Nitrogen utilization and transformation ofStenotrophomonas maltophiliaW-6 with nitrogen-fixing ability

Abstract

14Strain W-6 was isolated from the purple soil and successfully identifed as 15Stenotrophomonas maltophilia and used for the investigation on nitrogen utilization. 16Strain W-6 was monitored with the ability of biological nitrogen fixation when N 2 was 17 used for the sole nitrogen source, and yet nitrogenase activity would be inhibited in the 18 presence of extra nitrogen. Moreover, Strain W-6 could utilize NO 3 -, NO 2 -and NH 4 + for 19 cell growth through assimilation, but unable to convert them to atmospheric nitrogen. 20Meantime, accumulation of nitrite was observed during the nitrate removal process, and 21. CC-BY-NC-ND 4.0 International license It is made available under a was not peer-reviewed) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.The copyright holder for this preprint (which . http://dx.doi.org/10.1101/337386 doi: bioRxiv preprint first posted online Jun. 3, 2018; 2 the optimal conditions for nitrate removal were temperature of 20℃, shaking speed of

Rhizospheric PGPR Strains of Wheat, Barley and Trefoil Grown in Ağrı Province

“…A study by Tara and Saharan [36] revealed that Brevibacterium frigrotolerans SMA23 isolated from Aloe vera rhizosphere have multiple plant growth promotion properties such as phosphate solubilization, IAA production and siderophore production. A study by Wang et al [37] revealed that Stenotrophomonas maltophilia W-6 have nitrogen-fixing capability. In the study by Habibi et al [15] were found to strains of Enterobacter ludwigii have IAA production, phosphate solubilizing and siderophore production capabilities.…”

Microorganisms as bio‐filters to mitigate greenhouse gas emissions from high‐altitude permafrost revealed by nanopore‐based metagenomics

“…It can utilize NH 4 + , NO 2 − , and NO 3 − through assimilation, but it cannot convert them to nitrogen. In addition, it can fix nitrogen when N 2 is the sole nitrogen source [ 38 ]. Our RNA‐seq data of thawed permafrost microbiome also revealed its active involvement in nitrate ammonification (Figure 3 ), expending metabolic potentials of this interesting soil genus and highlighting the influence of nitrogen content on the permafrost community.…”