Adaptation of meristem strawberry plants in <i>ex vitro</i> conditions use of an Emistim

The article presents data on the influence of the elicitor Emistim on the process of adaptation of meristem plants of garden strawberries to non-sterile conditions. The objects of the study were micropropagated strawberry plants of six industrial varieties: Asia (NF 421), Darselect, Florence, Honeoye, Kimberly, Syria (NF 137). The use of emistim solution at the stage of planting strawberry plants in vitro in non-sterile conditions made it possible to increase the yield of adapted plants for individual genotypes to 100%. The maximum yield of adapted plants was noted in the Florence variety with all methods and periods of exposure to Emistim. On average, for varieties, biometric indicators for all methods of treating plants with Emistim exceeded the control indicators, the adaptation period was reduced by 5-7 days. The maximum number of leaves after 30 days of adaptation was formed under the influence of Emistim within 1 hour (6.4 ± 0.3). The length of the roots after 30 days of cultivation exceeded the control indicators by 10–18%, after 40 days – by 15–25%. The optimal method of plant treatment can be considered soaking the basal part of strawberry rosettes in a solution of emistim for 1 hour. The possibility of enhancing the immunity of strawberry plants obtained in vitro at the stage of adaptation to non-sterile environmental conditions and during the period of growing with the help of a new generation preparation Emistim, which has a positive effect on their growth and development, was revealed. The results of the studies allow us to recommend this technology for use in the system of mass production of high-quality strawberry planting material.