title: Influence of Uptake Pathways on the Stereoselective Dissipation of Chiral Neonicotinoid Sulfoxaflor in Greenhouse Vegetables.
abstract: Stereoselectivity is of vital importance in our environment and needs to be taken into account for comprehensive risk assessment and regulatory decisions of chiral neonicotinoid sulfoxaflor. However, little is known about the dissipation of sulfoxaflor stereoisomers with respect to stereoselectivity in plants under greenhouse cultivation. To bridge the knowledge gap, the current study was initiated to investigate the stereoselective degradation of sulfoxaflor in solar greenhouse cucumber and tomato from foliage and root uptake pathways. The stereoselective dissipation of sulfoxaflor was not statistically different between enantiomer pairs from foliage and root pathways of vegetables (P < 0.05). The persistence of sulfoxaflor stereoisomers was consistently prolonged under the foliage uptake pathway (t1/2, 3.38-14.09 days) compared to the root uptake pathway (t1/2, 2.65-5.07 days) in both vegetable fruits. Nevertheless, the concentrations of (+)-sulfoxaflor A and (-)-sulfoxaflor B were both slightly higher than that of their antipode. The tiny difference should be emphasized because it might be magnified to a significant difference by the high-potential bioaccumulation of sulfoxaflor in the food chain.
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Zenglong
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Fengshou
authors.initials: F
authors.lastname: Dong
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Xinglu
authors.initials: X
authors.lastname: Pan
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Xingang
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Xiaohu
authors.initials: X
authors.lastname: Wu
authors.affiliation: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences , Beijing 100193, People's Republic of China.
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D002851:Chromatography, High Pressure Liquid; D018553:Cucumis sativus / Q000737:chemistry; D007306:Insecticides / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D018551:Solanum lycopersicum / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D011725:Pyridines / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D013237:Stereoisomerism; D013457:Sulfur Compounds / Q000032:analysis / Q000737:chemistry / Q000494:pharmacology; D014675:Vegetables / Q000737:chemistry*
chemical_list: D007306:Insecticides; D011725:Pyridines; D013457:Sulfur Compounds; C560328:sulfoxaflor
keywords: solar greenhouse; stereoselectivity; sulfoxaflor; ultrahigh performance supercritical fluid chromatography−tandem mass spectrometry; uptake pathways