Publication Details
Category Text Publication
Reference Category Journals
Title (Primary) 15N-Tracerstudien zur Untersuchung des Einflusses von atmosphärischen Herbizid-Konzentrationen auf den pflanzlichen N-Metabolismus
Author Schweizer, A.; Hafner, C.; Jung, K.; Hurle, K.; Schüürmann, G.
Source Titel Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz - Journal of Plant Diseases and Protection
Year 2000
Department OEC; COE
Volume Sonderheft 17
Page From 799
Page To 806
Language deutsch
Abstract

In wind tunnel experiments the effect of airborne Bromoxynil on the nitrogen metabolism of young tomato and sunflower plants was studied using the N-15-tracer technique. Bromoxynil concentrations from 0-3,420 ng/m(3) were tested in 48 h exposure experiments. No observable effect concentrations (NOEC) were derived from the obtained dose-response relationships.

Very low bromoxynil concentrations (2 ng/m(3)) lead to a stimulation of the N-15-incorporation. Only concentrations >1,000 ng/m(3) caused a decrease in the N-15-incorporation of the non-protein and protein fraction. The derived NOECs for tomato were 2.6 ng/m(3) for the non-protein and 1.1 ng/m(3) for the protein fraction, respectively. For sunflower, the respective NOECs were 1.6 ng/m(3) and 1.7 ng/m(3).

Measurements with tomato plants seven days after Bromoxynil exposure resulted in four times higher NOEC values compared to right after the 48 h exposure. This demonstrates the ability of the plants to recover from low concentrations. At 2 ng/m(3) tomatoes recovered completely after the 7 days, while higher concentrations lead to a lasting effect.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=7646
Schweizer, A., Hafner, C., Jung, K., Hurle, K., Schüürmann, G. (2000):
15N-Tracerstudien zur Untersuchung des Einflusses von atmosphärischen Herbizid-Konzentrationen auf den pflanzlichen N-Metabolismus
Z. Pflanzenk. Pflanzens. - J. Plant Dis. Prot. Sonderheft 17 , 799 - 806