Abstract
DNA cassette consisting of an Arabidopsis dehydration-responsive element binding factor 1 (DREB1B) cDNA, driven by a cauliflower mosaic virus 35S promoter, was introduced into potato plants (Solanum tuberosum L.) through Agrobacterium tumefaciens-mediated gene transfer. The presence and expression of the gene in transgenic plants were confirmed by the PCR and RT-PCR techniques, respectively. Northern hybridization using a DREB1B cDNA probe revealed high levels of DREB1B expression among the most transgenic lines. Overexpression of DREB1B imparted a significant freezing and drought tolerance gain in the transgenic potato lines. In comparison with the wild-type plants, the transgenic potatoes contained higher proline content under drought and freezing conditions, and maintained their relative water content higher under water stress. The enhancement of tolerance in transgenic potato highlights the presence of genes responding to the transcription factor DREB1B in this plant.
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Abbreviations
- bp:
-
base pair
- DREB:
-
dehydration responsive element binding protein
- PCR:
-
polymerase chain reaction
- SR:
-
survival rate
- WC:
-
water content per dry mass unit
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Movahedi, S., Sayed Tabatabaei, B.E., Alizade, H. et al. Constitutive expression of Arabidopsis DREB1B in transgenic potato enhances drought and freezing tolerance. Biol Plant 56, 37–42 (2012). https://doi.org/10.1007/s10535-012-0013-6
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DOI: https://doi.org/10.1007/s10535-012-0013-6