Obtaining genetically modified winter wheat plants with partial suppression of the prolin dehydrogenase gene

Abstract

Aim. Production of genetically modified plants of new promising winter wheat genotypes with partial suppression of the proline dehydrogenase gene in in vitro culture and determination of proline content in transgenic and control plants. Methods. Agrobacterium-mediated transformation in culture in vitro, molecular genetic analysis; biochemical determination of proline content; of mathematical statistics. Results. Using the method of Agrobacterium-mediated transformation of callus cultures of new promising genotypes of winter wheat, transgenic plants carrying a double-stranded RNA suppressor of the proline dehydrogenase gene were obtained. The frequency of transformation with the use of the LBA 4404 strain in the studied genotypes was 1.7-2.0 %, and with the use of the AGL0 strain, it was 2.0-2.3 %. It was established that plants with reduced activity of proline dehydrogenase are characterized by a significantly higher content of free L-proline compared to the control. Conclusions. The relatively greater efficiency of using the AGL0 strain for obtaining transgenic plants of winter wheat genotypes with partial suppression of the proline dehydrogenase gene in in vitro culture is shown. The presence of a double-stranded RNA suppressor of the ProDH gene in transgenic plants leads to an increase in the level of free L-proline accumulation.