Colonization on Cucumber Root and Enhancement of Chlorimuron-ethyl Degradation in the Rhizosphere by Hansschlegelia zhihuaiae S113 and Root Exudates,Journal of Agricultural and Food Chemistry

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Colonization on Cucumber Root and Enhancement of Chlorimuron-ethyl Degradation in the Rhizosphere by Hansschlegelia zhihuaiae S113 and Root Exudates
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-04-19 00:00:00 , DOI: 10.1021/acs.jafc.8b00041
Hao Zhang _{1,

2} , Feng Chen ₁ , Hua-zhu Zhao ₁ , Jia-sen Lu ₁ , Meng-jun Zhao ₁ , Qing Hong ₁ , Xing Huang ₁

Affiliation

The colonization of Hansschlegelia zhihuaiae S113 and its degradation of the herbicide chlorimuron-ethyl in the cucumber rhizosphere was investigated. The results reveal that S113 colonized the cucumber roots (2.14 × 10⁵cells per gram of roots) and were able to survive in the rhizosphere (maintained for 20 d). The root exudates promoted colonization on roots and increased the degradation of chlorimuron-ethyl by S113. Five organic acids in cucumber-root exudates were detected and identified by HPLC. Citric acid and fumaric acid significantly stimulated S113 colonization on cucumber roots, with 18.4 and 15.5% increases, respectively, compared with the control. After irrigation with an S113 solution for 10 days, chlorimuron-ethyl could not be detected in the roots, seedlings, or rhizosphere soil, which allowed for improved cucumber growth. Therefore, the degradation mechanism of chlorimuron-ethyl residues by S113 in the rhizosphere could be applied in situ for the bioremediation of chlorimuron-ethyl contaminated soil to ensure crop safety.

中文翻译：

s花S113和根系分泌物对黄瓜根部的定殖和增强根际中氯嘧磺隆的降解

研究了黄瓜根结线虫汉斯氏菌S113的定殖及其对除草剂氯嘧磺隆的降解作用。结果表明，S113在黄瓜根部定殖（2.14×10 ^5）。个细胞/克的根），并能够在根际中存活（维持20天）。根系分泌物促进根系定植并增加氯嘧磺隆被S113降解。通过HPLC检测并鉴定了黄瓜根分泌物中的五种有机酸。柠檬酸和富马酸显着刺激了黄瓜根上S113的定殖，与对照相比分别增加了18.4和15.5％。用S113溶液灌溉10天后，在根，幼苗或根际土壤中均未检测到氯嘧磺隆，从而改善了黄瓜的生长。因此，根际土壤中S113对氯嘧磺隆残留的降解机理可就地应用于氯嘧磺隆污染土壤的生物修复，以确保作物安全。

更新日期：2018-04-19

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