CHANGE IN LEAF ANATOMICAL PARAMETERS OF SEEDLINGS OF DIFFERENT WHEAT SPECIES UNDER CONDITIONS OF DROUGHT AND SALT STRESS

摘要

There were studied the anatomic parameters of leaves of 10-day-old seedlings of 7 different species of wheat after 72 hours of drought or salt stress and identified key areas of adaptation juvenile leaf tissue to adverse environmental factors. To detect differences between species and between groups of species differing in ploidy level there were identified anatomical features of the structure of each of the leaves of the studied species, grown under normal conditions and under the action of osmotic and salt stress. There were studied anatomical parameters of inner and external surface of the leaf. It was revealed that osmotic stress has an impact on the studied parameters of leaves of all the studied species. Analyzing the data, we can speak of a high adaptive capacity of tetraploid wheat species T. dicoccum Shuebl., T. polonicum L. and T. aethiopicum Jakubz. virtually all considered the anatomical parameters of the leaves. The results of this study show that indicators such as the increase in stress dimensions of protective and mechanical tissue and the mesophyll appear to be good criteria for selection of stress resistant forms of wheat.