Transgenerational Seed Exposure to Elevated CO Involves Stress Memory Regulation at Metabolic Levels to Confer Drought Resistance in Wheat.

Drought is the worst environmental stress constraint that inflicts heavy losses to global food production, such as wheat. The metabolic responses of seeds produced overtransgenerational exposure to [CO] to recover drought's effects on wheat are still unexplored. Seeds were produced constantly for four generations (F1 to F4) under ambient CO ([CO], 400 μmol L) and elevated CO ([CO], 800 μmol L) concentrations, and then further regrown under natural CO conditions to investigate their effects on the stress memory metabolic processes liable for increasing drought resistance in the next generation (F5).