VIEW ARTICLE

Physiology and Biochemistry

Host Responses in Peas to Challenge by Wall Components of Pseudomonas syringae pv. pisi Races 1, 2, and 3. Catherine H. Daniels, Department of Plant Pathology, Washington State University, Pullman 99164-6430; Yvonne S. Cody, and Lee A. Hadwiger. Department of Plant Pathology, Washington State University, Pullman 99164-6430. Phytopathology 78:1451-1453. Accepted for publication 23 June 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/Phyto-78-1451.

The induction potential of cell wall fractions of Pseudomonas syringae pv. pisi races 1, 2 and 3 were studied by using levels of pisatin and specific mRNA transcripts as a measure of host response. Neither the lipopolysaccharide, lipoprotein-peptidoglycan preparations, nor the entire outer membrane preparation of any of the races induced pisatin accumulation. The complete bacterial envelope, however, induced moderate accumulations of pisatin and enhanced accumulation of disease resistance response RNAs nonspecifically in almost all combinations of bacterial envelopes and plant cultivars.