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Title: Acid rain research program. Annual progress report, July 1976--September 1977. [Effects on plants and soil microbiological processes]

Abstract

Experiments were carried out and chemical aspects of ambient precipitation were determined using a sequential precipitation collector for the period July 1976 through September 1977. A related report provides experimental details. In experiments with plants, experiments were aimed to document: the foliar response of six clones of hybrid poplar to simulated acid rain; effects of buffered solutions and various anions on vegetative and sexual development of gametophytes of the fern (Pteridium aquilinum) and the acid-sensitive steps of symbiotic nitrogen fixation of the garden pea (Pisum sativum). After five 6 min daily exposures to simulated rain of pH 2.7, up to 10 percent of the leaf area of some poplar clones was injured. Lesions developed mostly near stomata and vascular tissue as shown with other plant species. Acidic solutions have a marked effect on sperm motility and fertilization (sexual reproduction) of bracken fern. Since sexual reproduction of ferns is very sensitive to mildly acidic conditions under laboratory conditions, experiments are planned to view the response of sexual stages of other plant species. Nodulation and symbiotic nitrogen fixation in Pisum is very sensitive to nutrient solution acidity. Specific isolates of Rhizobium bacteria are used and the medium pH can be maintained rigidly.more » In experiments to determine the effects of excess acidity on soil microbiological processes, the rate of denitrification may be slowed so drastically that increases of N/sub 2/O in the atmosphere may result with a subsequent reduction in soil nitrogen levels.« less

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (USA)
OSTI Identifier:
6696538
Report Number(s):
BNL-50786
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ACID RAIN; BIOLOGICAL EFFECTS; ENVIRONMENTAL TRANSPORT; BACTERIA; BIOCHEMICAL REACTION KINETICS; SOILS; FERNS; REPRODUCTION; LEAVES; PATHOLOGICAL CHANGES; PISUM; NITROGEN FIXATION; TREES; AIR POLLUTION; ATMOSPHERIC PRECIPITATIONS; BNL; CHEMICAL COMPOSITION; GAMETES; LEGUMINOSAE; NITROGEN DIOXIDE; PEAS; PH VALUE; PLANTS; SURFACE AIR; AIR; BIOMASS; CHALCOGENIDES; DISEASES; ENERGY SOURCES; FLUIDS; FOOD; GASES; GERM CELLS; KINETICS; MASS TRANSFER; MICROORGANISMS; NATIONAL ORGANIZATIONS; NITROGEN COMPOUNDS; NITROGEN OXIDES; OXIDES; OXYGEN COMPOUNDS; POLLUTION; RAIN; REACTION KINETICS; RENEWABLE ENERGY SOURCES; US AEC; US ERDA; US ORGANIZATIONS; VEGETABLES; 500200* - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989); 560303 - Chemicals Metabolism & Toxicology- Plants- (-1987); 560302 - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)

Citation Formats

Evans, L. S., Francis, A. J., and Raynor, G. S. Acid rain research program. Annual progress report, July 1976--September 1977. [Effects on plants and soil microbiological processes]. United States: N. p., 1977. Web. doi:10.2172/6696538.
Evans, L. S., Francis, A. J., & Raynor, G. S. Acid rain research program. Annual progress report, July 1976--September 1977. [Effects on plants and soil microbiological processes]. United States. https://doi.org/10.2172/6696538
Evans, L. S., Francis, A. J., and Raynor, G. S. Thu . "Acid rain research program. Annual progress report, July 1976--September 1977. [Effects on plants and soil microbiological processes]". United States. https://doi.org/10.2172/6696538. https://www.osti.gov/servlets/purl/6696538.
@article{osti_6696538,
title = {Acid rain research program. Annual progress report, July 1976--September 1977. [Effects on plants and soil microbiological processes]},
author = {Evans, L. S. and Francis, A. J. and Raynor, G. S.},
abstractNote = {Experiments were carried out and chemical aspects of ambient precipitation were determined using a sequential precipitation collector for the period July 1976 through September 1977. A related report provides experimental details. In experiments with plants, experiments were aimed to document: the foliar response of six clones of hybrid poplar to simulated acid rain; effects of buffered solutions and various anions on vegetative and sexual development of gametophytes of the fern (Pteridium aquilinum) and the acid-sensitive steps of symbiotic nitrogen fixation of the garden pea (Pisum sativum). After five 6 min daily exposures to simulated rain of pH 2.7, up to 10 percent of the leaf area of some poplar clones was injured. Lesions developed mostly near stomata and vascular tissue as shown with other plant species. Acidic solutions have a marked effect on sperm motility and fertilization (sexual reproduction) of bracken fern. Since sexual reproduction of ferns is very sensitive to mildly acidic conditions under laboratory conditions, experiments are planned to view the response of sexual stages of other plant species. Nodulation and symbiotic nitrogen fixation in Pisum is very sensitive to nutrient solution acidity. Specific isolates of Rhizobium bacteria are used and the medium pH can be maintained rigidly. In experiments to determine the effects of excess acidity on soil microbiological processes, the rate of denitrification may be slowed so drastically that increases of N/sub 2/O in the atmosphere may result with a subsequent reduction in soil nitrogen levels.},
doi = {10.2172/6696538},
url = {https://www.osti.gov/biblio/6696538}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {12}
}