Abstract
Salinity stress significantly hampers cotton seed germination and seedling growth. Employing plant growth regulators stands out as an effective strategy to mitigate salt stress. In this study, we assessed the impact of varying concentrations of natural composite salt conditions (0%, 0.6%, and 1.2%) on cotton seed germination, seedling growth, and physiology. Additionally, we explored the effects of compound sodium nitrophenolate (CSN: 2 mg·L−1 and 10 mg·L−1), 24-epibrassinolide (EBR: 0.02 mg·L−1 and 0.1 mg·L−1), and gibberellic acid (GA: 60 mg·L−1 and 300 mg·L−1), against a control (CK: distilled water) group. The results indicate that with an increase in the composite salt concentration, the germination potential (GP) and germination rate (GR) of cotton seeds gradually decrease. Simultaneously, the fresh weight and root vitality of seedlings also correspondingly decrease, while the degree of membrane lipid peroxidation increases. Under high-salt (1.2%) conditions, soaking treatments with CSN and EBR significantly enhance both GP (45–59% and 55–64%) and GR (30–33% and 39–36%) compared to the CK. However, the GA treatment does not increase the GP and GR of cotton. Moreover, under high-salt (1.2%) conditions, CSN and EBR treatments result in the increased activities of superoxide dismutase (56–66% and 71–80%), peroxidase (20–24% and 37–51%), and catalase (26–32% and 35–46%). Consequently, cotton exhibits a relatively good tolerance to natural composite salts. Soaking treatments with CSN and EBR effectively improve cotton germination by enhancing antioxidant enzyme activities, thereby strengthening cotton’s tolerance to salt stress. These findings offer new insights for enhancing the salt tolerance of cotton.
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Claims 6
Claim · model-written summary
Increasing salt decreased cotton germination potential and rate.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- composite salt concentratione0
- Outcome
- germination potential (GP) and germination rate (GR)e0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with an increase in the composite salt concentration, the germination potential (GP) and germination rate (GR) of cotton seeds gradually decrease”
Claim · model-written summary
Increasing salt decreased seedling fresh weight and root vitality and increased membrane lipid peroxidation.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- seedlingse0
- Outcome
- fresh weight and root vitality of seedlingse0
- Direction
- decreasee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fresh weight and root vitality of seedlings also correspondingly decrease, while the degree of membrane lipid peroxidation increases”
t0“Cotton”
Claim · model-written summary
CSN and EBR significantly enhanced cotton germination potential and rate under high salt.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- soaking treatments with CSN and EBRe0
- Outcome
- GPe0
- Direction
- enhancee0
- Value
- 45–59%e0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under high-salt (1.2%) conditions, soaking treatments with CSN and EBR significantly enhance both GP (45–59% and 55–64%) and GR (30–33% and 39–36%) compared to the CK”
t0“Cotton”
Claim · model-written summary
GA did not increase cotton germination potential or rate.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- GA treatmente0
- Outcome
- GP and GRe0
- Direction
- does not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the GA treatment does not increase the GP and GR of cotton”
Claim · model-written summary
CSN and EBR increased antioxidant enzyme activities under high salt.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- CSN and EBR treatmentse0
- Outcome
- activities of superoxide dismutasee0
- Direction
- increasede0
- Value
- 56–66%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under high-salt (1.2%) conditions, CSN and EBR treatments result in the increased activities of superoxide dismutase (56–66% and 71–80%), peroxidase (20–24% and 37–51%), and catalase (26–32% and 35–46%)”
t0“Cotton”
Claim · model-written summary
The authors attributed improved cotton germination and salt tolerance to enhanced antioxidant enzymes after CSN and EBR soaking.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Soaking treatments with CSN and EBRe0
- Outcome
- cotton germinatione0
- Qualifier
- enhancing antioxidant enzyme activitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soaking treatments with CSN and EBR effectively improve cotton germination by enhancing antioxidant enzyme activities, thereby strengthening cotton’s tolerance to salt stress”
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