Abstract
Tolerance of crops to abiotic stresses can vary among cultivars and due to the phenotypic stage of development. The aim of this study was to evaluate the salinity effects on germination, seedling establishment and physiological changes on grain (BRS 310) and forage sorghum (BRS 800). Sorghum seeds were sown between two paper towels moistened with deionized water and also NaCl solution (50 mM) for 10 days. We evaluated the germination percentage, growth parameters, contents of inorganic and organic solutes and activity of antioxidant enzymes. The salinity did not affect sorghum seeds germination, however, it caused a reduction in the development of the seedlings. Both genotypes presented similar growth parameters under optimum and salt stress conditions, with exception for decreases in shoot length and shoot dry mass of BRS 800 genotype under salinity. Similar results for inorganic solutes accumulation in both genotypes suggest that osmotic adjustment cannot be considered as one of the strategies used by these genotypes to attenuate the NaCl effects. BRS 310 genotype is more tolerant to salinity than BRS 800 genotype and it is likely to be related to a better protection mechanism against oxidative damage by inducing activities of antioxidant enzymes, such as ascorbate peroxidase and catalase. This study highlights the importance of these enzymes in the establishment of salttolerant sorghum seedlings under salinity conditions.
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Claims 7
Claim · model-written summary
NaCl did not change sorghum seed germination compared with deionized water.
- Treatment
- NaCl solution (50 mM)e0
- Outcome
- seeds germinatione1
- Direction
- no_changeinferrede1
- Comparator
- deionized watere0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e0“Sorghum seeds were sown between two paper towels moistened with deionized water and also NaCl solution (50 mM) for 10 days”
e1“The salinity did not affect sorghum seeds germination”
Claim · model-written summary
NaCl reduced the development of sorghum seedlings compared with deionized water.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e0“Sorghum seeds were sown between two paper towels moistened with deionized water and also NaCl solution (50 mM) for 10 days”
e2“it caused a reduction in the development of the seedlings”
Claim · model-written summary
Growth parameters of the grain sorghum BRS 310 were similar under optimum and salt stress conditions.
- Material
- BRS 310e7
- Treatment
- salt stresse3
- Outcome
- growth parameterse3
- Direction
- similare3
- Qualifier
- BRS 800e3
- Comparator
- optimume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e3“Both genotypes presented similar growth parameters under optimum and salt stress conditions, with exception for decreases in shoot length and shoot dry mass of BRS 800 genotype under salinity”
e7“on grain (BRS 310) and forage sorghum (BRS 800)”
Claim · model-written summary
The forage sorghum BRS 800 decreased shoot length and shoot dry mass under salinity compared with optimum conditions.
- Material
- BRS 800e3
- Treatment
- salinitye3
- Outcome
- shoot length and shoot dry masse3
- Direction
- decreasese3
- Comparator
- optimume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e3“Both genotypes presented similar growth parameters under optimum and salt stress conditions, with exception for decreases in shoot length and shoot dry mass of BRS 800 genotype under salinity”
Claim · model-written summary
Inorganic solute accumulation under NaCl was similar in both sorghum genotypes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e0“Sorghum seeds were sown between two paper towels moistened with deionized water and also NaCl solution (50 mM) for 10 days”
e4“Similar results for inorganic solutes accumulation in both genotypes”
Claim · model-written summary
BRS 310 was more tolerant to salinity than BRS 800.
- Material
- BRS 310e5
- Treatment
- salinitye5
- Outcome
- tolerant to salinitye5
- Direction
- more tolerante5
- Comparator
- BRS 800e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e5“BRS 310 genotype is more tolerant to salinity than BRS 800 genotype”
Claim · model-written summary
BRS 310 tolerance is likely related to better protection against oxidative damage through induced ascorbate peroxidase and catalase.
- Material
- BRS 310e5
- Gene
- ascorbate peroxidase and catalasee6
- Outcome
- a better protection mechanism against oxidative damagee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in grain and forage sorghum”
e5“BRS 310 genotype is more tolerant to salinity than BRS 800 genotype”
e6“it is likely to be related to a better protection mechanism against oxidative damage by inducing activities of antioxidant enzymes, such as ascorbate peroxidase and catalase”
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