Влияние низкотемпературного стресса на генерацию активных форм кислорода, содержание низкомолекулярных антиоксидантов и активность специфической к фенолам пероксидазы в зеленых листьях ячменя (Hordeum vulgare)
2009
Radyuk, M.S. | Domanskaya, I.N. | Shcherbakov, R.A. | Shalygo, N.V., National Academy of Sciences, Minsk (Belarus). Institute of Biophysics and Cell Engineering
The influence of low temperature stress on generation of activated oxygen species (AOS) content of ascorbate, glutathione, phenol compounds and activity of peroxidase specific to phenols (FPR) in green barley leaves were investigated. It was shown that in stress condition the content of AOS is accompained by increasing content of reduced forms of glutathione and ascorbate. the content of reduced ascorbate under influence of low temperature stress increased the most (4,4 time) compared to increasing amount of reduced glutatione (1,3 time). It was shown that near to zero (-2 C degree) temperature results in increase of content of the water-soluble phenols and decrease of FPR activity. In condition of more low subzero temperature (-5 C degree) the decreasing phenols content and increasing FPR activity was observed. The obtaining data indicate that the content of phenols depends inversely on the activity of FPR. The data obtained indicate the important role of reduced ascorbate in the defense of plant cells from low temperature stress
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