0.0, 0.05, or 0.1 {mu}mol mol{sup {minus}1}) at flowering stage. Specific root nodule activity (SNA), chlorophyll-a (Ch-a), chlorophyll-b (Ch-b), leaf N, number of pods, seeds per pod, weight of seeds, and shoot dry weight were measured. Compared with control, SNA did not change on the addition of 2 mg Mo to the soil, but increased by 65% on exposure to 0.1 {mu}mol{sup {minus}1} NO{sub 2} and by 106% on treatment with both NO{sub 2} and Mo. Both Ch-a and Ch-b increased significantly on exposure to 0.1 {mu}mol {sup {minus}1} NO{sub 2} and 2 mg MO was almost the same as with 0.1 {mu}mol mol{sup {minus}1} NO{sub 2} alone. Leaf-N increased by 46% on exposure to NO{sub 2} but did not change on the addition of Mo. Pod number, seed number and weight, and shoot dry weights showed significantly higher values on exposure to 0.1 {mu}mol mol{sup {minus}1} NO{sub 2} and 2 mg Mo.

• OSTI ID: 5307033
• Journal Information: Journal of Environmental Quality; (United States), Vol. 21:1; ISSN 0047-2425
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
54 ENVIRONMENTAL SCIENCES
59 BASIC BIOLOGICAL SCIENCES
GLYCINE HISPIDA
NITROGEN FIXATION
MOLYBDENUM
BIOLOGICAL EFFECTS
NITROGEN DIOXIDE
CHLOROPHYLL
LEAVES
PLANT GROWTH
SEEDS
SOILS
CARBOXYLIC ACIDS
CHALCOGENIDES
ELEMENTS
GROWTH
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LEGUMINOSAE
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
PLANTS
PORPHYRINS
PROTEINS
TRANSITION ELEMENTS
560300* - Chemicals Metabolism & Toxicology
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
550300 - Cytology