Research article
Issue: № 5 (25), 2022


The transfer of plants from in vitro to ex vitro conditions is the final and most stressful stage for microplants, which determines the success of the whole work. At this stage, up to 80% of the planting material often dies, since in vitro plants must adapt to non-sterile ex vitro conditions, which differ significantly from in vitro cultivation conditions (high humidity, carbon dioxide deficiency). The article presents the results of a study of the influence of coconut substrate on the morphological development of microplants of clonal rootstocks of fruit crops obtained by micropropagation. The objects of the study were clonal stocks of American and European selection used for laying intensive and super-intensive orchards – MaxMa14 (cherry), GF677 and Garnem15 (almond, peach, nectarine), Myrobalan 29C (plum, cherry-plum, apricot), OHF87 (pear, quince), Madrasa and Bayan Shirey (local Azerbaijani varieties of grapes). As a result of the study, it was found that, in general, the coconut substrate had a positive effect on the morphological development of regenerated plants. The substrate contributed to the intensification of the growth processes of the aerial and root parts of plants. Rootstock Garnem 15 showed the highest percentage of adapted plants (86,4%). Rootstock GF 677 was distinguished by a good stem formation of 3,8 cm and the longest roots of 3,54 cm. A largest number of formed roots was noted in MaxMa14 regenerated plants – 4,3 pcs.

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