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.
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Filetici, P., Spanò, L. & Costantino, P. Conserved regions in the T-DNA of different Agrobacterium rhizogenes root-inducing plasmids. Plant Mol Biol 9, 19–26 (1987). https://doi.org/10.1007/BF00017983
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DOI: https://doi.org/10.1007/BF00017983