Enhancing arsenic removal from arsenic-contaminated water by Echinodorus cordifolius-endophytic Arthrobacter creatinolyticus interactions.
Enhancing arsenic removal from arsenic-contaminated water by Echinodorus cordifolius-endophytic Arthrobacter creatinolyticus interactions.
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DOI：
10.1016/j.jenvman.2018.02.060
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发表时间：
2018-05
影响因子：
8.7
通讯作者：
Channratha Prum;R. Dolphen;P. Thiravetyan
中科院分区：
文献类型：
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作者：
Channratha Prum;R. Dolphen;P. Thiravetyan
在本研究中，与互花莎草、顶花莎草和绿花莎草相比，紫棘草是去除砷效果最好的植物。在砷胁迫下，e。研究了细菌（枯草芽孢杆菌和关节细菌溶肌酸杆菌）对大肠杆菌的影响。人们发现……溶肌酸菌是一种天然微生物，具有较强的抗砷毒性，其吲哚- 3乙酸（IAA）和氨的产量均高于b。细小。有趣的是,E。cordifolius−endophyticA。肌酐溶酶的相互作用表明，植物根系中溶酶含量下降。肌酸溶菌悬浮液处理5 min的除砷效率最高。肌酐溶解液悬浮2 h，接种1。creatinolyticuswithE。cordifoliusdirectly。研究结果表明，在这种接种条件下，接种体可以从根向寄主组织的茎部定植，从而避免砷毒性，有利于寄主通过产生IAA等促进植物生长的性状去除砷。IAA在植物组织中含量最高，根系伸长率高于其他处理。此外，低水平的活性氧（ROS）与低砷胁迫有关。此外，蘸料。cordifoliusroots艾娜。在人工湿地中应用5 min溶肌酶，其除砷效果优于常规方法。因此，这些知识可以在实际现场应用，以提高植物的耐受性胁迫，促进植物生长，加强砷的修复。
In this study,Echinodorus cordifoliuswas the best plant for arsenic removal compared toCyperus alternifolius,AcrostichumaureumandColocasia esculenta. Under arsenic stress, the combination ofE. cordifoliuswith microbes (Bacillus subtilisandArthrobactercreatinolyticus) was investigated. It was found thatA. creatinolyticus, a native microbe, can endure arsenic toxicity, produce higher indole−3 acetic acid (IAA) and ammonium production better thanB. subtilis. Interestingly,E. cordifolius−endophyticA. creatinolyticusinteractions showed that dipping plant roots inA. creatinolyticussuspension for 5 min had the highest arsenic removal efficiency compared to dipping plant roots inA. creatinolyticussuspension for 2 h and inoculatingA. creatinolyticuswithE. cordifoliusdirectly. Our findings indicated that under this inoculation condition, the inoculum could colonize from the roots to the shoots of the host tissues in order to avoid arsenic toxicity and favored arsenic removal by the host through plant growth-promoting traits, such as IAA production. Highest levels of IAA were found in plant tissues and the plants exhibited higher root elongation than other conditions. Moreover, low level of reactive oxygen species (ROS) was related to low arsenic stress. In addition, dippingE. cordifoliusroots inA. creatinolyticusfor 5 min was applied in a constructed wetland, the result showed higher arsenic removal than conventional method. Therefore, this knowledge can be applied at a real site for improving plant tolerance stress, plant growth stimulation, and enhancing arsenic remediation.