Editing Azotobacter vinelandii (section)

==Variable ploidy==

''A. vinelandii'' can contain up to 80 [[chromosome]] copies per cell.<ref name="pmid2785985">{{cite journal |vauthors=Nagpal P, Jafri S, Reddy MA, Das HK |title=Multiple chromosomes of Azotobacter vinelandii |journal=J. Bacteriol. |volume=171 |issue=6 |pages=3133–8 |year=1989 |pmid=2785985 |pmc=210026 |doi= 10.1128/jb.171.6.3133-3138.1989}}</ref>  However this is only seen in fast growing culture, whereas cultures grown in synthetic minimal media are not [[polyploid]].<ref name="pmid8021173">{{cite journal |vauthors=Maldonado R, Jiménez J, Casadesús J |title=Changes of ploidy during the Azotobacter vinelandii growth cycle |journal=J. Bacteriol. |volume=176 |issue=13 |pages=3911–9 |year=1994 |pmid=8021173 |doi= 10.1128/jb.176.13.3911-3919.1994|pmc=205588|url=http://rua.ua.es/dspace/bitstream/10045/15142/1/JB94.pdf }}</ref>