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Decreased transpiration in poplar trees exposed to 2,4-6-trinitrotoluene
- Thompson, P.L., Ramer, L.A., Guffey, A.P., Schnoor, J.L.
- Environmental toxicology and chemistry 1998 v.17 no.5 pp. 902-906
- abscission, chlorosis, hybrids, hydroponics, leaves, transpiration, trees, trinitrotoluene
- This article discusses the effects of various concentrations of the explosive 2,4,6-trinitrotoluene (TNT) on the transpiration of hybrid poplar trees growing in hydroponic media. Transpiration was measured daily by gravimetric means. The rapid removal of TNT from hydroponic solutions was a result of plant uptake and required a daily dosage of TNT to ensure a relatively constant exposure over time. Transpiration decreased with increasing TNT concentrations greater than or equal to 5 mg/L. Decreases in transpiration were accompanied by leaf chlorosis and abscission. A comparison between a laboratory study and a pilot-scale experiment showed good scale-up potential.