Initiation of Plant Disease Resistance by Physical Interaction of AvrPto and Pto Kinase

American Association for the Advancement of Science (AAAS) - Tập 274 Số 5295 - Trang 2060-2063 - 1996
Xiaoyan Tang1, Reid D. Frederick1, Jian‐Min Zhou1, Dennis Halterman1, Yulin Jia1, Gregory B. Martin1
1Department of Agronomy, Purdue University, West Lafayette, IN 47907-1150

Tóm tắt

Resistance to bacterial speck disease in tomato occurs when the Pto kinase in the plant responds to expression of the avirulence gene avrPto in the Pseudomonas pathogen. Transient expression of an avrPto transgene in plant cells containing Pto elicited a defense response. In the yeast two-hybrid system, the Pto kinase physically interacted with AvrPto. Alterations of AvrPto or Pto that disrupted the interaction in yeast also abolished disease resistance in plants. The physical interaction of AvrPto and Pto provides an explanation of gene-for-gene specificity in bacterial speck disease resistance.

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