Does integrative effects of glyphosate, gibberellin and hydrogen peroxide ameliorate the deleterious effects of the herbicide on sorghum seed through its germination?

We investigated the interconnected roles of reactive oxygen species (ROS) generated upon seed exposure to glyphosate and/or gibberellic acid (GA), and the possible interaction between the herbicide and the plant hormone during germination of sorghum seeds. GA decreased antioxidant enzyme activity in embryos, and the over accumulation of hydrogen peroxide (HO) in 1000 mM GA-treated seeds resulted in the lowest germinability among treatments. The deleterious effects of glyphosate on germination rate, in contrast, were not related to HO accumulation, but to its interference with the mitochondrial electron transport chain.

Integrative effects of zinc and temperature on germination in Dimorphandra wilsonii rizz.: Implications of climate changes.

The integrative effects of zinc (Zn; 0 mg L , 75 mg L , 150 mg L , and 200 mg L ) and temperature (25 °C, 30 °C, and 35 °C) on seed germination of the threatened Brazilian species Dimorphandra wilsonii were evaluated. Zinc effects on seed germination were only observed at 30 °C and 35 °C. By stimulating respiration rates, rising temperatures accentuate hydrogen peroxide (H O ) formation in germinating seeds in the presence of Zn.