Growth changes of eighteen herbaceous angiosperms induced by Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in soil

Study objectives were to describe and quantify growth responses (tolerance as shoot and root biomass accumulation) to soil-applied Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) treatments of eighteen terrestrial, herbaceous, angiospermous species and also; to determine how much of RDX, RDX transform...

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Bibliographic Details
Published in:	International journal of phytoremediation Vol. 18; no. 1; pp. 94 - 102
Main Authors:	Hagan, Frank L, Koeser, Andrew K, Dawson, Jeffrey O
Format:	Journal Article
Language:	English
Published:	United States Taylor & Francis 02-01-2016 Taylor & Francis Ltd
Subjects:	Biodegradation, Environmental Biomass biomass production Bioremediation biosensors Constants Coronilla varia Cultivars Flowers & plants Foliage greenhouse experimentation growth retardation leaves Magnoliopsida - drug effects Magnoliopsida - growth & development nitrogen Nonnative species phytoextraction phytoremediation Plant growth Plant Roots - drug effects Plant Roots - growth & development Plant Shoots - drug effects Plant Shoots - growth & development Plants (organisms) RDX roots royal demolition explosive Securigera varia shoots Sida spinosa soil Soil (material) Soil contaminants soil pollutants Soil Pollutants - metabolism stable isotopes Tolerances Transformations Triazines - metabolism Uptakes phytoextraction royal demolition explosive phytoremediation soil pollutants RDX
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Summary:	Study objectives were to describe and quantify growth responses (tolerance as shoot and root biomass accumulation) to soil-applied Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) treatments of eighteen terrestrial, herbaceous, angiospermous species and also; to determine how much of RDX, RDX transformation products, total N and RDX-derived N accumulated in the foliage. RDX altered growth of eighteen plant species or cultivars at levels of 100, 500, and 1,000 mg kg ⁻¹dry soil in a 75-d greenhouse study. Sixteen species or cultivars exhibited growth inhibition while two were stimulated in growth by RDX. A maximum amount of foliar RDX in a subset of three plant species was 36.0 mg per plant in Coronilla varia. Foliar concentrations of transformation products of RDX were low relative to RDX in the subset of three species. The proportion of RDX-N with respect to total N was constant, suggesting that foliar RDX transformation did not explain differences in tolerance. There was a δ ¹⁵N shift towards that of synthetic RDX in foliage of the three species at a level of 1,000 mg kg ⁻¹ RDX, proportional in magnitude to uptake of N from RDX and tolerance ranking.Reddened leaf margins for treated Sida spinosa indicate the potential of this species as a biosensor for RDX.
Bibliography:	http://dx.doi.org/10.1080/15226514.2015.1073665 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1549-7879 1522-6514 1549-7879
DOI:	10.1080/15226514.2015.1073665