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| Content Provider | PubMed Central |
|---|---|
| Author | Oh, Youngjoo Baldwin, Ian T. Ivan, Gális |
| Copyright Year | 2012 |
| Abstract | The JASMONATE ZIM DOMAIN (JAZ) proteins function as negative regulators of jasmonic acid signaling in plants. We cloned 12 JAZ genes from native tobacco (Nicotiana attenuata), including nine novel JAZs in tobacco, and examined their expression in plants that had leaves elicited by wounding or simulated herbivory. Most JAZ genes showed strong expression in the elicited leaves, but NaJAZg was mainly expressed in roots. Another novel herbivory-elicited gene, NaJAZh, was analyzed in detail. RNA interference suppression of this gene in inverted-repeat (ir)JAZh plants deregulated a specific branch of jasmonic acid-dependent direct and indirect defenses: irJAZh plants showed greater trypsin protease inhibitor activity, 17-hydroxygeranyllinalool diterpene glycosides accumulation, and emission of volatile organic compounds from leaves. Silencing of NaJAZh also revealed a novel cross talk in JAZ-regulated secondary metabolism, as irJAZh plants had significantly reduced nicotine levels. In addition, irJAZh spontaneously developed leaf necrosis during the transition to flowering. Because the lesions closely correlated with the elevated expression of programmed cell death genes and the accumulations of salicylic acid and hydrogen peroxide in the leaves, we propose a novel role of the NaJAZh protein as a repressor of necrosis and/or programmed cell death during plant development. |
| Related Links | http://dx.doi.org/10.1104/pp.112.193771 |
| Ending Page | 788 |
| Page Count | 20 |
| Starting Page | 769 |
| File Format | |
| ISSN | 00320889 |
| e-ISSN | 15322548 |
| Journal | Plant Physiology |
| Issue Number | 2 |
| Volume Number | 159 |
| Language | English |
| Publisher | American Society of Plant Biologists |
| Publisher Date | 2012-06-01 |
| Access Restriction | Open |
| Rights Holder | American Society of Plant Biologists |
| Subject Keyword | Plant Science Genetics Physiology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Physiology Plant Science |
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