Contents

18 October 2011
Vol 4, Issue 195

About The Cover

Cover image expansion

Online Cover This week features a Research Article that describes how the plant pathogen Agrobacterium tumefaciens prevents degradation of its key virulence factor in infected host cells. The image shows a weeping fig with crown galls or tumors caused by Agrobacterium infection. [Image: Florida Division of Plant Industry Archive/Florida Department of Agriculture and Consumer Services]