ECOLOGICAL FEATURES OF NEMATODES OF MOUNTAIN BIOCENOSES (MT. ZARAFSHAN, UZBEKISTAN)

The purpose of the research: to study the patterns of vertical-zonal distribution of plant nematodes of perennial wild plants, and their ecological features in the conditions of the Zerafshan mountains. The objects of study are nematodes that live in the vegetative organs and their root soil of seven species of wild perennial plants distributed in biocenoses of three high-altitude vertical zones and foothills. For the detection of nematodes, more than 1200 plant and soil samples taken from seven species of wild plants were collected and analyzed: Cousinia integrifolia F., Rumex crispus L., Alhagi kirghisorum Sch., Acroptilon repens L., Phlomis salicifolia Rg., Hordeum bulbosum Torn., and Poa bulbosa L.. Qualitative and quantitative analysis of plant and soil samples collected from 7 species of perennial plants growing in natural biocenoses of three vertical zones and a foothill zone revealed 121 species of nematodes. All detected nematodes belong to two classes (Adenophorea, Secernentea), four subclasses (Enoplia, Chromadoria, Rhabditia, Diplogastria) and eight orders. Among the latter, the order Tylenchida dominates, represented by 59 species. All types of nematodes registered in the vegetative organs of plants and in their root soil, according to their trophic properties, are divided into pararhizobionts, eusaprobionts, devisaprobionts, mycohelminths, nematodes associated with plants and endoparasitic phytonematodes

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