Cold tolerance of potato plants transformed with yeast invertase gene
2013
Deryaabin, Alexander N. | Dubinina, Irena M. | Burakhanova, Elena A. | Astakhova, Nina V. | Sabel´nikova, Elena P. | Sinkevich, Maxim S. | Trunova, Tamara I.
Our study was carried out with potato plants (Solanum tuberosun L.,cv. Désirée) transformed with the yeast invertase gene under the control of the B33 class I patatin promoter and with the proteinase inhibitor II leader peptide sequence providing for the apoplastic enzyme localization (B33-inv plants) and with the plants transformed with the reporter gene encoding bb-glucuronidase under the control of the 35S CaMV promoter (control plants). Exposure to 5°C during 6 days caused an increase in invertase activity and sugar content in B33-inv leaves in comparison with the control plants. Cell membranes of B33-inv plant cells showed greater cold tolerance under low temperature conditions than control plants that was recorded by electrolyte release. We supposed that higher cold tolerance of B33-inv plants was caused by stabilizing effect of sugar on the membranes, because B33-inv plants differ from the control plants in higher invertase activity, induced by expression of yeast invertase gene, and high content of sugars.
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