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Information × Registration Number 0217U006639, 0117U001981 , R & D reports Title Stress-protective plant systems: inducing by signal mediators and physiologically active compounds popup.stage_title Head Yastreb Tetyana Olegivna, Registration Date 19-12-2017 Organization V.V. Dokuchaev Kharkiv National Agrarian University popup.description2 The influence of hydrogen peroxide treatment on the salt tolerance of Arabidopsis thaliana plants of wild type (Col-0) and transformed with bacterial salicylate hydroxylase (NahG) genome has been studied. A conclusion was made about the presence in Arabidopsis some pathways of transduction of hydrogen peroxide signal, which function without participation of salicylic acid, and about more efficient functioning of the antioxidant system in the salicylate-deficient Arabidopsis plants. The features of reaction to salt stress and exogenous methyl jasmonate of the Arabidopsis mutants, defective in jasmonate signaling, have been studied. Mutants (jin1, coi1, jar1) differed from wild-type plants with lower salt tolerance and less balanced work of antioxidant system under salt stress conditions. In response to treatment with methyl jasmonate, the increase in activity of antioxidant enzymes at salt stress was noted only in wild-type plants. The effect of abscisic acid (ABA) and methyl jacmonate on the state of stomata of wild-type (Col-0) and mutant (jin1, coi1, jar1) Arabidopsis plants was investigated. In wild-type plants both phytohormones caused a significant reduction in the size of stomatal aperture. Plants jin1 practically did not show any reaction to action of these hormones. In mutants jar1 and coi1 under the influence of ABA, but not methyl jasmonate, the stomatal aperture decreased in almost the same way as in wild-type plants. The effect of a hydrogen sulfide donor NaHS on resistance of etiolated wheat seedlings to osmotic stress induced by 12% PEG 6000 was studied. Treatment with NaHS reduced the effect of inhibiting the roots and shoots growth and increased the water content in seedlings, the activity of antioxidant enzymes, the content of proline and anthocyanins. It is concluded that induced by a H2S donor resistance of wheat seedlings to osmotic stress is associated with the activation of antioxidant and osmoprotective systems. The obtained results can be used in the development of practical methods of induction of plant resistance. Product Description popup.authors Карпець Юрій Вікторович Колупаєв Юрій Євгенович Лугова Ганна Арнольдівна Чернов Кирило Костянтинович Швиденко Микола Володимирович Шкляревський Максим Анатолійович popup.nrat_date 2020-04-02 Close