首页|Impact of microplastics on plant biogenic volatile organic compounds emission: A preliminary study
Impact of microplastics on plant biogenic volatile organic compounds emission: A preliminary study
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Plants produce biogenic volatile organic compounds (BVOCs) that are essential for interacting with the environment.As emerging pollutants, microplastics (MPs) may influence BVOCs emissions, yet their effects remainpoorly underexplored. This study employed headspace solid phase microextraction coupled with gas chromatography– mass spectrum to investigate the impact of MPs on the BVOC emission profiles of lettuce (Lactucasativa). Our results demonstrated that polystyrene (PS) MPs exposure, even at environmental concentrations(0.5–2 mg/L), significantly altered BVOC profiles, with a marked increase in aldehydes and ketones. A 7-foldincrease in phenylacetaldehyde and benzaldehyde at 50 mg/L indicated stress-related metabolic changes,which also evidenced by reduced superoxide dismutase (SOD) activity and shifts in root microbial communities.The key discriminating BVOCs identified suggest that the presence of MPs impact plant survival and adaptability,with emissions originating from various metabolic pathways, including phenylpropanoid, lipoxygenase, andterpenoid synthesis pathways. Furthermore, variations in type, size, and aging treatment of MPs influencedBVOCs emission patterns. Our findings underscore the significance of BVOCs as indicators of exposure risksassociated with MPs and highlight the ecological threats posed by these pollutants.
Biogenic volatile organic (BVOCs)HS-SPMEMicroplastic leachateLettuce (Lactuca sativa)Metabolic pathwaysAntioxidant SystemMicrobial community
College of Environment and Climate, Guangdong Provincial Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 511443, China
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
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