Overexpression of SIPK in tobacco enhances ozone-induced ethylene formation and blocks ozone-induced SA accumulation
Ozone induces rapid activation of SIPK, a mitogen-activated protein kinase (MAPK) in tobacco. Through transgenic manipulation it has previously been shown that overexpression of SIPK leads to enhanced ozone-induced lesion formation with concomitant accumulation of ROS. In spite of this hypersensitiv...
| Veröffentlicht in: | Journal of experimental botany. - 1985. - 56(2005), 418 vom: 15. Aug., Seite 2195-201 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2005
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| Zugriff auf das übergeordnete Werk: | Journal of experimental botany |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Ethylenes Plant Proteins Ozone 66H7ZZK23N ethylene 91GW059KN7 Mitogen-Activated Protein Kinases EC 2.7.11.24 mehr... |
| Zusammenfassung: | Ozone induces rapid activation of SIPK, a mitogen-activated protein kinase (MAPK) in tobacco. Through transgenic manipulation it has previously been shown that overexpression of SIPK leads to enhanced ozone-induced lesion formation with concomitant accumulation of ROS. In spite of this hypersensitive phenotype, the effect of this altered SIPK expression on the levels of various hormones that regulate ozone-induced cell death has remained unexplored. The response of both salicylate and ethylene, the major phytohormones that modulate ozone-induced cell death, have now been analysed in SIPK-OX tobacco plants. Ozone treatment strongly induced ethylene formation in the sensitive SIPK-OX plants at ozone concentrations that failed to elicit stress ethylene release in WT plants. By contrast, SIPK-overexpressing plants displayed no ozone-induced SA accumulation, whereas WT plants accumulated SA upon ozone exposure. Epistatic analysis of SIPK-OX function suggests that the ozone-induced cell death observed in SIPK-OX plants is either independent, or upstream, of SA accumulation |
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| Beschreibung: | Date Completed 23.09.2005 Date Revised 13.12.2023 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1460-2431 |