FEATURES OF THE MESOSTRUCTURAL ORGANIZATION OF THE LEAVE AND THE ANATOMICAL STRUCTURE OF THE TOBACCO STEM UNDER THE ACTION OF GROWTH STIMULATORS

O. Talalayeva, V. Rohach, V. Kur’jata, T. Rohach
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Abstract

Tobacco plants of Ternopil 14 variety were treated with growth stimulants 1-NAA, GA3 and 6-BAP in the budding phase. Under the influence of growth stimulants, tobacco leaf blades thickened due to the growth of chlorenchyma. The greatest increase in leaf thickness was found after the application of GA3. 1-NAA and GA3 increased the volume of columnar parenchyma cells. The size of the cells of the spongy parenchyma under the action of growth regulators did not change significantly. It was found that 1-NAA reduced the number of epidermal cells and the number of stomata per unit abaxial surface of the leaf, and under the action of 6-BAP, these indicators increased authentically. GA3 increased the number of epidermal cells and decreased the number of stomata. All growth stimulants reduced the area of the stomata. Growth stimulants thickened the collenchyma layer and increased or did not change the size of sclerenchymal fiber cells. The thickness of the shells of sclerenchyma cells increased significantly only with the use of 6-BAP. Under the action of other growth stimulants, this indicator had only a tendency to increase. 1-NAA and 6-BAP increased the thickness of the secondary layer and decreased the primary periderm. Under the action of GA3, the layers of the primary and secondary periderm became thinner. The drugs increased the thickness of the xylem and the diameter of the largest vessels.
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生长刺激物作用下烟叶细观结构组织特征和烟茎解剖结构特征
在出芽期用促生长剂1-NAA、GA3和6-BAP处理烟草植株。在生长刺激剂的作用下,烟草叶片因绿组织的生长而增厚。施用GA3后叶片厚度增加幅度最大。1-NAA和GA3使柱状薄壁细胞体积增大。生长调节剂作用下海绵薄壁细胞的大小变化不明显。结果表明,1-NAA降低了叶片单位背表面表皮细胞数和气孔数,而在6-BAP的作用下,这两项指标真实地增加了。GA3增加了表皮细胞数量,减少了气孔数量。所有的生长刺激物都减少了气孔的面积。生长刺激物使厚壁细胞增厚,增加或不改变厚壁纤维细胞的大小。仅使用6-BAP,厚壁细胞的壳层厚度明显增加。在其他生长刺激剂的作用下,该指标只有增加的趋势。1-NAA和6-BAP增加了第二层的厚度,减少了初级周皮。在GA3的作用下,初生周和次生周的层数变薄。药物增加了木质部的厚度和最大血管的直径。
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