Visn. Hark. nac. agrar. univ., Ser. Biol., 2021, Issue 2 (53), p. 23-40


L. Ye. Kozeko, E. L. Kordyum

Kholodny Institute of Botany

of the National Academy of Sciences of Ukraine

(Kyiv, Ukraine)


Evaluation of the plant state in a variable environment is the primary problem of plant biology and ecology in the today's realities of ecologic and climatic changes. The search for universal biomarkers that would make it possible to determine the state of plants regardless of nature of stress factors is urgent. On the basis of literature data and the results of own studies, it has been shown that heat shock proteins 70 kDa (HSP70) meet the criteria for this biomarker. This family of chaperones is present in virtually all organisms, including plants. Their induction is an indicator of cellular proteostasis disturbance and an integral component of stress response and adaptation of an organism to adverse environmental changes. The high homology of these proteins allows using monoclonal antibodies for their immunodetection in various taxa, which was demonstrated for 11 plant species of 8 families. Testing species, different in their ecology, under contrasting conditions of temperature and water regimes in nature and experiments confirmed the effectiveness of HSP70 as a biomarker. A method for determining the state of plants of natural phytocenoses and introduced plants has been developed. It includes an assessment of physiological state of a plant and influence of environmental factors on it by HSP70 content in leaves. The ways of further improvement of this approach for its use in complex research are considered.

Key words: plant state, environmental change, stress, heat shock proteins HSP70, biomarker



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