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Influence of nitrate, phosphate and herbicide stresses on nitrogenase activity and growth of cyaobacteria isolated from paddy fields

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Date

2007

Author

Kurucuoğlu, Ökmen Gülten
Dönmez, Gönül
Dönmez, Sedat

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Abstract

Samples were collected from paddy fields in Corum-TURKIYE. Nitrogen-free BG-11 medium was used for isolation of nitrogen fixing cyanobacteria. Acetylene reduction technique was used to determine the effects of different chemical agents on the nitrogenase activities of the cyanobacteria, which were identified at the genus level. Nodularia showed the highest nitrogenase activity (0.006 ethylene ul/ mg.h) at lOmM nitrate concentration. At 25mM phosphate concentration, Nodularia showed the highest nitrogenase activity (0.006 ethylene ul/ mg.h ). The highest tolerances for the herbicides were present in Nodularia (0.06 ethylene ul/ mg.h) for bensulphuron (50ug /ml) and Nostoc 6 ethylene ul/ mg.h (for molinate lOOug / ml).

Source

Journal of Applied Biological Sciences

Volume

1

Issue

1

URI

https://app.trdizin.gov.tr//makale/TnpNeE5qWTI
https://hdl.handle.net/20.500.12809/8685

Collections

  • Biyoloji Bölümü Koleksiyonu [278]
  • TR-Dizin İndeksli Yayınlar Koleksiyonu [3005]



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