Asteraceae degrade atrazine in the presence of iron under circumneutral conditions via a rhizosphere Fenton reaction
Asteraceae degrade atrazine in the presence of iron under circumneutral conditions via a rhizosphere Fenton reaction
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DOI：
10.1007/s11104-021-05102-9
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发表时间：
2021-10
期刊：
影响因子：
4.9
通讯作者：
T. Wagatsuma;T. Otani;N. Seike;Sayuri Namiki;Tomohiro Ezura;Rina Fitriana;M. S. H. Khan;K. Tawaraya
中科院分区：
文献类型：
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作者：
T. Wagatsuma;T. Otani;N. Seike;Sayuri Namiki;Tomohiro Ezura;Rina Fitriana;M. S. H. Khan;K. Tawaraya
AimsThe的目的，本研究的目的是降解除草剂阿特拉津在含铁介质中使用几个选定的植物物种在circumneutral conditions.MethodsThe浓度的根质外体H2 O2（CRAH）为59种植物主要是使用碘化钾-淀粉定性染色技术进行了测定。具有一系列CRAH值的植物物种被用于阿特拉津degradation.ResultsAt pH 6.5，阿特拉津被立即删除，最显着的菊科植物具有高CRAH（≥ 1.5 mM）的存在下，铁3 +-次氮基三乙酸。在处理过的介质中鉴定了芬顿反应的生物危害较小的降解产物（脱乙基阿特拉津和脱异丙基阿特拉津）。估计菊科植物通过根际芬顿反应去除阿特拉津，这是通过植物吸收的两倍多。这是第一份证明阿特拉津在培养基中被植物根系直接和立即降解的报告。菊科植物的高CRAH与盐/干旱耐受机制和系统进化有关。结论在铁存在下，具有高质外体H2 O2的菊科植物根通过根际芬顿反应在环中性条件下降解阿特拉津。
AimsThe objective of the present study was to degrade the herbicide atrazine in iron-containing media using several selected plant species under circumneutral conditions.MethodsThe concentration of the root apoplastic H2O2(CRAH) for 59 plant species was mainly measured using the potassium iodide-starch qualitative staining technique. Plant species with a range of CRAH values were used for the atrazine degradation.ResultsAt pH 6.5, atrazine was immediately removed and most significantly by Asteraceae plants having high CRAH (≥ 1.5 mM) in the presence of Fe3+-nitrilotriacetate. Less biologically harmful degradation products (deethylatrazine and deisopropylatrazine) of the Fenton reaction were identified in the treated medium. Asteraceae plants were estimated to remove atrazine via a rhizosphere Fenton reaction which was more than twice that via plant uptake. This is the first report demonstrating direct and immediate degradation of atrazine in the medium by plant roots. The high CRAH of Asteraceae plants was connected with salinity/drought tolerance mechanisms and phylogenetic evolution.ConclusionsRoots of Asteraceae plants with high apoplastic H2O2significantly degraded atrazine by transforming to less biologically harmful degradation products in the presence of iron under circumneutral conditions via the rhizosphere Fenton reaction.