Fig. 2
From: An efficient grafting method for phytoplasma transmission in Catharanthus roseus
Floral and leaf symptoms of periwinkle leaf yellowing (PLY) phytoplasma-infected periwinkle plants
(A) Flowers of healthy periwinkle; (B to D) flowers of PLY phytoplasma-infected periwinkle plants; (E) leaves of healthy periwinkle; (F and G) leaves or shoots of PLY phytoplasma-infected periwinkle plants. Flowers that exhibit discoloration or partial yellowing of leaves were defined as the S1 symptom stage (B and F). Flowers showing partial virescence are at the S2 stage (C), while flowers that have completed virescence or shoot proliferation are at the S3 stage (D and G)