Alleviation of aluminum toxicity by hydrogen sulfide is related to elevated ATPase, and suppressed aluminum uptake and oxidative stress in barley

► External H2S significantly alleviates Al toxicity in barley. ► External H2S reduces Al uptake, increases uptake of P, Ca, Mg and Fe. ► H2S alleviated Al-induced oxidative damage, up-regulated CAT and POD and suppressed ROS production. ► H2S elevated Al-induced depressed activities of Na+K+-ATPase and H+-ATPase. ► H2S improved photosynthesis performance of Al-stressed plants.