Forchlorfenuron is a widely used plant growth regulator. It was noticed that forchlorfenuron affected fruit quality and its metabolite poses a potential risk for human health. However, its spatial distribution and metabolism in agricultural food has been fully unrevealed. Therefore, we performed matrix-assisted laser desorption/ionization (MALDI-IMS) and high-performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS), analysis to investigate their spatial distribution and metabolism in oriental melons under greenhouse cultivation. Forchlorfenuron parent was degraded rapidly in melon at the recommended application concentration (20mg/L) and gradually migrated from exocarp to endocarp. In 0-2 d, the concentrations of forchlorfenuron parent were higher(254.24-1122.03 μg/kg), which were mainly activity in exocarp and mesocarp of melon; In the 3-4 d, the forchlorfenuron were decreased rapidly and evenly distributed in entire oriental melon body. The metabolite 4-hydroxyphenyl-forchlorfenuron was first identified in oriental melon, which exhibited the highest level of residues of 5.12 μg/kg on the 4 days after application. The dissipation rate of 4-hydroxyphenyl-forchlorfenuron was greater than the metabolic rate of forchlorfenuron and mainly activity in mesocarp of melon. The results obtained in this study offer important insights into the potential migration and effects of forchlorfenuron in oriental melons .

Spatial distribution and metabolism of forchlorfenuron in oriental melon under greenhouse cultivation

ACS Spring Meeting 2021

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