FIG 8.

Schematic representation of a hypothetical model of the HS signaling pathway in GA biosynthesis in G. lucidum. HS treatment could induce NO accumulation, and NO production from NR is involved in alleviating HS-induced GA biosynthesis. There is cross talk between the NO and calcium signals in response to HS-induced GA biosynthesis. Ca²⁺ may have a more direct and significant effect than NO on the HS-induced GA increase. The solid arrows indicate data supported by our own experiments, and dotted arrows indicate potential reactions or data that have been experimentally supported in other systems.