Characterization of Multipurpose Isolate <i>Pseudomonas aeruginosa</i> AMBCD‐1 for Biocontrol and Biodegradation Efficiency

ABSTRACT The goal of the study was to assess the capability of the bacteria Pseudomonas aeruginosa AMBCD‐1 for paddy straw degradation as well as its biological control abilities against the plant wilt pathogen Fusarium . Fourier‐transform infrared spectroscopy (FTIR) data showed that AMBCD‐1 culture‐inoculated treatments dramatically reduced the levels of cellulose, lignin, and hemicelluloses in the deteriorated paddy straw. Additionally, a dual culture technique was utilized to investigate antagonistic activity in vitro using nutritional agar media and potato dextrose agar in equal proportions (1:1) for suppressing the growth of the fungus Fusarium oxysporum and Sclerotium rolfsii in order to assess the biocontrol properties of the chosen bacteria. Following incubation, it was shown that AMBCD‐1 exhibited a 66.67% antibacterial activity against the fungus Fusarium oxysporum . Furthermore, the pyocyanin pigment was also extracted from the P. aeruginosa AMBCD‐1 strain and confirmed at a mass value of 211.2 using liquid chromatography mass spectrometry (LC‐MS), with its standard peak observed at 1.48 min. The results revealed that bacterium P. aeruginosa AMBCD‐1 had the ability to biodegrade paddy straw and also inhibit the appearance of the wilt disease caused by Fusarium species in numerous crops.