« Previous AbstractAllelochemicals of Polygonella myriophylla: chemistry and soil degradation    Next Abstract[Effect of various insecticides and attracting substances on files in animal stables] »

J Chem Ecol

Title:		Biomimetic measurement of allelochemical dynamics in the rhizosphere
Author(s):		Weidenhamer JD;
Address:		"Department of Chemistry, Ashland University, Ashland, Ohio 44805, USA. jweiden@ashland.edu"
Journal Title:		J Chem Ecol
Year:		2005
Volume:		31
Issue:		2
Page Number:		221 - 236
DOI:		10.1007/s10886-005-1337-x
ISSN/ISBN:		0098-0331 (Print) 0098-0331 (Linking)
Abstract:		"Polydimethylsiloxane (PDMS) materials were used to quantify levels of the photosynthesis inhibitor sorgoleone in the undisturbed rhizosphere of sorghum plants. The materials used included stir bars coated with PDMS (stir bar sorptive extraction), technical grade optical fiber coated with a thin film of PDMS (matrix-solid phase microextraction), and PDMS tubing. PDMS tubing retained the most sorgoleone. As analyzed by high performance liquid chromatography, amounts of sorgoleone retained on the PDMS materials increased with time. Other materials tested (polyurethane foam plugs, C18 and Tenax disks, and resin capsules) proved less suitable, as they were subject to sometimes extensive penetration by fine root hairs. These results demonstrate the potential for PDMS-based materials to monitor the release of allelochemicals in the undisturbed rhizosphere of allelopathic plants. Unlike extraction procedures that recover all available compounds present in the soil, PDMS functions in a manner more analogous to plant roots in sorbing compounds from soil solution or root exudates. Information on chemical dynamics in the rhizosphere is crucial for evaluating specific hypotheses of allelopathic effects, understanding allelopathic mechanisms, and assessing the importance of allelopathic processes in plant communities"
Keywords:		"Benzoquinones/*analysis Biomimetic Materials/*chemistry Chromatography, High Pressure Liquid Dimethylpolysiloxanes/chemistry Enzyme Inhibitors/pharmacology Lipids/*analysis Pheromones/*analysis/chemistry/pharmacology Photosynthesis Plant Extracts/chemistr;"
Notes:		"MedlineWeidenhamer, Jeffrey D eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2005/04/29 J Chem Ecol. 2005 Feb; 31(2):221-36. doi: 10.1007/s10886-005-1337-x"