Перехресна стійкість клітинних ліній  та рослин-регенерантів тритикале озимого  до абіотичних стресових чинників

С. В. Пикало; О. В. Дубровна

doi:10.21498/2518-1017.13.4.2017.117746

Authors

С. В. Пикало The V. M. Remeslo Myronivka Institute of Wheat, NAAS of Ukraine, Ukraine https://orcid.org/0000-0002-3158-3830
О. В. Дубровна Institute of Plant Physiology and Genetics, NAS of Ukraine, Ukraine https://orcid.org/0000-0002-4884-7572

DOI:

https://doi.org/10.21498/2518-1017.13.4.2017.117746

Keywords:

winter triticale, osmotic stress, saline stress, resistance, cell lines, plant regenerants

Abstract

Purpose. To analyze the level of cross-resistance of obtained salt- and osmotolerant cell lines and plants regenerants of winter triticale to osmotic and salt stresses.

Methods. Cultures of tissue and organs in vitro, in vitro breeding, biochemical, statistical analysis.

Results. It was established that the stability of cross-resistance trait display to saline and osmotic stresses in obtained cell lines of winter triticale was rather high – from 50 to 76% of calli have survived to the end of the sixth passage. It has been shown that despite the presence of sublethal concentrations of the stress-factor (mannitol/sodium chloride) in selective medium, stable cell lines of the triticale actively continued to grow and accumulate biomass. It was found that in the line ‘38/1296’ cell lines 5L/sl and 5L/os respectively were the most resistant to osmotic and salt stresses, and lines 1C/s1 and 1C/os respectively in the ‘Obrii’ variety, since they had the highest percent of living calli and biomass increment under the selective conditions and their plant regenerant – the highest level of survival after the impact of the abiotic stressors complex. The salt-resistant cell lines of both genotypes of winter triticale as compared to the control were also characterized by significantly higher free proline content under the selective factors impact. The results obtained may indicate that the cell lines and triticale plant regenerants have a genetically determined trait of resistance to stress factors.

Conclusions. Verification of traits of resistance to abiotic stressors has shown a significantly high level of cross-tolerance of the obtained cell lines of both triticale genotypes for saline and osmotic stresses. Resistance to saline and osmotic stresses of cells separated in vitro was preserved in induced plants and at the organism level has increased tolerance to abiotic environmental factors. It is shown that due to the general non-specific mechanisms of resistance, the capacity of the callus cultures of triticale to resist to one abiotic stressor can lead to increased tolerance for another one.

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Author Biographies

С. В. Пикало, The V. M. Remeslo Myronivka Institute of Wheat, NAAS of Ukraine

Pykalo, S. V.

О. В. Дубровна, Institute of Plant Physiology and Genetics, NAS of Ukraine

Dubrovna, O. V.

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