Abstract
The objective of this study was to determine the effect of 24-epibrassinolide (24-EBL) applications on growth, chlorophyll, and mineral content of lettuce ( Lactuca sativa L. var. Crispa) grown under salt stress. The study was conducted in pot experiments under greenhouse conditions. Lettuce seedlings were treated with seed and foliar 24-EBL applications at different concentrations (0, 1, 2, and 3 μM). Salinity treatments were established by adding 0, 50, and 100 m m of sodium chloride (NaCl) to a base complete nutrient solution. Results showed that salt stress negatively affected the growth and mineral content of lettuce plants. However, seed and foliar applications of 24-EBL resulted in greater shoot fresh weight, shoot dry weight, root fresh weight, and root dry weight as well as higher stem diameter than the control under salt stress. Salinity treatments induced significant increases in electrolyte leakage of plant, but foliar 24-EBL application reduced leaf electrolyte leakage and has determined lower values of leaf electrolyte leakage than non-treated ones. In regard to nutrient content, it can be inferred that 24-EBL applications increased almost all nutrient content in leaves and roots of lettuce plants under salt stress. Generally, the greatest values were obtained from 3 μM 24-EBL application. Treatments of 24-EBL alleviated the negative effect of salinity on the growth of lettuce.
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Claims 8
Claim · model-written summary
Salt stress negatively affected lettuce growth and mineral content
- Taxon
- Lactuca sativa L. var. Crispa
Lactuca sativat0 - Treatment
- salt stresse1
- Outcome
- growth and mineral contente1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e1“salt stress negatively affected the growth and mineral content of lettuce plants”
Claim · model-written summary
Seed and foliar 24-EBL applications increased shoot fresh and dry weight of lettuce under salt stress compared with the control
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- seed and foliar applications of 24-EBLe2
- Outcome
- shoot fresh weight, shoot dry weighte2
- Direction
- greatere2
- Qualifier
- under salt stresse3
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e2“seed and foliar applications of 24-EBL resulted in greater shoot fresh weight, shoot dry weight, root fresh weight, and root dry weight”
e3“as well as higher stem diameter than the control under salt stress”
Claim · model-written summary
Seed and foliar 24-EBL applications increased root fresh and dry weight of lettuce under salt stress compared with the control
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- seed and foliar applications of 24-EBLe2
- Outcome
- root fresh weight, and root dry weighte2
- Direction
- greatere2
- Qualifier
- under salt stresse3
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e2“seed and foliar applications of 24-EBL resulted in greater shoot fresh weight, shoot dry weight, root fresh weight, and root dry weight”
e3“as well as higher stem diameter than the control under salt stress”
Claim · model-written summary
Seed and foliar 24-EBL applications increased stem diameter of lettuce under salt stress compared with the control
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- seed and foliar applications of 24-EBLe2
- Outcome
- stem diametere3
- Direction
- highere3
- Qualifier
- under salt stresse3
- Comparator
- controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e2“seed and foliar applications of 24-EBL resulted in greater shoot fresh weight, shoot dry weight, root fresh weight, and root dry weight”
e3“as well as higher stem diameter than the control under salt stress”
Claim · model-written summary
Foliar 24-EBL application reduced leaf electrolyte leakage compared with non-treated plants under salt stress
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- foliar 24-EBL applicatione4
- Outcome
- leaf electrolyte leakagee4
- Direction
- reducede4
- Comparator
- non-treated onese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e4“foliar 24-EBL application reduced leaf electrolyte leakage and has determined lower values of leaf electrolyte leakage than non-treated ones”
Claim · model-written summary
Salinity treatments significantly increased electrolyte leakage of lettuce plants
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- Salinity treatmentse5
- Outcome
- electrolyte leakage of plante5
- Direction
- increasese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e5“Salinity treatments induced significant increases in electrolyte leakage of plant”
Claim · model-written summary
24-EBL applications increased almost all nutrient contents in lettuce leaves and roots under salt stress
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Organ / stage
- leaves and rootse6
- Treatment
- 24-EBL applicationse6
- Outcome
- nutrient contente6
- Direction
- increasede6
- Qualifier
- almost alle6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e6“24-EBL applications increased almost all nutrient content in leaves and roots of lettuce plants under salt stress”
Claim · model-written summary
The greatest lettuce values were obtained with 3 μM 24-EBL application
- Taxon
- Lactuca sativa L. var. CrispaLactuca sativat0
- Treatment
- 3 μM 24-EBL applicatione7
- Outcome
- valuese7
- Direction
- greateste7
- Qualifier
- Generallye7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lettuce (Lactuca sativa L. var. Crispa)”
e7“Generally, the greatest values were obtained from 3 μM 24-EBL application”
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