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This paper presents the results of research of Tripogon chinensis adaptation mechanisms to the environmental conditions. This relict cereal grows on petrophytic parts of the slopes, where it is affected by extreme environmental factors (temperature variations, lack of water, insolation, etc.). This cereal reproduces by seeds. Under such growth conditions, to be able to germinate and continue growing, the plant must effectively use the available moisture and the seed storage compounds. Experiments with seeds germinated under different moisture conditions showed the ability of T. chinensis seeds to germinate in substrates with widely varying moisture contents. Increased moisture adversely affected the process of germination and growth of the cereal. Seed storage proteins play a special role because they are used as source of amino acids for the synthesis of proteins necessary for the plant. Determination of the fraction composition of T. chinensis seed storage proteins showed the high content of albumins and globulins (45% of the total weight of storage proteins), which ensured germination under water deficit. The study showed that germinating T. chinensis seeds use prolamins (their concentration decreases fourfold during germination). The considerable prolamin content of seeds (37%) and prolamin dynamics during germination support the hypothesis on the adaptive role of prolamins, as they contain amino acids essential for the seedling. Thus, morphological, physiological and biochemical properties of this cereal characterize it as a xerophytic species, which developed due to a combination of environmental factors of the Eastern Transbaikal region.

Seed Germination and Initial Stages of Tripogon chinensis (Poaceae) Ontogenesis