detailed microscopic view of nitrogenfixing azorhizobium caulinodans bacteria within a legume root nodule a symbiotic

azorhizobium caulinodans rhizobia nitrogenfixing bacteria root nodules microscopy microbiology scientific microorganism legume plantmicrobe interaction soil microscopic bacterial culture cell biology prokaryotes gramnegative nitrogen fixation plant growth agricultural biological research microbe science symbiosis biotechnology morphology structure world environmental visualization detailed clear analysis specimen nutrition health crops symbiotic relationship cycle microbial ecology applications