O. P. Taran, L. M. Babenko, O. V. Moshynets, S. P. Rogalsky, O. V. Lobova, O. V. Matskevich


Regeneration of the explants and stimulation of calusogenesis are topical tasks of modern biotechnology of plants. In this paper, the phyto-stimulating effect of the molecule of the class of acylgomoserinlactones (AGL), a common class of bacterial signaling molecules, which is involved in the remote transduction of signals between phytosphere bacterial colonizers and directly between bacteria and plant, is investigated. The aim of the work was to evaluate the effect of treatment of short-chain AGL – N-hexanoyl-L-homoserinlactone (HGL) the explants of  the cotyledons of squash Cucurbita pepo var. giraumonti on callusogenesis in vitro. Treatment with the solution of HGL and DMSO (solvent) was carried out under aseptic conditions, immersing explants in solutions of substances for 30 minutes. Indeterminate cotyledonous plants that were cultivated in vitro, were planted for medium  with aga-agar for callusogenesis and cultured witout the light at 25 ℃. In the experiment, all explants formed a loose callus of cream color. In explants,  treated with HGL, a significant increase in the raw and dry weight of callus was established. The callus proliferation in the variant  with AGL was started several days earlier than in the control variant. Taking into account the positive effect of the use of HGL on proliferation and the growth of callus culture in the first stage of callusogenesis of the explants squash, further research on the stimulating effects of HGL is promising, in particular, to optimize plant growth protocols in vitro and to create effective regeneration systems.

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