Red-emitting fluorescent probe with excellent water solubility for the in situ monitoring of endogenous HS in wheat under salt and Al stress.

Hydrogen sulfide (HS) is a pivotal signaling molecule in plants and appropriate levels are essential for normal growth. As such the real-time detection of HS in plants is required since it enables timely targeted interventions. However, most fluorescent probes for detecting HS reported to date exhibit fluorescence quenching in aqueous solution thereby significantly constraining their potential for in vivo applications.