Evaluating the contribution of osmotic and oxidative stress components on barley growth under salt stress

Ouertani, Rim Nefissi; Abid, Ghassen; Karmous, Chahine; Chikha, Mariem Ben; Boudaya, Oumaima; Mahmoudi, Henda; Mejri, Samiha; Jansen, Robert K.; Ghorbel, Abdelwahed

doi:10.1093/aobpla/plab034

Cited by 22 publications

(7 citation statements)

References 47 publications

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“…The bud length was also inhibited with the increase in compound salt concentration. This is consistent with the results of Nefissi Ouertani et al [27,28]. Salt stress caused plant metabolism disorder, disrupted development, decreased the net photosynthetic rate and increased activities of antioxidant enzymes [29,30].…”

Section: Germinationsupporting

confidence: 92%

Effects of Compound Salt Concentration on Growth, Physiological and Nutritional Value of Hydroponic Forage Wheat

Ma,

Wang,

Sun

et al. 2023

Agriculture

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(1) Background: Hydroponic forage plays an increasingly important role in animal breeding during winter and spring in arid and cold regions due to its rich nutrient and good palatability. In the present study, the profiles of growth, physiological indexes, nutritional value and in vitro degradation of hydroponic forage cultivated with different salt concentration were evaluated. (2) Methods: The compound salt was extracted from soil surrounding the Tarim River Basin, and five compound salt solution treatment groups (three replicates each) with concentrations of 0%, 0.4%, 0.8%, 1.2% and 1.6% were prepared. Winter wheat seeds were selected as hydroponic forage for germination experiments, and the germination, physiological indicators, nutritional value and in vitro fermentation degradation rate were analyzed. (3) Results: The results showed that the germination and growth of hydroponic herbage were significantly (p < 0.05) inhibited by compound salt concentration higher than 0.8% from the third day. Compared with the 0% concentration group, the chlorophyll content in the 0.4% concentration group was significantly increased (p < 0.05), and contents of chlorophyll a, chlorophyll b and total chlorophyll were 729.71 mg·g−1, 223.19 mg·g−1 and 952.9 mg·g−1, respectively. The total chlorophyll content in the 0.8% and 1.2% concentration groups were significantly lower than those in the 0% and 0.4% concentration groups (p < 0.05), and in the 1.6% concentration group, the content undetected. With the increase in compound salt concentration, the contents of soluble sugar and proline were significantly increased (p < 0.05). The nutrient compositions were significantly increased (p < 0.05) under the 0.4% and 0.8% concentration groups, in which the content of crude protein in 0.4% concentration group was 15.23%. The results of gas production and fermentation parameters suggested that the 0.8% concentration group could enhance rumen fermentation characteristics. (4) Conclusions: In summary, 0.8% as the upper limit concentration and 0% to 0.4% as the optimal concentration range of compound salt can be considered for cultivating hydroponic forage wheat.

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Section: Germinationsupporting

confidence: 92%

Effects of Compound Salt Concentration on Growth, Physiological and Nutritional Value of Hydroponic Forage Wheat

Ma,

Wang,

Sun

et al. 2023

Agriculture

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“…The destructive effect of salt stress on lipid peroxidation has already been shown by Zeeshan et al (2020) who found a higher MDA content in salt-tolerant than salt-sensitive genotype and that MDA can potentially be used as an indicator of salt tolerance in wheat and barley. Nefissi Ouertani et al (2021) also observed an association between low MDA content and higher salt-stress tolerance in barley.…”

Section: Discussionmentioning

confidence: 67%

Physiological and Transcriptome Indicators of Salt Tolerance in Wild and Cultivated Barley

et al. 2022

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Barley is used as a model cereal to decipher salt tolerance mechanisms due to its simpler genome than wheat and enhanced salt tolerance compared to rice and wheat. In the present study, RNA-Seq based transcriptomic profiles were compared between salt-tolerant wild (Hordeum spontaneum, genotype no. 395) genotype and salt-sensitive cultivated (H. vulgare, ‘Mona’ cultivar) subjected to salt stress (300 mM NaCl) and control (0 mM NaCl) conditions. Plant growth and physiological attributes were also evaluated in a separate experiment as a comparison. Wild barley was significantly less impacted by salt stress than cultivated barley in growth and physiology and hence was more stress-responsive functionally. A total of 6,048 differentially expressed genes (DEGs) including 3,025 up-regulated and 3,023 down-regulated DEGs were detected in the wild genotype in salt stress conditions. The transcripts of salt-stress-related genes were profoundly lower in the salt-sensitive than the tolerant barley having a total of 2,610 DEGs (580 up- and 2,030 down-regulated). GO enrichment analysis showed that the DEGs were mainly enriched in biological processes associated with stress defenses (e.g., cellular component, signaling network, ion transporter, regulatory proteins, reactive oxygen species (ROS) scavenging, hormone biosynthesis, osmotic homeostasis). Comparison of the candidate genes in the two genotypes showed that the tolerant genotype contains higher functional and effective salt-tolerance related genes with a higher level of transcripts than the sensitive one. In conclusion, the tolerant genotype consistently exhibited better tolerance to salt stress in physiological and functional attributes than did the sensitive one. These differences provide a comprehensive understanding of the evolved salt-tolerance mechanism in wild barley. The shared mechanisms between these two sub-species revealed at each functional level will provide more reliable insights into the basic mechanisms of salt tolerance in barley species.

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“…However, it was possible to identify lines that showed high rates of root growth in both medium and high salinities, some due to having high levels of root growth in control conditions, such as Floye, and others despite not, such as Bere 49 A 27 Shetland. The latter of these are of most interesting as it has been shown that the maintenance of root elongation, in saline conditions that inhibit the normal shoot growth of the seedling, is indicative of an adaptive method to safeguard uptake of nutrients and water ( Shelden et al, 2020 ), with other experiments showing salinity tolerant lines having shorter roots in control conditions but maintaining them in saline conditions ( Adjel et al, 2013 ; Nefissi Ouertani et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Evaluating Variation in Germination and Growth of Landraces of Barley (Hordeum vulgare L.) Under Salinity Stress

et al. 2022

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Ongoing climate change is resulting in increasing areas of salinity affected soils, rising saline groundwater and droughts resulting in irrigation with brackish water. This leads to increased salinity stress in crops that are already grown on marginal agricultural lands, such as barley. Tolerance to salinity stress is limited in the elite barley cultivar pools, but landraces of barley hold potential sources of tolerance due to their continuous selection on marginal lands. This study analyzed 140 heritage cultivars and landrace lines of barley, including 37 Scottish Bere lines that were selected from coastal regions, to screen for tolerance to salinity stress. Tolerance to salinity stress was screened by looking at the germination speed and the early root growth during germination, and the pre-maturity biomass accumulation during early growth stages. Results showed that most lines increased germination time, and decreased shoot biomass and early root growth with greater salinity stress. Elite cultivars showed increased response to the salinity, compared to the landrace lines. Individual Bere and landrace lines showed little to no effect of increased salinity in one or more experiments, one line showed high salinity tolerance in all experiments—Bere 49 A 27 Shetland. A Genome Wide Association Screening identified a number of genomic regions associated with increased tolerance to salinity stress. Two chromosomal regions were found, one associated with shoot biomass on 5HL, and another associated with early root growth, in each of the salinities, on 3HS. Within these regions a number of promising candidate genes were identified. Further analysis of these new regions and candidate genes should be undertaken, along with field trials, to identify targets for future breeding for salinity tolerance.

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Evaluating the contribution of osmotic and oxidative stress components on barley growth under salt stress

Cited by 22 publications

References 47 publications

Effects of Compound Salt Concentration on Growth, Physiological and Nutritional Value of Hydroponic Forage Wheat

Effects of Compound Salt Concentration on Growth, Physiological and Nutritional Value of Hydroponic Forage Wheat

Physiological and Transcriptome Indicators of Salt Tolerance in Wild and Cultivated Barley

Evaluating Variation in Germination and Growth of Landraces of Barley (Hordeum vulgare L.) Under Salinity Stress

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