ZmMKK3, a novel maize group B mitogen-activated protein kinase kinase gene, mediates osmotic stress and ABA signal responses
Copyright © 2012 Elsevier GmbH. All rights reserved.
| Veröffentlicht in: | Journal of plant physiology. - 1979. - 169(2012), 15 vom: 15. Okt., Seite 1501-10 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2012
|
| Zugriff auf das übergeordnete Werk: | Journal of plant physiology |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Polyethylene Glycols 3WJQ0SDW1A Abscisic Acid 72S9A8J5GW Hydrogen Peroxide BBX060AN9V Mitogen-Activated Protein Kinases EC 2.7.11.24 |
| Zusammenfassung: | Copyright © 2012 Elsevier GmbH. All rights reserved. Mitogen-activated protein kinase (MAPK) cascades are important intracellular signaling modules and function as a convergent point for crosstalk during abiotic stress signaling. In this article, we isolated a novel group B MAPKK gene, ZmMKK3, from Zea mays. ZmMKK3 protein might be localized in both the cytoplasm and the nucleus. RNA blot analysis indicated that the ZmMKK3 transcription was up-regulated by abscisic acid (ABA), hydrogen peroxide (H(2)O(2)) and PEG, and that H(2)O(2) mediated PEG-induced expression of ZmMKK3. Constitutive expression of ZmMKK3 in Nicotiana tabacum reduced H(2)O(2) accumulation under osmotic stress by affecting antioxidant defense systems and alleviated reactive oxygen species-mediated injury under oxidative stress. Transgenic tobacco exhibited attenuated ABA sensitivity by means of an increased germination rate and main root growth. Taken together, these results indicate that ZmMKK3 is a positive regulator of osmotic tolerance and ABA signaling in plants |
|---|---|
| Beschreibung: | Date Completed 11.04.2013 Date Revised 13.12.2023 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1618-1328 |
| DOI: | 10.1016/j.jplph.2012.06.008 |