title: Conserved regions in the T-DNA of different Agrobacterium rhizogenes root-inducing plasmids.
abstract: The T-regions of the three so far identified types of Ri plasmids-corresponding to the synthesis of three different hairy root opines, agropine, mannopine and cucumopine-have been compared in detail by Southern blot cross hybridizations. Two distinct zones of very strong sequence homology, approximately 4 and 3 kilobases in length respectively, have been identified in all three T-regions. The highly conserved sequences, not present in Ti plasmid T-DNA, may encode essential rhizogenic functions common to all Agrobacterium rhizogenes T-DNAs.
authors.affiliation: Centro per lo Studio degli Acidi Nucleici, C.N.R., Roma, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Filetici
authors.forename: L
authors.initials: L
authors.lastname: Spanò
authors.forename: P
authors.initials: P
authors.lastname: Costantino