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Two Typical Glycosylated Metabolites of Tetrabromobisphenol A Formed in Plants: Excretion and Deglycosylation in Plant Root Zones
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-05 , DOI: 10.1021/acs.estlett.1c00084 Xingwang Hou 1 , Linfeng Wei 1 , Yinyin Tang 1 , Wenqian Kong 1 , Jiyan Liu 2 , Jerald L Schnoor 3 , Guibin Jiang 2
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-03-05 , DOI: 10.1021/acs.estlett.1c00084 Xingwang Hou 1 , Linfeng Wei 1 , Yinyin Tang 1 , Wenqian Kong 1 , Jiyan Liu 2 , Jerald L Schnoor 3 , Guibin Jiang 2
Affiliation
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The glycosylation process was investigated for the common brominated flame retardant tetrabromobisphenol A (TBBPA) in hydroponic exposure systems with pumpkin seedlings. Two typical glycosylation metabolites of TBBPA formed in pumpkin seedlings, TBBPA mono-β-d-glucopyranoside (TBBPA MG) and TBBPA di-β-d-glucopyranoside (TBBPA DG), increasing their mass early in the exposure (reaching maximum masses of 608 ± 53 and 3806 ± 1570 pmol at 12 h, respectively) and then falling throughout exposure. These two metabolites were released from roots to rhizosphere solutions, where they also exhibited initial increases followed by decreasing trends (reaching maximum masses of 595 ± 272 pmol at 3 h and 77.1 ± 36.0 pmol at 6 h, respectively). However, a (pseudo)zero-order deglycosylation of TBBPA MG and TBBPA DG (during the first 1.5 h) back to TBBPA was unexpectedly detected in the hydroponic solutions containing pumpkin exudates and microorganisms. The function of microorganisms in the solutions was further investigated, revealing that the microorganisms were main contributors to deglycosylation. Plant detoxification through glycosylation and excretion, followed by deglycosylation of metabolites back to the toxic parent compound (TBBPA) in hydroponic solutions, provides new insight into the uptake, transformation, and environmental fate of TBBPA and its glycosylated metabolites in plant/microbial systems.
中文翻译：
植物中形成的四溴双酚 A 的两种典型糖基化代谢物：植物根区的排泄和去糖基化
研究了南瓜苗水培系统中常见溴化阻燃剂四溴双酚 A (TBBPA) 的糖基化过程。南瓜苗中形成的两种典型的 TBBPA 糖基化代谢物，TBBPA mono-β- d-吡喃葡萄糖苷 (TBBPA MG) 和 TBBPA di-β- d-吡喃葡萄糖苷（TBBPA DG），在暴露早期增加它们的质量（分别在 12 小时达到最大质量 608 ± 53 和 3806 ± 1570 pmol），然后在整个暴露过程中下降。这两种代谢物从根部释放到根际溶液中，在那里它们也表现出最初的增加，然后是减少的趋势（分别在 3 小时达到最大质量 595 ± 272 pmol 和在 6 小时达到 77.1 ± 36.0 pmol）。然而，在含有南瓜渗出物和微生物的水培溶液中意外检测到 TBBPA MG 和 TBBPA DG（在前 1.5 小时内）的（伪）零级去糖基化回 TBBPA。进一步研究了溶液中微生物的功能，揭示了微生物是去糖基化的主要贡献者。通过糖基化和排泄的植物解毒，
更新日期：2021-04-13
中文翻译：
植物中形成的四溴双酚 A 的两种典型糖基化代谢物：植物根区的排泄和去糖基化
研究了南瓜苗水培系统中常见溴化阻燃剂四溴双酚 A (TBBPA) 的糖基化过程。南瓜苗中形成的两种典型的 TBBPA 糖基化代谢物，TBBPA mono-β- d-吡喃葡萄糖苷 (TBBPA MG) 和 TBBPA di-β- d-吡喃葡萄糖苷（TBBPA DG），在暴露早期增加它们的质量（分别在 12 小时达到最大质量 608 ± 53 和 3806 ± 1570 pmol），然后在整个暴露过程中下降。这两种代谢物从根部释放到根际溶液中，在那里它们也表现出最初的增加，然后是减少的趋势（分别在 3 小时达到最大质量 595 ± 272 pmol 和在 6 小时达到 77.1 ± 36.0 pmol）。然而，在含有南瓜渗出物和微生物的水培溶液中意外检测到 TBBPA MG 和 TBBPA DG（在前 1.5 小时内）的（伪）零级去糖基化回 TBBPA。进一步研究了溶液中微生物的功能，揭示了微生物是去糖基化的主要贡献者。通过糖基化和排泄的植物解毒，
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