Effect of Paraquat on growth of diazotrophic strain Stenotrophomonas maltophila in flooded soil

Radziah Othman
2012 African Journal of Microbiology Research  
A laboratory study was conducted at Universiti Putra Malaysia to determine the effect of commonly used herbicide Paraquat (full dose, half dose and double of the full dose) on growth of locally isolated diazotroph, Stenotrophomonas maltophila (Sb16), its nitrogen fixation and indoleacetic acid production in flooded soil. Recommended dose of Paraquat showed no significant effect on Sb16 population, nitrogen accumulation and indoleacetic acid (IAA) production. Populations of Sb16 in soil and soil
more » ... 16 in soil and soil standing water, fluctuated significantly during six weeks of sampling time. The pH of soil standing water positively correlated with the nitrogen content (2.0 %). Double doses of Paraquat significantly reduced indoleacetic acid production both in soil and standing water. Application of Paraquat at recommended dose had no adverse effect on growth and activity of diazotrophic strain Sb16 isolated from tropical soil of Malaysia.
doi:10.5897/ajmr11.1556 fatcat:qj52zuz2i5cwtp5r2siyir6ad4