The use of exogenous 5-aminolevulinic acid for restoration of respiration and photosynthesis in plants of winter rape (Brassica napus) grown on sulfonylurea herbicide
Abstract
Exogenous 5-aminolevulinic acid (ALA) stimulated the respiration and photosynthesis in cotyledons of winter rape plants. Sulfonylurea herbicide Magnum did not reduce activity of respiration or even stimulated the process that was accompanied with similar effects on the activity of cytochrome ooxidase. Herbicide significantly inhibited photosynthetic activity, changed the structure of pigment-protein complexes of the reaction centers of Photosystem (PS) 2, light-harvesting complexes of PS1 and PS2 through decreasing content of their protein components. ALA in the presence of Magnum stimulated photosynthesis and respiration if herbicide inhibited these processes but decreased rate of them in case of their stimulation by herbicide. It was concluded that in the presence of herbicide ALA supported optimal homeostasis of respiration and photosynthetic as well as activity of cytochrome c-oxidase.
About the Authors
N. G. Averina
Институт биофизики и клеточной инженерии НАН Беларуси
Belarus
Belarus
R. A. Sherbakov
Институт биофизики и клеточной инженерии НАН Беларуси
Belarus
Belarus
I. V. Vershilovskaya
Институт биофизики и клеточной инженерии НАН Беларуси
Belarus
Belarus
I. N. Domanskaya
Институт биофизики и клеточной инженерии НАН Беларуси
Belarus
Belarus
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