Stomatal and Photosynthetic Traits Are Associated with Investigating Sodium Chloride Tolerance of Brassica napus L. Cultivars
Top Cited Papers
Open Access
- 2 January 2020
- Vol. 9 (1), 62
- https://doi.org/10.3390/plants9010062
Abstract
The negative effects of salt stress vary among different rapeseed cultivars. In this study, we investigated the sodium chloride tolerance among 10 rapeseed cultivars based on membership function values (MFV) and Euclidean cluster analyses by exposing seedlings to 0, 100, or 200 mM NaCl. The NaCl toxicity significantly reduced growth, biomass, endogenous K+ levels, relative water content and increased electrolyte leakage, soluble sugar levels, proline levels, and antioxidant enzyme activities. SPAD values were highly variable among rapeseed cultivars. We identified three divergent (tolerant, moderately tolerant, and sensitive) groups. We found that Hua6919 and Yunyoushuang2 were the most salt-tolerant cultivars and that Zhongshuang11 and Yangyou9 were the most salt-sensitive cultivars. The rapeseed cultivars were further subjected to photosynthetic gas exchange and anatomical trait analyses. Among the photosynthetic gas exchange and anatomical traits, the stomatal aperture was the most highly correlated with salinity tolerance in rapeseed cultivars and thus, is important for future studies that aim to improve salinity tolerance in rapeseed. Thus, we identified and characterized two salt-tolerant cultivars that will be useful for breeding programs that aim to develop salt-tolerant rapeseed.Keywords
Funding Information
- National Key Research and Development Program of China (2018YFD1000900)
- Fundamental Research Funds for the Central Universities (2662017JC005)
This publication has 69 references indexed in Scilit:
- Physiological and molecular aspects of salt stress in plantsCytology and Genetics, 2012
- A Study of Proline Metabolism in Canola (Brassica napus L.) Seedlings under Salt StressMolecules, 2012
- Wheat grain yield on saline soils is improved by an ancestral Na+ transporter geneNature Biotechnology, 2012
- Redox homeostasis, antioxidant defense, and methylglyoxal detoxification as markers for salt tolerance in Pokkali riceProtoplasma, 2010
- Enhancing chilling stress tolerance of pepper seedlings by exogenous application of 5-aminolevulinic acidEnvironmental and Experimental Botany, 2010
- Contrasting Responses of Photosynthesis to Salt Stress in the Glycophyte Arabidopsis and the Halophyte Thellungiella: Role of the Plastid Terminal Oxidase as an Alternative Electron SinkPlant Physiology, 2008
- Mechanisms of Salinity ToleranceAnnual Review of Plant Biology, 2008
- Towards salinity tolerance in Brassica: an overviewPhysiology and Molecular Biology of Plants, 2008
- Effect of Salinity on the Composition, Number and Size of Epidermal Cells along the Mature Blade of Wheat LeavesJournal of Integrative Plant Biology, 2007
- Salt-induced oxidative stress in chloroplasts of pea plantsPlant Science, 1995