Abstract
The possible alleviating effects of salicylic acid on protection of cowpea (Vigna unguiculata) cv. Parastu under water stress conditions were investigated in the University of Zanjan Agriculture Research Station during 2008. Water stress was imposed by withholding irrigation at 50% flowering (flowering water stress, FWS) and when 50% of the pods grew 2-3cm (pod-formation water stress, PFWS). Salicylic acid (SA) was sprayed when plants had approximately ten fully expanded leaves with different concentrations of 0, 150, 300, 450 and 600 µM. Water stress was found to affect net photosynthesis rate, relative water content and Chlorophyll index. Proline content and leaf temperature increased in response to water stress. In both water stress treatments, plants treated with 300µM SA showed the highest values for net photosynthesis rate, transpiration rate and proline concentration. In FWS, the lowest leaf temperature was recorded in the control plants. However, in PFWS, leaf temperature was not affected by SA treatment. In FWS condition, the application of 300 µM SA showed the highest leaf area. It seems that the application of SA in 300 µM concentration may improve plant functions in both normal and stress conditions.
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Claims 7
Claim · model-written summary
Water stress affected cowpea net photosynthesis rate, relative water content and chlorophyll index.
- Taxon
- Cowpea
Vigna unguiculatat0 - Treatment
- Water stresse0
- Outcome
- net photosynthesis rate, relative water content and Chlorophyll indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress was found to affect net photosynthesis rate, relative water content and Chlorophyll index.”
t0“Cowpea”
Claim · model-written summary
Water stress increased cowpea proline content and leaf temperature.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- water stresse0
- Outcome
- Proline content and leaf temperaturee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proline content and leaf temperature increased in response to water stress.”
t0“Cowpea”
Claim · model-written summary
Under both water stress treatments, 300µM salicylic acid gave the highest photosynthesis rate, transpiration rate and proline concentration.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 300µM SAe0
- Outcome
- net photosynthesis rate, transpiration rate and proline concentratione0
- Direction
- higheste0
- Qualifier
- both water stress treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both water stress treatments, plants treated with 300µM SA showed the highest values for net photosynthesis rate, transpiration rate and proline concentration.”
t0“Cowpea”
Claim · model-written summary
Under flowering water stress, control plants had the lowest leaf temperature.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- leaf temperaturee0
- Direction
- loweste0
- Qualifier
- FWSe0
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In FWS, the lowest leaf temperature was recorded in the control plants.”
t0“Cowpea”
Claim · model-written summary
Salicylic acid did not affect leaf temperature under pod formation water stress.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- SA treatmente0
- Outcome
- leaf temperaturee0
- Direction
- not affectede0
- Qualifier
- PFWSe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in PFWS, leaf temperature was not affected by SA treatment.”
t0“Cowpea”
Claim · model-written summary
Under flowering water stress, 300 µM salicylic acid gave the highest leaf area.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 300 µM SAe0
- Outcome
- leaf areae0
- Direction
- higheste0
- Qualifier
- FWS conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In FWS condition, the application of 300 µM SA showed the highest leaf area.”
t0“Cowpea”
Claim · model-written summary
The authors suggest that 300 µM salicylic acid may improve cowpea function under normal and stressed conditions.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- application of SA in 300 µM concentration may improve plant functionse0
- Qualifier
- both normal and stress conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It seems that the application of SA in 300 µM concentration may improve plant functions in both normal and stress conditions.”
t0“Cowpea”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.