Abstract
Enviromental stress gives rise to the activation of adaptation and defence responses in plants. It is known that the role of salicylic acid (SA) is quite important in this mechanism. In this study its effect was investigated on excised cotyledons of sunflower (Helianthus annuus L.) seedlings. The sunflower seedlings were grown in dark conditions for 9 days and then their etiolated cotyledons were harvested. Then, they were transferred into Petri dishes containing 0.001 μM, 0.1 μM, 10 μM, 1000 μM SA. Cotyledons were incubated for 14 hours in the dark at room temperature, then they were incubated in light period for 3 hours. Chlorophyll, carotenoid content, protein amount and peroxidase (POD) activity in the cotyledons was examined. SA 1000 μM solution showed the toxic effect in growth considering the results of total chlorophyll, carotenoid content and protein amount. An increasing 2 fold of chlorophyll content in 10 μM SA and 3.5 fold of carotenoid content in 0.1 μM SA treated cotyledons comparing to the control were observed. Protein amount increased in all concentrations except 1000 μM SA. POD activity was also stimulated in all concentration of SA solutions. However, the clear difference in 0.001 μM SA was not seen. As a result, chlorophyll, carotenoid, protein contents and POD activity increased in exogenic SA applications
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Claims 6
Claim · model-written summary
1000 μM salicylic acid was toxic to cotyledon growth according to pigment and protein results.
- Taxon
- sunflower
Helianthus annuuse1 - Organ / stage
- cotyledonse1
- Treatment
- SA 1000 μM solutione0
- Outcome
- growthe0
- Direction
- toxic effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA 1000 μM solution showed the toxic effect in growth considering the results of total chlorophyll, carotenoid content and protein amount.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
Claim · model-written summary
10 μM salicylic acid doubled chlorophyll content relative to control.
- Taxon
- sunflowerHelianthus annuuse1
- Organ / stage
- cotyledonse0
- Treatment
- 10 μM SAe0
- Outcome
- chlorophyll contente0
- Direction
- increasinge0
- Value
- 2 folde0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increasing 2 fold of chlorophyll content in 10 μM SA and 3.5 fold of carotenoid content in 0.1 μM SA treated cotyledons comparing to the control were observed.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
Claim · model-written summary
0.1 μM salicylic acid increased carotenoid content 3.5 fold relative to control.
- Taxon
- sunflowerHelianthus annuuse1
- Organ / stage
- cotyledonse0
- Treatment
- 0.1 μM SAe0
- Outcome
- carotenoid contente0
- Direction
- increasinge0
- Value
- 3.5 folde0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An increasing 2 fold of chlorophyll content in 10 μM SA and 3.5 fold of carotenoid content in 0.1 μM SA treated cotyledons comparing to the control were observed.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
Claim · model-written summary
Protein amount increased at all tested salicylic acid concentrations except 1000 μM.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- SAe0
- Outcome
- Protein amounte0
- Direction
- increasede0
- Qualifier
- all concentrations except 1000 μMe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Protein amount increased in all concentrations except 1000 μM SA.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
Claim · model-written summary
Salicylic acid stimulated peroxidase activity at all concentrations.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- SA solutionse0
- Outcome
- POD activitye0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity was also stimulated in all concentration of SA solutions.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
Claim · model-written summary
The difference in peroxidase activity at 0.001 μM salicylic acid was unclear.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- 0.001 μM SAe0
- Outcome
- POD activitye0
- Qualifier
- clear differencee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POD activity was also stimulated in all concentration of SA solutions. However, the clear difference in 0.001 μM SA was not seen.”
e1“cotyledons of sunflower (Helianthus annuus L.) seedlings”
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