Effects of abiotic stress on physiological plasticity and water use of Setaria viridis (L.)
| Autor: | Ahmad Arzani, Eduardo Blumwald, Bosheng Li, Maria del Mar Rubio Wilhelmi, Prasenjit Saha, Kevin M. Coe, Nir Sade |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Stomatal conductance Hot Temperature Genotype Setaria Plant Aquaporin Plant Science Plasticity Biology Photosynthesis 01 natural sciences 03 medical and health sciences Stress Physiological Botany Genetics Transpiration Abiotic stress Setaria viridis Water Plant Transpiration General Medicine biology.organism_classification Adaptation Physiological 030104 developmental biology Plant Stomata Adaptation Agronomy and Crop Science Heat-Shock Response Abscisic Acid Signal Transduction 010606 plant biology & botany |
| Zdroj: | Plant Science. 251:128-138 |
| ISSN: | 0168-9452 |
| Popis: | The emerging model Setaria viridis with its C4 photosynthesis and adaptation to hot and dry locations is a promising system to investigate water use and abiotic stress tolerance. We investigated the physiological plasticity of six S. viridis natural accessions that originated from different regions of the world under normal conditions and conditions of water-deficit stress and high temperatures. Accessions Zha-1, A10.1 and Ula-1 showed significantly higher leaf water potential (Ψleaf), photosynthesis (A), transpiration (E), and stomatal conductance (gs) rates compared to Ast-1, Aba-1 and Sha-1 when grown under stress conditions. Expression analysis of genes associated with C4 photosynthesis, aquaporins, ABA biosynthesis and signaling including genes involved in stress revealed an increased sensitivity of Ast-1, Aba-1 and Sha-1 to stresses. Correlation analysis of gene expression data with physiological and biochemical changes characterized A10.1 and Ast-1 as two extreme tolerant and sensitive accessions originated from United States and Azerbaijan under water-deficit and heat stress, respectively. Although preliminary, our study demonstrated the plasticity of S. viridis accessions under stress, and allows the identification of tolerant and sensitive accessions that could be use to study the mechanisms associated with stress tolerance and to characterize of the regulatory networks involved in C4 grasses. |
| Databáze: | OpenAIRE |
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