Uncovering salt tolerance mechanisms in pepper plants: a physiological and transcriptomic approach
| Autor: | Salvador López-Galarza, Ramón Serrano, Ángeles Calatayud, Eduardo Bueso, Lidia López-Serrano |
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| Rok vydání: | 2021 |
| Předmět: |
F61 Plant physiology - Nutrition
Ion homeostasis Salt stress Plant Science Growth Tolerant accessions Biology Photosynthesis Transcriptome chemistry.chemical_compound Abscisic acid lcsh:Botany Pepper Botany PRODUCCION VEGETAL BIOQUIMICA Y BIOLOGIA MOLECULAR Osmotic pressure Proline F40 Plant ecology food and beverages Salt Tolerance F60 Plant physiology and biochemistry lcsh:QK1-989 Salinity chemistry Capsicum Research Article |
| Zdroj: | electronico ReDivia. Repositorio Digital del Instituto Valenciano de Investigaciones Agrarias instname BMC Plant Biology, Vol 21, Iss 1, Pp 1-17 (2021) ReDivia: Repositorio Digital del Instituto Valenciano de Investigaciones Agrarias Instituto Valenciano de Investigaciones Agrarias (IVIA) BMC Plant Biology Digital.CSIC. Repositorio Institucional del CSIC RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| DOI: | 10.1186/s12870-021-02938-2 |
| Popis: | [EN] Background Pepper is one of the most cultivated crops worldwide, but is sensitive to salinity. This sensitivity is dependent on varieties and our knowledge about how they can face such stress is limited, mainly according to a molecular point of view. This is the main reason why we decided to develop this transcriptomic analysis. Tolerant and sensitive accessions, respectively called A25 and A6, were grown for 14 days under control conditions and irrigated with 70 mM of NaCl. Biomass, different physiological parameters and differentially expressed genes were analysed to give response to differential salinity mechanisms between both accessions. Results The genetic changes found between the accessions under both control and stress conditions could explain the physiological behaviour in A25 by the decrease of osmotic potential that could be due mainly to an increase in potassium and proline accumulation, improved growth (e.g. expansins), more efficient starch accumulation (e.g. BAM1), ion homeostasis (e.g. CBL9, HAI3, BASS1), photosynthetic protection (e.g. FIB1A, TIL, JAR1) and antioxidant activity (e.g. PSDS3, SnRK2.10). In addition, misregulation of ABA signalling (e.g. HAB1, ERD4, HAI3) and other stress signalling genes (e.g. JAR1) would appear crucial to explain the different sensitivity to NaCl in both accessions. Conclusions After analysing the physiological behaviour and transcriptomic results, we have concluded that A25 accession utilizes different strategies to cope better salt stress, being ABA-signalling a pivotal point of regulation. However, other strategies, such as the decrease in osmotic potential to preserve water status in leaves seem to be important to explain the defence response to salinity in pepper A25 plants. This work was financed by the INIA (Spain) and the Ministerio de Ciencia, Innovacion y Universidades (RTA2017-00030-C02-00) and the European Regional Development Fund (ERDF). Lidia Lopez-Serrano is a beneficiary of a doctoral fellowship (FPI-INIA). |
| Databáze: | OpenAIRE |
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