Release of SOS2 kinase from sequestration with GIGANTEA determines salt tolerance in Arabidopsis
| Autor: | Joon-Yung Cha, Su Jung Park, Hyeong Cheol Park, Woe-Yeon Kim, Gilok Shin, Hans J. Bohnert, Li Ning, Sang Yeol Lee, Javier Pérez-Hormaeche, Mi Ri Kim, Zahir Ali, Dae-Jin Yun, Ray A. Bressan, Hee Jin Park, José M. Pardo, Zhang Qiang, Francisco J. Quintero |
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| Rok vydání: | 2013 |
| Předmět: |
Sodium-Hydrogen Exchangers
Time Factors Mutant Circadian clock Arabidopsis Regulator General Physics and Astronomy Flowers Protein Serine-Threonine Kinases Sodium Chloride Models Biological General Biochemistry Genetics and Molecular Biology Stress Physiological parasitic diseases Botany Phosphorylation Protein kinase A Multidisciplinary biology Arabidopsis Proteins Protein Stability Kinase fungi Gigantea food and beverages Salt Tolerance General Chemistry biology.organism_classification Cell biology Proteolysis SOS1 population characteristics human activities Protein Binding Signal Transduction |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname NATURE COMMUNICATIONS(4) |
| Popis: | Kim, Woe-Yeon et al. Environmental challenges to plants typically entail retardation of vegetative growth and delay or cessation of flowering. Here we report a link between the flowering time regulator, GIGANTEA (GI), and adaptation to salt stress that is mechanistically based on GI degradation under saline conditions, thus retarding flowering. GI, a switch in photoperiodicity and circadian clock control, and the SNF1-related protein kinase SOS2 functionally interact. In the absence of stress, the GI:SOS2 complex prevents SOS2- based activation of SOS1, the major plant Na+/H+-antiporter mediating adaptation to salinity. GI over-expressing, rapidly flowering, plants show enhanced salt sensitivity, whereas gi mutants exhibit enhanced salt tolerance and delayed flowering. Salt-induced degradation of GI confers salt tolerance by the release of the SOS2 kinase. The GISOS2 interaction introduces a higher order regulatory circuit that can explain in molecular terms, the long observed connection between floral transition and adaptive environmental stress tolerance in Arabidopsis. This research was supported by the Next-Generation BioGreen 21 Program (Systems and Synthetic Agrobiotech Center, no. PJ008025), a Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ007850), and the Ministry of Education, Science and Technology for the World Class University (WCU) program (R32-10148) from the Rural Development Administration, Republic of Korea, and by grant BIO2009-08641 financed by the Spanish Ministry of Science and Innovation and the FEDER program. |
| Databáze: | OpenAIRE |
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