« Previous AbstractVolatilome changes during probiotic fermentation of combined soy and rice drinks    Next AbstractA water resistant solid-phase microextraction fiber with high selectivity prepared by a metal organic framework with perfluorinated pores »

J Environ Sci Health B

Title:		Propylene glycol vapor contamination in controlled environment growth chambers: toxicity to corn and soybean plants
Author(s):		Niu G; McConnell L; Reddy VR;
Address:		"Alternate Crops and Systems Laboratory, ARS-USDA, Beltsville, Maryland, USA. gniu@ag.tamu.edu"
Journal Title:		J Environ Sci Health B
Year:		2005
Volume:		40
Issue:		3
Page Number:		443 - 448
DOI:		10.1081/pfc-200047578
ISSN/ISBN:		0360-1234 (Print) 0360-1234 (Linking)
Abstract:		"A major, often unrecognized variable regulating plant growth in semi-closed environment is air contaminant. The vapor of propylene glycol (PG), which was used as coolant in growth chambers, has been found to be toxic to corn (Zea mays L.) and soybean (Glycine max L.) plants. PG solution leaked from a valve packing system and volatilized to vapor, which was trapped in a semi-closed growth chamber. Symptoms of leaf edge chlorosis, later developing into necrosis, were observed on the third day of emergence or on the third day after moving healthy plants into the chamber. For young soybean plants, symptoms were slightly different from those observed in corn plants; the chlorosis symptoms were not uniformly distributed on all leaves. Some soybean leaves curled up and others had white spots. This problem was identified by using a portable photoionization detector to obtain instantaneous readings of total volatile organic compound concentrations inside the chambers. The presence of PG in selected chambers was verified using sample collection with solid phase microextraction (SPME) followed by analysis with multi-dimensional gas chromatography mass spectrometry (MD-GC-MS). This information is pertinent to researchers who use controlled environment to grow plants"
Keywords:		"Air Pollutants/*toxicity *Ecological Systems, Closed Gas Chromatography-Mass Spectrometry Plant Growth Regulators/metabolism Propylene Glycol/*toxicity Solvents/*toxicity Soybeans/*drug effects/growth & development Volatilization Zea mays/*drug effects/gr;"
Notes:		"MedlineNiu, Genhua McConnell, Laura Reddy, Vangimalla R eng England 2005/05/26 J Environ Sci Health B. 2005; 40(3):443-8. doi: 10.1081/pfc-200047578"