Figure 2.

GC chromatogram of steroid profiling of Cuscuta haustoria-forming part. (a) Cuscuta seedlings before parasitization; (b) haustoria induced in vitro; (c) parasitizing Momordica at stage 1; (d) parasitizing Momordica at stage 2; (e) parasitizing Momordica at stage 3. Campesterol, stigmasterol, sitosterol, β-Amyrin and peak annotated as cycloartenol. In particular, β-Amyrin and the peak annotated as cycloartenol increased in intensity after interaction with Momordica. Values at x and y axis indicate retention time and relative intensity, respectively.