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Plant and Cell Physiology, 1999, Vol. 40, No. 2 252-256
© 1999

Short Communication

Synergistic Function of rolB, rolC, ORF13 and ORF14 of TL-DNA of Agrobacterium rhizogenes in Hairy Root Induction in Nicotiana tabacum

Seishiro Aoki1, and Kunihiko Syono2

Department of Life Science, Graduate School of Arts and Sciences, University of Tokyo 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902 Japan

1 To whom correspondence should be addressed

Comparison of the frequency of rooting in the tobacco leaf segments inoculated with Agrobacterium tumefaciens harboring various combinations of rolB, rolC, ORF13 and ORF14 of TL-DNA of Ri plasmid (pRiHRI) revealed that the genes differ in their function to stimulate adventitious root induction. A single gene rolB induced roots, while rolC, ORF13 and ORF14 independently promoted the root induction by the rolB gene. The effects of these genes on the rolB-mediated rooting were in the order of ORF13>rolCless double equalsORF14.

Present address: Laboratory of Phylogenetic Botany, Department of Biology, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522 Japan.

2 Present address: Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681 Japan.

(Received August 24, 1998; Accepted December 6, 1998)
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