Research in the Field of Anatomical Vegetative Organs of Cotton

This article presents data from scientists who have studied and are currently studying the morphology and structural features of cotton peel. Information is provided on the shape, size, and ultrastructure of the seed surface, including the structure and height of the outer and inner integuments. The studies involved both cultivated varieties and accessions, as well as wild diploid and tetraploid species and their subspecies from various habitats. During the study, a cross-section of cotton leaves was also analyzed. The height and dimensions of the various tissues that make up the cotton leaf were determined. As a result, a pattern was identified that correlates with the tolerance of leaves to pests. And so, if the mesophyll structure has an isolateral type of structure, then the possibility of tolerance to piercing-sucking parasites increases. The studied representatives have a dorsiventral type of mesophyll. And this, in turn, does not help protect the leaf from the penetration of the aphid stylet into the spongy parenchyma and the sucking of nutrients from the sieve tubes of the vascular bundles located closer to the abaxial side of the leaf, as well as the mesophyll. transport cells rich in metabolic products. The height of the columnar parenchyma in all studied representatives is quite high, but it is possible that tolerance is influenced not by the thickness of the columnar layer itself, but by the difference between the thicknesses of the spongy and columnar parenchyma, and the thickness of the spongy parenchyma should not exceed 98.5 microns. Thus, that among the studied representatives, the most tolerant representatives to insect pests will be G. herbaceum ssp frutescens 2n=56, A-833 2n=56.