PAP/SAL1 retrograde signaling pathway modulates iron deficiency response in alkaline soils
| Autor: | Manuel Balparda, Maria A. Pagani, Alejandro M. Armas, Diego F. Gomez-Casati |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Iron Mutant Phosphoadenosine Phosphosulfate Arabidopsis Plant Science Biology Real-Time Polymerase Chain Reaction 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Soil Biosynthesis Genetics Iron deficiency (plant disorder) Carotenoid chemistry.chemical_classification Phenylpropanoid Arabidopsis Proteins food and beverages General Medicine Iron Deficiencies Hydrogen-Ion Concentration biology.organism_classification Phosphoric Monoester Hydrolases 030104 developmental biology chemistry Biochemistry Chlorophyll Retrograde signaling Agronomy and Crop Science 010606 plant biology & botany Signal Transduction |
| Zdroj: | Plant science : an international journal of experimental plant biology. 304 |
| ISSN: | 1873-2259 |
| Popis: | Iron (Fe) is an essential micronutrient for plants and is present abundantly in the Earth's crust. However, Fe bioavailability in alkaline soils is low due to the decreased solubility of the ferric ions. Previously, we have demonstrated the relationship between the PAP/SAL1 retrograde signaling pathway, the activity of Strategy I Fe uptake genes (FIT, FRO2, IRT1), and ethylene signaling. In this work, we have characterized mutant lines that are deficient in this retrograde signaling pathway and their ability to grow in alkaline soils. This adverse growth condition caused less impact on mutant plants, which showed less reduced rosette area, and higher carotenoid, chlorophyll and Fe content than wild-type plants. Several genes involved in the biosynthesis and excretion of secondary metabolites derived from the phenylpropanoid pathway, which improve Fe uptake, were elevated in mutant plants. Finally, we observed an increase in excreted fluorescent phenolic compounds in mutant lines compared to wild-type plants. In this way, PAP/SAL1 mutants showed alterations in the biosynthesis of metabolites that mobilize Fe, which ultimately improved these plants ability to grow in alkaline soils. Results agree with the existence of a link between the PAP/SAL1 retrograde signaling pathway and the regulation of Fe deficiency responses in Arabidopsis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect