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葉の吸収は植物のマイクロプラスチック蓄積に寄与する
Ye Li1, Junjie Zhang1, Li Xu2
1MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, P. R. China.
Nature
|April 9, 2025
まとめ
大気中のマイクロプラスチックは 植物の葉に吸収され 食物連鎖に入ります この研究は,植物におけるポリエチレンテレフタレート (PET) とポリシュチレン (PS) のMPの広範な吸収を確認し,重要な環境被曝経路を示しています.
科学分野:
- 環境科学
- 植物生物学
- 毒理学について
背景:
- 植物の根は陸上のマイクロプラスチック (MP) を吸収しますが,転移は遅いです.
- 大気中のMPは一般的だが,植物による直接吸収の証拠は限られた.
研究 の 目的:
- 大気中の微小プラスチックが 植物の葉に直接吸収されるかを研究する
- 植物の組織に蓄積するマイクロプラスチックを定量化し,吸収経路を特定する.
主な方法:
- 葉のポリエチレンテレフタレート (PET) とポリスティレン (PS) のポリマーおよびオリゴーマーを検出するための質量スペクトロメトリ
- 超スペクトル画像と原子力顕微鏡-ナノ粒子の可視化のための赤外線スペクトル.
- コーン (Zea mays L.) の粒子の吸収と転移を追跡するために,コンフォカル顕微鏡とレーザー剥離による誘導結合プラズマ質譜測定.
主要な成果:
- 植物葉にPETとPSのポリマーとオリゴーマーが広く存在し,大気中の濃度とともに増加しています.
- 汚染地域における乾燥重量10^4ngまでの濃度で,葉のナノサイズのPETとPSの検出
- マイスの葉が吸い込み,血管組織に転移し,トリコマに蓄積することが示されています.
結論:
- 大気中のマイクロプラスチックが 植物の葉に吸収され蓄積されることは 広範囲にわたる環境現象です
- この経路は,ヒトと生物のマイクロプラスチックへの曝露を評価する上で極めて重要です.
- この結果は環境マイクロプラスチックのリスク評価を再評価することを必要としています.
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