ADAPTIVE POTENTIAL PERFORMANCE OF REPRESENTATIVES OF THE TRIBE Triticеae L.

61 Among the major Ukrainian food and industrial crops there are Triticum aestivum L. (common wheat), Secale cereale L. (winter rye), Triticum trispecies Shulind (winter triticale) of the tribe Triticeae. Increasing the genetic potential of the new varieties’ productivity reduced the scope of their adaptation to certain conditions, tapering heterogeneity [1, 2]. Therefore creating varieties of winter crops that are able to overcome the negative correlation between yield and adaptive potential is a key issue today. Various kinds of stressors cause structural and metabolic changes in plants [3]. Knowledge of the mechanisms that underlie their reactions to prolonged abiotic stress factors, and condition the crop stability is important in understanding the fundamentals of adaptation, developing approaches for obtaining resistant varieties and forms of plants, especially in present global warming and arid climate, long spring and summer and autumn drought, adverse winter conditions, significant fluctuations in winter temperatures, thaws alternating with ice crust formations and damping-out, etc. [3–6]. Topical questions are adaptation of cultural species to current environmental conditions to which the plants are able to produce protective mechanisms signalizing not only the stress, but also before and after stress periods [7–9]. The aim was to investigate the mechanisms of adaptation performance of the representatives of tribe Triticeae L. according to biochemical markers.