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Rapid linkage of indole carboxylic acid to the plant cell wall identified as a component of basal defence in Arabidopsis against hrp mutant bacteria
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Forcat, Silvia, Bennett, Mark, Grant, Murray and Mansfield, John W. (2010) Rapid linkage of indole carboxylic acid to the plant cell wall identified as a component of basal defence in Arabidopsis against hrp mutant bacteria. Phytochemistry, 71 (8-9). pp. 870-876. doi:10.1016/j.phytochem.2010.03.010 ISSN 0031-9422.
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Official URL: http://dx.doi.org/10.1016/j.phytochem.2010.03.010
Abstract
Changes occurring to plant cell walls were examined following inoculation of Arabidopsis leaves with pathogenic and non-pathogenic (hrpA mutant) strains of Pseudomonas syringae pv. tomato. We have targeted low molecular weight, cross-linked phenolic and indolic compounds that were released from wall preparations by alkaline hydrolysis at 70 °C and in a microwave bomb. Significantly higher concentrations of syringaldehyde, p hydroxybenzaldehyde and indole carboxylic acid were recovered from cell walls isolated from leaves 24 h after challenge with the hrpA mutant compared with wild-type DC3000. Time course experiments showed that the accumulation of indole carboxylic acid and the other group of differentiating metabolites had occurred within 12 h of inoculation. The callose synthase deficient mutant pmr4-1 was more resistant than wild-type Columbia plants to P. syringae pv. tomato. Restricted bacterial multiplication was associated with increased accumulation of indole carboxylic acid on the plant cell wall. In the absence of callose deposition in the pmr 4-1 mutant, indolic derivatives may serve as a structural scaffold for wall modifications following bacterial challenge.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Journal or Publication Title: | Phytochemistry | ||||
| Publisher: | Pergamon Press | ||||
| ISSN: | 0031-9422 | ||||
| Official Date: | 2010 | ||||
| Dates: |
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| Volume: | 71 | ||||
| Number: | 8-9 | ||||
| Page Range: | pp. 870-876 | ||||
| DOI: | 10.1016/j.phytochem.2010.03.010 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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