Abstract |
Arabidopsis leaves treated with simulated acid rain (SiAR) showed phenotypes similar to necrotic lesions caused by biotic stresses like Pseudomonad infiltration. Exposure of Arabidopsis to SiAR resulted in the up-regulation of genes known to be induced by the salicylic acid (SA)-mediated pathogen resistance response. The expression of enhanced disease susceptibility (EDS), nonexpressor of PR (NPR) and pathogen-related 1 (PR1), all of which are involved in the salicylic acid signaling pathway, were increased after SiAR exposure. However, vegetative storage protein (VSP), a member of the jasmonic acid pathway did not show a significant change in transcript level. SiAR treatment of transgenic plants expressing salicylate hydroxylase (Nah-G), which prevents the accumulation of salicylic acid, underwent more extensive necrosis than wild-type plants, indicating that the signaling pathway activated by SiAR may overlap with the SA-dependent, systemic acquired resistance pathway. Both Col-0 and Nah-G plants showed sensitivity to SiAR and sulfuric SiAR (S-SiAR) by developing necrotic lesions. Neither Col-0 plants nor Nah-G plants showed sensitivity to nitric SiAR (N-SiAR). These results suggest that SiAR activates at least the salicylic acid pathway and activation of this pathway is sensitive to sulfuric acid.
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Authors | Youngmi Lee, Jongbum Park, Kyunghoan Im, Kiyoon Kim, Jungwoo Lee, Kyungyeoll Lee, Jung-An Park, Taek-Kyun Lee, Dae-Sup Park, Joo-Sung Yang, Donggiun Kim, Sukchan Lee |
Journal | Plant physiology and biochemistry : PPB
(Plant Physiol Biochem)
Vol. 44
Issue 1
Pg. 38-42
(Jan 2006)
ISSN: 0981-9428 [Print] France |
PMID | 16549362
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Acid Rain
- Arabidopsis Proteins
- Cyclopentanes
- Oxylipins
- jasmonic acid
- Mixed Function Oxygenases
- salicylate 1-monooxygenase
- Salicylic Acid
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Topics |
- Acid Rain
(toxicity)
- Arabidopsis
(genetics, metabolism, physiology)
- Arabidopsis Proteins
(metabolism)
- Cyclopentanes
(metabolism)
- Mixed Function Oxygenases
(genetics, metabolism)
- Oxylipins
- Plant Diseases
(chemically induced, genetics)
- Plant Leaves
(metabolism, physiology)
- Plants, Genetically Modified
- Salicylic Acid
(metabolism)
- Signal Transduction
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