Biomics

The trolC gene refers to plast genes that have entered the genome of Nicotiana tabacum as a probable result of horizontal transfer from Agrobacterium rhizogenes. It was shown that the trolC gene is expressed in young tissues of wild type tobacco; however, the physiological functions of the product of this gene remain largely unknown. The aim of our work was to obtain transgenic tobacco plants expressing a fragment of the trolC gene under the control of the 35SCaMV promoter in an antisense orientation and to assess the growth parameters of their roots under the action of abiotic stress factors. For morphometric analysis, 8 lines of transgenic plants were used. The analysis of root growth under the action of sodium chloride (100 mM), cadmium acetate (100 μM) and hypothermia (12°C) was conducted. Transgenic plants were characterized by improved shoot growth parameters under normal conditions. The roots of transgenic plants grew more slowly under normal conditions and under the action of cadmium and hypothermia than in wild type plants. The product of trolC gene has a negative effect on shoot growth, a positive effect on root growth, and also participates in the regulation and maintenance of root growth under the action of cadmium and hypothermia.

Nicotiana tabacum, trolC, rol-genes, rolC, Agrobacterium rhizogenes, plast genes, stress tolerance

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