Selection of valine-resistance in callus culture of Arabidopsis thaliana (L.) Heynh. derived from leaf explants

Małgorzata D. Gaj, Grzegorz Czaja, Małgorzata Nawrot

Abstract


The selection of valine-resistant mutants was carried out in leaf explant cultures of three Arabidopsis thaliana (L.) Heynh. ecotypes: C-24, RLD and Columbia. The valine concentration used for in vitro selection, lethal for seed-growing plants, has not affected callus formation and growth. However, strong inhibition of shoot regeneration ability of calli growing under selection pressure was noticed. In total, 1043 explants were cultured on valine medium and 18 shoots were regenerated with an average frequency of 1.7 shoots per 100 calli. Most R1 shoots were sterile and seeds were collected from 3 plants. The transmission of valine-resistance to the sexual progeny of these plants was scored and the increased level of valine-resistance was found in progeny of one line - 61 C. This line originated from the culture of Columbia leaf explant and displayed tetraploid chromosome number.

Keywords


Arabidopsis thaliana; biochemical mutants; in vitro selection; somaclonal variation; valine resistance.

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DOI: https://doi.org/10.5586/asbp.1999.028

Journal ISSN:
  • 2083-9480 (online)
  • 0001-6977 (print; ceased since 2016)
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Polish Botanical Society