Abstract
The aim of the research is to conduct a comparative assessment of the biochemical status of roots and the influence of physiologically active compounds on the formation of the root system of phylloxera-tolerant grape varieties. It was established, that the hormonal status and the content of BAS in the root system of phylloxera-tolerant varieties of interspecific origin are different. It is assumed that the different survival rate of cuttings of V. vinifera L. varieties and varieties of interspecific origin are due to different hormonal status, in particular, the level of endogenous auxins and the degree of gene expression, including exogenous use of auxin drugs. On varieties of interspecific origin, with the non-root use of a solution of FAS based on cytokinin, auxin and trophic factor, in a ratio of 10:1:25, the formation of a powerful root system, an increase in the number of heel roots and the number of roots with a large diameter, an increase in the trophic potential of the elements of the root system compared with the pre-planting use of auxin preparation (NUC) is observed. this will contribute to the better development and early fruiting of root-related plants in the following years.
Highlights
It is known that the transition to a grafted grape culture did not allow solving the problem of phylloxera in full and at present it remains relevant
We consider it urgent to study the influence of physiologically active compounds on the quality of planting material when processing the leaf surface of plants at the initial stages of the formation of the root system
The formation of the root system in grape cuttings and morphological elements of the future plant is undoubtedly determined by a number of external and internal factors, including the ratio of hormones and various biologically active substances of organic nature, formed in the leaves of a young plant at the very beginning of the formation of elements of the root system [6,7,8,9,10,11]
Summary
It is known that the transition to a grafted grape culture did not allow solving the problem of phylloxera in full and at present it remains relevant. The use of growth regulators is one of the most common ways to increase the quantitative yield of planting material, and the auxin preparation NAA is the most active physiologically [5]. It should be noted that cuttings of the phylloxera-immune Vitis rotundifolia species practically do not take root. We consider it urgent to study the influence of physiologically active compounds on the quality of planting material when processing the leaf surface of plants at the initial stages of the formation of the root system
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