azote bacterialgenetics bacterialphysiologicalphenomena biologiemoléculaire congresses fixation fixaçãodenitrogênio geneticengineering genetics genomas genomics microbialgeneticengineering molecularbiology nitrogen nitrogen-fixingmicroorganisms nitrogen-fixingplants qu55b963n1975 qu70 qu70b6151992 qu70c748g1977 qu70n7311981 qz15w5161973r w3ke433d1978n[qu70k431978n]