Visn. Hark. nac. agrar. univ., Ser. Biol., 2017, Issue 3 (42), с. 46-51


L. Ye. Kozeko

M.G. Kholodny Institute of Botany
of National Academy of Science of Ukraine
(Kyiv, Ukraine)

The response to flooding in highly sensitive to low oxygen Arabidopsis thaliana and tolerant Sium sisaroideum was investigated. Dynamics of heat shock protein HSP70 (a component of the nonspecific stress reaction) and alcohol dehydrogenase (ADH, an enzyme of anaerobic metabolism) synthesis in leaves was characterized. Soil flooding was shown to cause rapid consecutive activation of HSP70 and ADH synthesis in both species. In A. thaliana, the level of the proteins reached a maximum on 6 h and then decreased. Further, flooding resulted in oppressing the plant development, damage and death. In S. sisaroideum, active synthesis of both proteins was maintained for 10 days of structural adaptation that supported normal growth. Activation of the nonspecific stress reaction and anaerobic metabolism in leaves after root flooding shows the systemic response of the plants to root hypoxia.

Key words: Arabidopsis thaliana, Sium sisaroideum, root hypoxia, HSP70, alcohol dehydrogenase, tolerance to flooding



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