Abstract
The regulator of anti-stress action Epin-Extra (24- epibrassinolide) was tested in laboratory and field (protected ground) conditions. The aim of this rese arch was to study the influence of growth regulator s on the growth, development and productivity of improved initial promising varieties of potato: Native (cultivated varieties Udacha) and foreign (cultivat ed varieties Red Scarlett) selections obtained by t he method of apical meristem in the Volga-Vyatka regio n. The obtained results suggest a promising use of the product for improving the growth and development of plants in vitro . Adding Epin-Extra into an artificial culture medium at the final stage of micropropagati on in vitro increases the height of plants by 29.6-47.7%, the number of internodes in plants by 26.4-25.7% de pending on the cultivated variety, increases the ro ot growth for cultivar Udacha 2.1 times and reduces th e one for the cultivar Red Scarlett 1.9 times. The use of the Epin-Extra product-in recommended concentration for growing mini-tubers by seedling method in protected soil (greenhouse) in the budding phase-in creases the biometric indicators such as plant heig ht (35.7-21.8%), number of stems in the bush (30.9-19. 0%) and mass of roots (19.1-8.5%), depending on the variety. As a result, the treatment with Epin-Extra increases productivity by 25.6-15.9%, the multipli cation factor by 25.3-18.4%, as well as helps to reduce th e prevalence (by 69.5-44.1%) and development (by 50.044.3%) of the late blight on the tops of potato pla nts, depending on the cultivar.
Highlights
In order to provide a sustainable potato production, increasing the productivity of cultivated plants the improvement of its seeds quality is of great importance
The aim of this research was to study the influence of growth regulators on the growth, development and productivity of improved initial promising varieties of potato: Native and foreign selections obtained by the method of apical meristem in the Volga-Vyatka region
Adding Epin-Extra into an artificial culture medium at the final stage of micropropagation in vitro increases the height of plants by 29.6-47.7%, the number of internodes in plants by 26.4-25.7% depending on the cultivated variety, increases the root growth for cultivar Udacha 2.1 times and reduces the one for the cultivar Red Scarlett 1.9 times
Summary
In order to provide a sustainable potato production, increasing the productivity of cultivated plants the improvement of its seeds quality is of great importance This problem is successfully solved in virus-free system of potato plant propagation (Tarazanova and Ignatiev, 2013; Mohapatra et al, 1993; Korp, 1989; Harmey et al, 1966). Those growth regulators include the compounds of brassinosteroids through the application of biotechnological techniques of class-naturally occurring plant hormones (Kagale, 2007). Thereby, the aim of our research is to determine the influence of the Epin-Extra growth regulator on the growth and development of the meristem plants and their productivity if the mini-tubers are being grown up in protected soil (greenhouse)
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