Abstract
Gasotransmitters (GTs) are gaseous signal molecules composed of nitric oxide, hydrogen sulfide (H2S), and carbon monoxide (CO), with multiple roles in plant metabolism and a high capacity to induce plant tolerance against several stresses, including metalloid stress, heavy metals, salt, drought, and heat. This chapter focuses on recent insights into the benefits of GTs in higher plants. As small gas molecules, GTs can freely cross biological membranes independently of cognate membrane receptors, with advantages linked to specific cellular and molecular targets. This chapter demonstrates the GT modulation of genes and antioxidant enzymes, physiological responses, and positive repercussions for growth and development as a broad and important strategy to control the excessive concentrations of these toxic compounds generated during abiotic stress.
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