Early Growth Stage Characterization and the Biochemical Responses for Salinity Stress in Tomato
| Autor: | Mark Tester, Sarowar Alam, Gabriele Fiene, Magdi A. A. Mousa |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Plant Science 01 natural sciences Irrigation water Salinity stress Article 03 medical and health sciences Crop production Genotype indices Proline Ecology Evolution Behavior and Systematics salt stress PCA Ecology biology Botany Percentage reduction biology.organism_classification Salinity Horticulture 030104 developmental biology antioxidants Seedling QK1-989 seedling traits 010606 plant biology & botany cluster analysis |
| Zdroj: | Plants Volume 10 Issue 4 Plants, Vol 10, Iss 712, p 712 (2021) |
| ISSN: | 2223-7747 |
| Popis: | Salinity is one of the most significant environmental stresses for sustainable crop production in major arable lands of the globe. Thus, we conducted experiments with 27 tomato genotypes to screen for salinity tolerance at seedling stage, which were treated with non-salinized (S1) control (18.2 mM NaCl) and salinized (S2) (200 mM NaCl) irrigation water. In all genotypes, the elevated salinity treatment contributed to a major depression in morphological and physiological characteristics however, a smaller decrease was found in certain tolerant genotypes. Principal component analyses (PCA) and clustering with percentage reduction in growth parameters and different salt tolerance indices classified the tomato accessions into five key clusters. In particular, the tolerant genotypes were assembled into one cluster. The growth and tolerance indices PCA also showed the order of salt-tolerance of the studied genotypes, where Saniora was the most tolerant genotype and P.Guyu was the most susceptible genotype. To investigate the possible biochemical basis for salt stress tolerance, we further characterized six tomato genotypes with varying levels of salinity tolerance. A higher increase in proline content, and antioxidants activities were observed for the salt-tolerant genotypes in comparison to the susceptible genotypes. Salt-tolerant genotypes identified in this work herald a promising source in the tomato improvement program or for grafting as scions with improved salinity tolerance in tomato. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|