Notice of RetractionComparative study on the responses to NaCl stress in the wild and hydroponic Nostoc flagelliforme

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The responses to NaCl stress in the wild and hydroponic Nostoc flagelliforme were compared in vitro. N. flagelliforme was cultivated with NaCl (0%, 0.4%, 0.8%, 1.2%, 2.4% and 4.8%, w/w) on BG-11 medium for 24 h and 72 h respectively. The electrolyte leakage, contents of Malondialde-hyde (MDA), soluble protein and trehalose of both hydroponic N. flagelliform and wild N. flagelliforme increased under low NaCl concentrations (0.4-1.2%) and then decreased with further increasing NaCl concentrations, but the SOD activity of wild N. flagelliforme followed a decreasing trend under NaCl stress treatment for 72 h. Both the proline contents of hydroponic and wild N. flagelliforme were not significant increased under salt stress for 24 h and 72 h. The MDA content and electrolyte leakage of wild N. flagelliforme were significantly higher than those of hydroponic N. flagelliforme, and the SOD activity and contents of proline, soluble protein and trehalose were lower in wild N. flagelliforme than those in hydroponic N. flagelliforme. The results show that hydroponic N. flagelliforme is more salt-tolerant than wild N. flagelliforme.