Abstract
Increasing soil salinity suppresses both productivity and fiber quality of cotton, thus, an appropriate management approach needs to be developed to lessen the detrimental effect of salinity stress. This study assessed two cotton genotypes with different salt sensitivities to investigate the possible role of nitrogen supplementation at the seedling stage. Salt stress induced by sodium chloride (NaCl, 200 mmol·L−1) decreased the growth traits and dry mass production of both genotypes. Nitrogen supplementation increased the plant water status, photosynthetic pigment synthesis, and gas exchange attributes. Addition of nitrogen to the saline media significantly decreased the generation of lethal oxidative stress biomarkers such as hydrogen peroxide, lipid peroxidation, and electrolyte leakage ratio. The activity of the antioxidant defense system was upregulated in both saline and non-saline growth media as a result of nitrogen application. Furthermore, nitrogen supplementation enhanced the accumulation of osmolytes, such as soluble sugars, soluble proteins, and free amino acids. This established the beneficial role of nitrogen by retaining additional osmolality to uphold the relative water content and protect the photosynthetic apparatus, particularly in the salt-sensitive genotype. In summary, nitrogen application may represent a potential strategy to overcome the salinity-mediated impairment of cotton to some extent.
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Claims 7
Claim · model-written summary
Salt stress reduced growth traits and dry mass in both cotton genotypes.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- Salt stress induced by sodium chloride (NaCl, 200 mmol·L−1)e0
- Outcome
- growth traits and dry mass productione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress induced by sodium chloride (NaCl, 200 mmol·L−1) decreased the growth traits and dry mass production of both genotypes.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
Nitrogen increased water status, pigment synthesis and gas exchange.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Nitrogen supplementatione0
- Outcome
- plant water status, photosynthetic pigment synthesis, and gas exchange attributese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen supplementation increased the plant water status, photosynthetic pigment synthesis, and gas exchange attributes.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
Nitrogen in saline media reduced hydrogen peroxide, lipid peroxidation and electrolyte leakage.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Addition of nitrogen to the saline mediae0
- Outcome
- hydrogen peroxide, lipid peroxidation, and electrolyte leakage ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of nitrogen to the saline media significantly decreased the generation of lethal oxidative stress biomarkers such as hydrogen peroxide, lipid peroxidation, and electrolyte leakage ratio.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
Nitrogen upregulated antioxidant defense in saline and non-saline media.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- nitrogen applicatione0
- Outcome
- activity of the antioxidant defense systeme0
- Direction
- upregulatede0
- Qualifier
- both saline and non-saline growth mediae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of the antioxidant defense system was upregulated in both saline and non-saline growth media as a result of nitrogen application.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
Nitrogen increased soluble sugars, proteins and free amino acids.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- nitrogen supplementatione0
- Outcome
- soluble sugars, soluble proteins, and free amino acidse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen supplementation enhanced the accumulation of osmolytes, such as soluble sugars, soluble proteins, and free amino acids.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
The authors inferred that nitrogen supported osmolality, water content and photosynthesis, especially in the sensitive genotype.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- nitrogene0
- Outcome
- relative water content and protect the photosynthetic apparatuse0
- Qualifier
- particularly in the salt-sensitive genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the beneficial role of nitrogen by retaining additional osmolality to uphold the relative water content and protect the photosynthetic apparatus, particularly in the salt-sensitive genotype.”
e1“two cotton genotypes with different salt sensitivities”
Claim · model-written summary
The authors suggest nitrogen application as a strategy against salinity impairment.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- nitrogen applicatione0
- Outcome
- overcome the salinity-mediated impairment of cottone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen application may represent a potential strategy to overcome the salinity-mediated impairment of cotton to some extent.”
e1“two cotton genotypes with different salt sensitivities”
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