Abstract
Wheat is affected by various biotic and abiotic stresses, especially salinity, which reduces the growth and yield drastically. High salinity is a major constraint for wheat productivity in many countries, including Bangladesh. With this view, here, an experiment was conducted to observe genotypic differences in physiological, ion accumulation, agro-morphological and yield performance of wheat against different levels of salinity. Experimental variables consisted of five salt tolerant genotypes (G 20–2–2, G 20–1–2, G 13–2, G 22–2, G 9–2), one susceptible genotype (G 24–2) and one standard check variety (BARI ghom 25), which assigned to four levels of salinity with electrical conductivities control (0.3), 4, 8 and 12 dS m −1 . Irrespective of genotypes, salinity stress significantly decreased the yield and yield attributes. Results of analyses based on salt tolerance indices of plant growth related and yield contributing parameters, ionic balance (Na + , K + and Na + / K + ratio), and stress indicators such as chlorophyll content, photosynthetic rate (Pn), stomatal conductance (gs) and transpiration rate (Tr) revealed genotypes G 20–2–2, G 13–2 and G 20–1–2 as salt tolerant, genotype G 9–2 as moderately salt-tolerant and G 24–2 and G 22–2 as salt-sensitive genotypes. Additionally, lower accumulations of hydrogen peroxide and malondialdehyde, and higher activities of antioxidant enzymes in the salt-tolerant genotypes G 20–2–2 and G 13–2 than in the salt-sensitive genotype G 24–2 indicated reduced oxidative damage in genotypes G 20–2–2 and G 13–2 relative to that in genotype G 24–2. Collectively, our findings suggest that the optimum growth and yield of salt tolerant genotypes are associated with decreased Na + / K + ratio, increased antioxidant enzymes activity and reduced oxidative stress .
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Claims 7
Claim · model-written summary
Salinity significantly decreased wheat yield and yield attributes.
- Taxon
- wheat
Triticum aestivume0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrespective of genotypes, salinity stress significantly decreased the yield and yield attributes.”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
G 20–2–2, G 13–2 and G 20–1–2 were classified salt tolerant.
- Taxon
- wheatTriticum aestivume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“revealed genotypes G 20–2–2, G 13–2 and G 20–1–2 as salt tolerant”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
G 9–2 was moderately salt tolerant.
- Taxon
- wheatTriticum aestivume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotype G 9–2 as moderately salt-tolerant”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
G 24–2 and G 22–2 were salt sensitive.
- Taxon
- wheatTriticum aestivume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“G 24–2 and G 22–2 as salt-sensitive genotypes”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
Tolerant G 20–2–2 and G 13–2 accumulated less hydrogen peroxide and malondialdehyde than sensitive G 24–2.
- Taxon
- wheatTriticum aestivume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower accumulations of hydrogen peroxide and malondialdehyde, and higher activities of antioxidant enzymes in the salt-tolerant genotypes G 20–2–2 and G 13–2 than in the salt-sensitive genotype G 24–2”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
Tolerant G 20–2–2 and G 13–2 had higher antioxidant enzyme activity than G 24–2.
- Taxon
- wheatTriticum aestivume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower accumulations of hydrogen peroxide and malondialdehyde, and higher activities of antioxidant enzymes in the salt-tolerant genotypes G 20–2–2 and G 13–2 than in the salt-sensitive genotype G 24–2”
e1“performance of wheat against different levels of salinity”
Claim · model-written summary
Salt-tolerant wheat growth and yield were associated with decreased sodium-potassium ratio, increased antioxidant activity, and reduced oxidative stress.
- Taxon
- wheatTriticum aestivume0e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum growth and yield of salt tolerant genotypes are associated with decreased Na + / K + ratio, increased antioxidant enzymes activity and reduced oxidative stress”
e1“performance of wheat against different levels of salinity”
The same questions in other papers
salinity · yield · Triticum aestivum (wheat)Positive and negative results
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