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. 2022 Dec 23;28(1):100.
doi: 10.3390/molecules28010100.

Salicylic Acid's Impact on Growth, Photosynthesis, and Antioxidant Enzyme Activity of Triticum aestivum When Exposed to Salt

Pravej Alam  1 , Thamer Al Balawi  1 , Mohammad Faizan  2
Affiliations

Salicylic Acid's Impact on Growth, Photosynthesis, and Antioxidant Enzyme Activity of Triticum aestivum When Exposed to Salt

Pravej Alam et al. Molecules. .

Abstract

Recently, the application of salicylic acid (SA) for improving a plant's resistance to abiotic stresses has increased. A large part of the irrigated land (2.1% out of 19.5%) is severely affected by salinity stress worldwide. In 2020, total production of wheat (Triticum aestivum) was 761 million tons, representing the second most produced cereal after maize; therefore, research on its salinity tolerance is of world concern. Photosynthetic attributes such as net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 concentration (Ci), and transpiration rate (E) were increased significantly by the application of SA. Salt stress increased antioxidant enzyme activity; however, SA further boosted their activity along with proline level. We conclude that SA interacts with meristematic cells, thereby triggering biochemical pathways conductive to the increment in morphological parameters. Further research is required to dissect the mechanisms of SA within the wheat plants under stress.

Keywords: abiotic stress; biochemical pathway; salicylic acid; transpiration rate.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Effect of salicylic acid (500 µM) on shoot length (A), root length (B), shoot fresh mass (C), root fresh mass (D), shoot dry mass (E), and root dry mass (F) of wheat at 30 DAS under NaCl (150 mM) stress. All data are the mean of five replicates (n = 5), and vertical bars shows standard errors (±SE).
Figure 2
Figure 2
Effect of salicylic acid (500 µM) on chlorophyll index (A), PN (B), gs (C), Ci (D), and E (E) of wheat at 30 DAS under NaCl (150 mM) stress. All data are the mean of five replicates (n = 5), and vertical bars shows standard errors (±SE).
Figure 3
Figure 3
Effect of salicylic acid (500 µM) on the activity of SOD (A), CAT (B), and POX (C), as well as on the proline content (D), of wheat at 30 DAS under NaCl (150 mM) stress. All data are the mean of five replicates (n = 5), and vertical bars shows standard errors (±SE).
See this image and copyright information in PMC

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