Abstract
Among the chemicals that their effects on reducing chilling injury has recently been studied are salicylates and jasmonates. Therefore, in this study the effects of salicylic acid and methyl jasmonate on increasing the cold tolerance of bell pepper cv. Emily was examined. Experiment was done as a 7×2 factorial in the completely randomized design (CRD) with four replications. The first factor contained salicylic acid in three concentrations of 0.1, 0.5 and 1 mM and methyl jasmonate at the rates of 0.001, 0.01 and 0.1 mM plus control (distilled water) and the second factor involved application of hormone, spraying whole plant and soil drenching. Treatments were applied at 7-9 leaves stage. After application of hormones, plants moved to 0º C for 3 days and then returned back to greenhouse temperature. Three days later different attributes were measured. Results showed that except for soluble sugars and leaf proline, there was no significant differences between two methods of hormone application. For all traits, application of hormone showed significant effects but due to significant interactions between hormone and application method, the effect of hormone treatment depended on the method of application. Drenching 0.5 mM salicylic acid reduced chilling injury (necrotic lesions) and increased quantum efficiency of PSII (Fv/Fm), chlorophyll content, soluble sugars and leaf proline, compared to untreated plants, thus improved cold tolerance. Methyl jasmonate in the rate of 0.01 mM reduced chilling injury and increased Fv/Fm in comparison with control, but only when it was used as drench it increased concentrations of chlorophyll a and b and soluble sugars and cold tolerance compared to other two concentrations.
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Claims 9
Claim · model-written summary
Application method showed no significant difference for traits other than soluble sugars and leaf proline.
- Taxon
- Bell Peppert0
- Treatment
- two methods of hormone applicatione0
- Outcome
- no significant differencese0
- Direction
- no significant differencese0
- Qualifier
- except for soluble sugars and leaf prolinee0
Not reportedComparator
Verbatim
e0“except for soluble sugars and leaf proline, there was no significant differences between two methods of hormone application.”
t0“Bell Pepper”
Claim · model-written summary
Hormone treatment significantly affected all traits, with effects dependent on application method.
- Taxon
- Bell Peppert0
- Treatment
- application of hormonee0
- Outcome
- all traitse0
- Qualifier
- depended on the method of applicatione0
Not reportedComparatorDirection
Verbatim
e0“For all traits, application of hormone showed significant effects but due to significant interactions between hormone and application method, the effect of hormone treatment depended on the method of application.”
t0“Bell Pepper”
Claim · model-written summary
Drenched 0.5 mM salicylic acid reduced chilling injury relative to untreated plants.
Verbatim
e0“Drenching 0.5 mM salicylic acid reduced chilling injury (necrotic lesions) and increased quantum efficiency of PSII (Fv/Fm), chlorophyll content, soluble sugars and leaf proline, compared to untreated plants, thus improved cold tolerance.”
t0“Bell Pepper”
Claim · model-written summary
Drenched 0.5 mM salicylic acid increased PSII efficiency, chlorophyll and soluble sugars.
Verbatim
e0“Drenching 0.5 mM salicylic acid reduced chilling injury (necrotic lesions) and increased quantum efficiency of PSII (Fv/Fm), chlorophyll content, soluble sugars and leaf proline, compared to untreated plants, thus improved cold tolerance.”
t0“Bell Pepper”
Claim · model-written summary
Drenched 0.5 mM salicylic acid increased leaf proline.
Verbatim
e0“Drenching 0.5 mM salicylic acid reduced chilling injury (necrotic lesions) and increased quantum efficiency of PSII (Fv/Fm), chlorophyll content, soluble sugars and leaf proline, compared to untreated plants, thus improved cold tolerance.”
t0“Bell Pepper”
Claim · model-written summary
0.01 mM methyl jasmonate reduced chilling injury relative to control.
Verbatim
e0“Methyl jasmonate in the rate of 0.01 mM reduced chilling injury and increased Fv/Fm in comparison with control”
t0“Bell Pepper”
Claim · model-written summary
0.01 mM methyl jasmonate increased Fv/Fm relative to control.
Verbatim
e0“Methyl jasmonate in the rate of 0.01 mM reduced chilling injury and increased Fv/Fm in comparison with control”
t0“Bell Pepper”
Claim · model-written summary
Drenched 0.01 mM methyl jasmonate increased chlorophyll a and b and soluble sugars compared with other concentrations.
Verbatim
e0“only when it was used as drench it increased concentrations of chlorophyll a and b and soluble sugars and cold tolerance compared to other two concentrations.”
e1“Methyl jasmonate in the rate of 0.01 mM”
t0“Bell Pepper”
Claim · model-written summary
Drenched 0.01 mM methyl jasmonate increased cold tolerance compared with other concentrations.
Verbatim
e0“only when it was used as drench it increased concentrations of chlorophyll a and b and soluble sugars and cold tolerance compared to other two concentrations.”
e1“Methyl jasmonate in the rate of 0.01 mM”
t0“Bell Pepper”
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