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Gene Involved in Transcriptional Activation of the hrp Regulatory Gene hrpG in Xanthomonas oryzae pv. oryzae

Seiji Tsuge,^1*, Takeshi Nakayama,^2,5, Shinsaku Terashima,^1, Hirokazu Ochiai,² Ayako Furutani,¹ Takashi Oku,³ Kazunori Tsuno,⁴ Yasuyuki Kubo,¹ and Hisatoshi Kaku²

Laboratory of Plant Pathology, Graduate School of Agriculture, Kyoto Prefectural University, Kyoto 606-8522,¹ National Institute of Agrobiological Sciences, Tsukuba 305-8602,² Laboratory of Molecular Plant Pathology, School of Bioresources, Hiroshima Prefectural University, Shobara 727-0023,³ Faculty of Agriculture, Miyazaki University, Miyazaki 889-2155,⁴ College of Agriculture, Ibaraki University, Ibaraki 300-0393, Japan⁵

Received 4 January 2006/ Accepted 9 March 2006

A novel regulatory gene, trh, which is involved in hrp gene expression, is identified in the plant pathogen Xanthomonas oryzae pv. oryzae. In the trh mutant, expression of HrpG, which is a key regulator for hrp gene expression, is reduced both under the in vitro hrp-inducing condition and in planta.

S.T., T.N., and S.T. contributed equally to this work.

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