title: Biogenesis and Biological Activity of Secondary siRNAs in Plants.
abstract: Two important hallmarks of RNA silencing in plants are (1) its ability to self-amplify by using a mechanism called transitivity and (2) its ability to spread locally and systemically through the entire plant. Crucial advances have been made in recent years in understanding the molecular mechanisms of these phenomena. We review here these recent findings, and we highlight the recently identified endogenous small RNAs that use these advantageous properties to act either as patterning signals in important developmental programs or as a part of regulatory cascades.
authors.affiliation: Institute of Botany, University of Basel, Zürich-Basel Plant Science Center, Part of the Swiss Plant Science Web, CH-4056 Basel, Switzerland.
authors.forename: Franck
authors.initials: F
authors.lastname: Vazquez
authors.forename: Thomas
authors.initials: T
authors.lastname: Hohn