“…Over the centuries, H 2 S has been exclusively known for its toxicity and environmental hazards (Wang, 2012), but today it emerges as an important signaling molecule (Hancock et al, 2011;Li et al, 2016;Zhang, 2016), participating in the seed germination, plant growth, and development, as well as in the acquisition of stress tolerance, including a crossadaptation in plants (Li et al, 2016). The protective role M. Kristić et al: THE INFLUENCE OF HYDROGEN SULFIDE ON WHEATGRASS (Triticum aestivum L.)... of hydrogen sulfide in the osmotic (Zhang et al, 2010), drought (Kolupaev et al 2019a;Batista et al, 2020), heat (Min et al, 2016), and heavy metal stress (Rizwan et al, 2019;Zanganeh et al, 2019;Kaya et al, 2020) has been confirmed. So far, only a few studies have been conducted to examine the effects of hydrogen sulfide in the plants exposed to an excessive photon flux (Joshi et al, 2020;Liu et al, 2019).…”