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Journal of General Plant Pathology (2001) 67, 148-151

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Rui Tanaka, Fumiko Taguchi, Yuki Ichinose, Kazuhiro Toyoda, Tomonori Shiraishi and Tetsuji Yamada (2001)
Effect of harpin from four pathovars of Pseudomonas syringae on pea defense responses
Journal of General Plant Pathology 67 (2), 148-151
Abstract: To investigate the role of the proteinaceous elicitor, harpin, on host and nonhost plants, we isolated the harpin-coding gene, hrpZ, from Pseudomonas syringae pvs. pisi, glycinea, tabaci and tomato. Effects of the recombinant harpin proteins on pea plants were analyzed and compared with the effects of the corresponding bacterial treatment. After inoculation of pea with pea pathogen P. syringae pv. pisi, the bacterial population increased and the accumulation of PAL-mRNA and pisatin was inhibited. The nonpathogenic pathovars, glycinea, tabaci and tomato induced both defense responses in pea. However, none of the harpins induced the hypersensitive reaction or accumulation of PAL-mRNA and pisatin in pea. Harpins from P. syringae pvs. glycinea, tomato and pisi did induce these defense responses in tobacco, however, suggesting that externally applied harpins either are not recognized or are nonfunctional in pea plants.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Kazuhiro Toyoda, Tomonori Shiraishi, Yuki Ichinose

Research topic(s) for pests/diseases/weeds:
molecular biology - genes
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Pseudomonas syringae pv. tomato
Pseudomonas syringae pv. glycinea
Pseudomonas syringae pv. pisi Pea (Pisum sativum)
Pseudomonas syringae pv. tabaci
Pseudomonas syringae