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Abstract. Tolerance against oxidative stress generated by high light intensities or the catalase inhibitor aminotriazole (AT) was induced in intact tobacco plants by spraying them with hydrogen peroxide (H2O2). Stress tolerance was concomitant with an enhanced antioxidant status as reflected by higher activity and/or protein levels of catalase, ascorbate peroxidase, guaiacol peroxidases, and glutathione...
The photodynamic damage of the sensitive plants wheat and mustard, treated with chlorophyll (Chl) precursors 5-aminolevulinic acid (ALA) and glutamic acid (Glu) and with 1,10-phenanthroline (Phen), was caused by tetrapyrroles, which accumulated after 17 h in the dark period, followed by 12 h of irradiation with “white light”. The effect of accumulated Chl in mustard plants was accompanied by changes...
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