Fig. (2) Silencing of PDS following injection with the artificial satellite IR-PDS-RI. A. Photographs of chlorophyll bleaching following PDS silencing. Initially, major veins were bleached (AI), followed by its spread into neighboring tissue (AII) and finally, to all parts of the plant (AIII). B. Appearance of siRNAs of PDS sequences following treatment with IR-PDS-RI, Lane 1: siRNA analysis of an untreated plant. Lane 2: siRNA analysis of a plant treated with IR-PDS-RI. Lane 3: A 25-base-long size marker. Lane 4: Negative control (sample buffer only).