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Mol Plant Microbe Interact. 2000 May;13(5):568-71.

avrPto enhances growth and necrosis caused by Pseudomonas syringae pv.tomato in tomato lines lacking either Pto or Prf.

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NSF Center for Engineering Plants for Resistance Against Pathogens, University of California, Davis, 95616, USA.


AvrPto was introduced into three tomato genotypes with two biotic agents to study its role in compatible interactions. avrPto enhanced the capacity of the Pseudomonas syringae pv. tomato strain T1 to induce necrotic symptoms on tomato plants that lacked either Pto or Prf genes. The enhanced necrosis correlated with a small increase in bacterial growth. In planta expression of avrPto in isolation did not elicit necrosis in the absence of a functional Prf gene.

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