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. 2024 Aug 9;11(10):uhae229. doi: 10.1093/hr/uhae229

Figure 2.

Figure 2

Model of the ethylene-mediated fruit set. In flowering plant, ethylene promotes selfing (self-compatible) while inhibiting outcrossing (self-incompatible). The pollination process stimulates a transient ethylene burst, which plays a positive role in the maturation of the reproductive organs and pollen tube growth for the following fertilization. Successful fertilization induces the auxin pathway that can downregulate ethylene biosynthesis, leading to derepressed GA pathway and thereby initiates fruit formation. The upper right corner photos show the extruded stigma in tomato slein2 LOF mutant. The regular arrow indicates positive regulation, and the ‘T’ represents negative regulation.