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FH-1, recognized as<jats:italic>Klebsiella variicola<\/jats:italic>based on phylogenetic analysis of 16S rDNA sequences, can grow with Atrazine which is the sole nitrogen source. In fluid inorganic salt medium, the optimal degradation temperature, pH value, and initial concentration of Atrazine are 25\u00b0C, 9.0, and 50\u2009mg L<jats:sup>\u20131<\/jats:sup>, respectively, and the degradation rate of Atrazine by strain FH-1 reached 81.5% in 11 d of culture. The degrading process conforms to the kinetics equation of pesticide degradation. Among the metal ions tested, Zn<jats:sup>2+<\/jats:sup>(0.2\u2009mM) has the most significant effect of facilitation on the degradation of Atrazine. In the fluid medium with Zn<jats:sup>2+<\/jats:sup>, the degradation rate of Atrazine is increased to 72.5%, while the Cu<jats:sup>2+<\/jats:sup>(0.2\u2009mM) inhibits the degradation of Atrazine. The degradation products of Atrazine by strain FH-1 were identified as HEIT (2-hydroxyl-4-ethylamino-6-isopropylamino-1,3,5-triazine), MEET (2-hydroxyl-4,6-bis(ethylamino)-1,3,5-triazine), and AEEO (4,6-bis(ethylamino)-1,3,5-triazin-2(1H)-one) by HPLC-MS\/MS. Three genes (<jats:italic>atzC<\/jats:italic>,<jats:italic>trzN<\/jats:italic>, and<jats:italic>trzD<\/jats:italic>) encoding for Atrazine degrading enzymes were identified by PCR and sequencing in strain FH-1. This study provides additional theoretical support for the application of strain FH-1 in bioremediation of fields polluted by Atrazine.<\/jats:p>","DOI":"10.1155\/2019\/4756579","type":"journal-article","created":{"date-parts":[[2019,7,28]],"date-time":"2019-07-28T23:30:55Z","timestamp":1564356655000},"page":"1-12","source":"Crossref","is-referenced-by-count":22,"title":["Biodegradation of Atrazine by the Novel<i>Klebsiella variicola<\/i>Strain FH-1"],"prefix":"10.1155","volume":"2019","author":[{"given":"Jinpeng","family":"Zhang","sequence":"first","affiliation":[{"name":"College of Resource and Environment, Jilin Agricultural University, Changchun, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuang","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Resource and Environment, Jilin Agricultural University, Changchun, 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