Effect of Salinity Stress on Growth and Metabolomic Profiling of Cucumis sativus and Solanum lycopersicum
1
Biology Department, College of Science, Jouf University, Sakaka P.O. Box 2014, Saudi Arabia
2
Botany Department, Faculty of Science, Aswan University, Aswan 81528, Egypt
*
Author to whom correspondence should be addressed.
Plants 2020, 9(11), 1626; https://doi.org/10.3390/plants9111626
Received: 23 October 2020
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Revised: 16 November 2020
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Accepted: 17 November 2020
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Published: 23 November 2020
(This article belongs to the Special Issue Effects of Abiotic Stress on Plants 2020–2021)
Seeds germination and seedlings growth of Cucumis sativus and Solanum lycopersicum were monitored in in vitro and in vivo experiments after application of different concentrations of NaCl (25, 50, 100 and 200 mM). Photosynthetic pigments content and the biochemical responses of C. sativus and S. lycopersicum were assessed. Salinity stress slightly delayed the seeds germination rate and significantly reduced the percentage of germination as well as shoot length under the highest salt concentration (200 mM) in cucumber. Furthermore, root length was decreased significantly in all treatments. Whereas, in tomato, a prominent delay in seeds germination rate, the germination percentage and seedlings growth (shoot and root lengths) were significantly influenced under all concentrations of NaCl. Fresh and dry weights were reduced prominently in tomato compared to cucumber. Photosynthetic pigments content was reduced but with pronounced decreasing in tomato compared to cucumber. Secondary metabolites profiling in both plants under stress was varied from tomato to cucumber. The content of saponins, proline and total antioxidant capacity was reduced more prominently in tomato as compared to cucumber. On the other hand, the content of phenolics and flavonoids was increased in both plants with pronounced increase in tomato particularly under the highest level of salinity stress. The metabolomic profiling in stressful plants was significantly influenced by salinity stress and some bioactive secondary metabolites was enhanced in both cucumber and tomato plants. The enhancement of secondary metabolites under salinity stress may explain the tolerance and sensitivity of cucumber and tomato under salinity stress. The metabolomic evaluation combined with multivariate data analysis revealed a similar mechanism of action of plants to mediate stress, with variant level of this response in both plant species. Based on these results, the effect of salinity stress on seeds germination, seedlings growth and metabolomic content of plants was discussed in terms of tolerance and sensitivity of plants to salinity stress.
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Keywords:
cucumber; metabolomic; PCA; photosynthetic pigments; root length; tomato; shoot length
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MDPI and ACS Style
Abdel-Farid, I.B.; Marghany, M.R.; Rowezek, M.M.; Sheded, M.G. Effect of Salinity Stress on Growth and Metabolomic Profiling of Cucumis sativus and Solanum lycopersicum. Plants 2020, 9, 1626. https://doi.org/10.3390/plants9111626
AMA Style
Abdel-Farid IB, Marghany MR, Rowezek MM, Sheded MG. Effect of Salinity Stress on Growth and Metabolomic Profiling of Cucumis sativus and Solanum lycopersicum. Plants. 2020; 9(11):1626. https://doi.org/10.3390/plants9111626
Chicago/Turabian StyleAbdel-Farid, Ibrahim B., Marwa R. Marghany, Mohamed M. Rowezek, and Mohamed G. Sheded. 2020. "Effect of Salinity Stress on Growth and Metabolomic Profiling of Cucumis sativus and Solanum lycopersicum" Plants 9, no. 11: 1626. https://doi.org/10.3390/plants9111626
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