Abstract
To investigate the effect of salicylic acid on photosynthetic system and seed yield in soybean genotypes under drought stress a factorial experiment was conducted in a completely randomized design in both greenhouse and laboratory of Mohaghegh Ardebili University in 2015. The factors consisted of water stress at 3 levels (85, 65 and 45% of field capacity), salicylic acid at 3 concentrations (0, 0.4 and 0.8 mM) and three soybean genotypes, Williams, D42X19, and L17. The results showed that the relative water content, stomatal conductance, chlorophyll a and b, chlorophyll a/b ratio, leaf area, maximum fluorescence and quantum yield decreased as the result to drought stress, while Williams showed more tolerance to drought stress as compared to other two genotypes. Application of 0.4 mM salicylic acid as compared to high concentration (0.8 mM) and control was the most effective treatment on reducing the adverse effects of drought stress. It could be said that this may increase the relative water and chlorophylls contents, leaf area, quantum yield and stomatal conductance under drought stress conditions. It seems that carotenoid contents as a result of drought stress and application of 0.8 mM salicylic acid were increased in soybean genotypes, especially in L17. SLA was also increased due to drought stress, which was higher in L17 genotype than other genotypes. According to the results of this study, williams genotype was the most tolerant to drought stress as compared to the other genotypes, and the application of salicylic acid would enhance tolerance to drought stress in soybean genotypes.
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Claims 10
Claim · model-written summary
Drought decreased relative water content and stomatal conductance in soybean.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- drought stresse0
- Outcome
- relative water content, stomatal conductancee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative water content, stomatal conductance, chlorophyll a and b, chlorophyll a/b ratio, leaf area, maximum fluorescence and quantum yield decreased as the result to drought stress”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
Drought decreased chlorophyll a and b and the chlorophyll a/b ratio.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- drought stresse0
- Outcome
- chlorophyll a and b, chlorophyll a/b ratioe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative water content, stomatal conductance, chlorophyll a and b, chlorophyll a/b ratio, leaf area, maximum fluorescence and quantum yield decreased as the result to drought stress”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
Drought decreased leaf area, maximum fluorescence and quantum yield.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- drought stresse0
- Outcome
- leaf area, maximum fluorescence and quantum yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area, maximum fluorescence and quantum yield decreased as the result to drought stress”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
Williams showed greater drought tolerance than the other two genotypes.
- Taxon
- SoybeanGlycine maxt0
- Material
- Williamse0
- Outcome
- tolerance to drought stresse0
- Direction
- moree0
- Comparator
- other two genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Williams showed more tolerance to drought stress as compared to other two genotypes”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
At 0.4 mM, salicylic acid most effectively reduced adverse drought effects compared with 0.8 mM and control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 0.4 mM salicylic acide0
- Outcome
- adverse effects of drought stresse0
- Direction
- reducinge0
- Comparator
- high concentration (0.8 mM) and controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 0.4 mM salicylic acid as compared to high concentration (0.8 mM) and control was the most effective treatment on reducing the adverse effects of drought stress”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
The authors suggested salicylic acid may increase relative water and chlorophyll contents and leaf area under drought.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 0.4 mM salicylic acide1
- Outcome
- relative water and chlorophylls contents, leaf areae0
- Direction
- increasee0
- Qualifier
- under drought stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It could be said that this may increase the relative water and chlorophylls contents, leaf area, quantum yield and stomatal conductance under drought stress conditions”
t0“Soybean (Glycin max L.)”
e1“Application of 0.4 mM salicylic acid”
Claim · model-written summary
The authors suggested salicylic acid may increase quantum yield and stomatal conductance under drought.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 0.4 mM salicylic acide1
- Outcome
- quantum yield and stomatal conductancee0
- Direction
- increasee0
- Qualifier
- under drought stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“may increase the relative water and chlorophylls contents, leaf area, quantum yield and stomatal conductance under drought stress conditions”
t0“Soybean (Glycin max L.)”
e1“Application of 0.4 mM salicylic acid”
Claim · model-written summary
Carotenoid contents appeared to increase under drought and 0.8 mM salicylic acid, especially in L17.
- Taxon
- soybeanGlycine maxe0
- Material
- L17e0
- Treatment
- drought stress and application of 0.8 mM salicylic acide0
- Outcome
- carotenoid contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carotenoid contents as a result of drought stress and application of 0.8 mM salicylic acid were increased in soybean genotypes, especially in L17”
Claim · model-written summary
Drought increased specific leaf area, with L17 higher than the other genotypes.
- Taxon
- SoybeanGlycine maxt0
- Material
- L17e0
- Treatment
- drought stresse0
- Outcome
- SLAe0
- Direction
- increasede0
- Comparator
- other genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SLA was also increased due to drought stress, which was higher in L17 genotype than other genotypes”
t0“Soybean (Glycin max L.)”
Claim · model-written summary
The authors concluded salicylic acid enhances drought tolerance in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- salicylic acide0
- Outcome
- tolerance to drought stresse0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of salicylic acid would enhance tolerance to drought stress in soybean genotypes”
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