ANATOMICAL STRUCTURE OF GLYCINE HISPIDA MAX PLANTS UNDER THE INFLUENCE OF BRADYRHIZOBIUM JAPONICUM STRAIN AND RETARDANT

L. A. Golunova

Abstract


The effect of nodule bacteria strain Bradyrhizobium japonicum and the integrated use of the strain and retardant of the triazole class - tebuconazole on linear growth, anatomical structure of Glycine plants and their influence on crop productivity were studied in the field experiment. It was found that both the aplication of Bradyrhizobium japonicum M 8 strain solely and the complex use of the preparations (treatment of the plants with retardant at the beginning of reproductive organ formation, against presowing inoculation of soybean seeds) affected experimental plants’ height, histological parameters of the vegetative organs in comparison with those of untreated control. The use of growth regulators caused changes in the leaf surface area, mesostructural organization of the leaves and accumulation of photosynthetic pigments in them. There were also indicated observable changes in the size of the bark and mechanical tissues of the stem. The effect of the restrictive growth regulators was apparant in the following: the strain of nodule bacteria caused an increase in the linear size of the stem and leaf surface of plants against control. The mutual use of tebuconazole- retardant and strain Bradyrhizobium japonicum led to a decrease in apical dominance of plants, leaf thickness due to increased cell size of wall and spongy parenchymas and intensification of chlorophyll accumulation. Treated plants were characterized by changes in the size of their bark and structural tissues of the stem (collenchyma and sclerenchyma), which is a prerequisite for higher resistance to lodging of plants. The mutual effect of Bradyrhizobium japonicum strain and the triazole preparation proved to be most efficacious among the preparations used. Exogenous application of tebuconazole against the strain of nodule- forming bacteria contributes essentially to the strength of the stem, improves donor functions of Glycine hispida Max, which further secures growth and development of generative organs towards improving yield capasity.

Keywords


Cultural soybean; Bradyrhizobium japonicum strain; leaf mesostructure; mechanical tissues; retardant; productivity

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DOI: https://doi.org/10.25128//2078-2357.20.3-4.13

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