Cover photograph (Copyright © 2002, American Society for Microbiology. All Rights Reserved.): Transport of viruses in plants involves cell-to-cell movement and spread through the vascular system. These processes are mediated by virus-encoded movement proteins (MPs) and long-distance transport factors (LTFs), respectively. In the Beet yellows virus (BYV), an Hsp70-related MP and a 20-kDa LTF are able to interact and are both incorporated into virions. Thus, unusually complex BYV virions function in protection and transport of virus genomes. The photograph illustrates the interaction between BYV MP and LTF after coexpression in plant cells. The green fluorescent bodies seen at the cell periphery are formed due to colocalization of the MP and LTF green fluorescent protein fusion. (See related article in November 2002: vol. 76, no. 21, p. 11003.)