Ontogenesis and Ontogenetic Structure of Hordeum Bulbosum in Uzbekistan (Poaceae L)

Abstract

Shakhnoza U. Saribaeva, Maxmudov Valijon, Ozodbek S. Abduraimov, Maxmudov V. Azizbek, Akmal L. Allamuratov, Mavlanov Begzod and Odilbek Mamatqosimov

With the destruction of natural ecosystems, wild relatives of cultivated plants, the diversity of which ensures food security for the growing population of the Earth, are irretrievably disappearing. Changes occurring in nature, and in particular climate warming, are the most common of the various threats to the planet's biological diversity. In this regard, the conservation of plant genetic resources as part of natural communities - in situ - becomes an urgent task. The purpose of our study is to identify the ontogeny and ontogenetic structure of Hordeum bulbosum in the changing mountain conditions of Uzbekistan. The phytocenotic characteristics of the cenopopulations were established and the age status of the studied species was assessed. The ontogeny of Hordeum bulbosum is characterized by a simple complete ontogeny. The duration of the large life cycle is 10-11 years. The ontogenetic spectra of Hordeum bulbosum have been revealed. The studied coenopopulations are normal, but incomplete. The absence of seedlings (CP 5, 7, 8) and senile (CP 7, 8) fractions is associated with the irregularity of seed propagation and the inability of the species to go through the stages of ontogenesis. The main threat is climate change and anthropogenic influence on plant cenopopulations.

PDF