Abstract
Salinity is one of the most important limiting factors in plant growth. It is also a predominant constraint that impairs grass growth and quality. Plant hormones play important roles in the capability of plants to adapt to environmental stresses. Hence, the impact of two plant growth regulators (PGRs) i.e. salicylic acid (SA) and progesterone (P4) was studied on biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt. The experimental treatments were composed of salinity at four levels (0, 2, 4, and 6 dS m-1) and six levels of PGRs (control, 1 mg L-1 P4,10 mg L-1 P4, 1 mM SA, 3 mM SA, and 1 mg L-1 P4 + 1 mM SA). The results showed that leaf firing percentage was increased with the excess in salinity, but the use of SA and P4 eased the effects of salinity stress and reduced leaf firing under salinity. 6 dS m-1 and 3 mM SA salinity caused to the maximum electrolyte leakage. The highest relative water content was observed in 4 dS m-1 salinity and 1 mM SA treatment. The highest glycine betaine was related to 6 dS m-1 NaCl and no hormone application. Salinity increased total protein and catalase, and the simultaneous use of P4 and SA exhibited the highest total protein and catalase content, whilst the control plants showed the lowest ones. The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance and increased pigments and antioxidant enzyme activities.
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Claims 11
Claim · model-written summary
Leaf firing percentage increased with increasing salinity in Poa pratensis.
- Taxon
- Poa pratensis
.jpg?width=60)
Poa pratensise0 - Treatment
- excess in salinitye1
- Outcome
- leaf firing percentagee1
- Direction
- increasede1
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e1“leaf firing percentage was increased with the excess in salinity”
Claim · model-written summary
Salicylic acid and progesterone reduced leaf firing under salinity.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- SA and P4e2
- Outcome
- leaf firinge2
- Direction
- reducede2
- Qualifier
- under salinitye2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e2“the use of SA and P4 eased the effects of salinity stress and reduced leaf firing under salinity”
Claim · model-written summary
The 6 dS m-1 salinity with 3 mM SA caused the maximum electrolyte leakage.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- 6 dS m-1 and 3 mM SA salinitye3
- Outcome
- electrolyte leakagee3
- Direction
- maximume3
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e3“6 dS m-1 and 3 mM SA salinity caused to the maximum electrolyte leakage”
Claim · model-written summary
The highest relative water content was observed under 4 dS m-1 salinity with 1 mM SA.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- 4 dS m-1 salinity and 1 mM SA treatmente4
- Outcome
- relative water contente4
- Direction
- higheste4
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e4“The highest relative water content was observed in 4 dS m-1 salinity and 1 mM SA treatment”
Claim · model-written summary
The highest glycine betaine was related to 6 dS m-1 NaCl and no hormone application.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- 6 dS m-1 NaCle5
- Outcome
- glycine betainee5
- Direction
- higheste5
- Comparator
- no hormone applicatione5
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e5“The highest glycine betaine was related to 6 dS m-1 NaCl and no hormone application”
Claim · model-written summary
Salinity increased total protein and catalase in Poa pratensis.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- Salinitye6
- Outcome
- total protein and catalasee6
- Direction
- increasede6
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e6“Salinity increased total protein and catalase, and the simultaneous use of P4 and SA exhibited the highest total protein and catalase content, whilst the control plants showed the lowest ones”
Claim · model-written summary
Simultaneous use of P4 and SA gave the highest total protein and catalase content, whereas control plants had the lowest.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- simultaneous use of P4 and SAe6
- Outcome
- total protein and catalase contente6
- Direction
- higheste6
- Comparator
- control plantse6
- Setting
- greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e6“Salinity increased total protein and catalase, and the simultaneous use of P4 and SA exhibited the highest total protein and catalase content, whilst the control plants showed the lowest ones”
Claim · model-written summary
Salinity stress reduced chlorophyll content in Poa pratensis.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- salinity stresse7
- Outcome
- chlorophyll contente7
- Direction
- reducede7
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e7“The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance”
Claim · model-written summary
SA and P4 increased chlorophyll content under salinity stress.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- SA and P4e7
- Outcome
- chlorophyll contente7
- Direction
- increasede7
- Qualifier
- under salinity stresse7
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e7“The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance”
Claim · model-written summary
The two growth regulators improved carotenoid content under salinity stress.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- two growth regulatorse7
- Outcome
- carotenoid contente7
- Direction
- improvede7
- Qualifier
- under salinity stresse7
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e7“The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance”
Claim · model-written summary
SA and P4 improved salinity tolerance of Poa pratensis.
- Taxon
- Poa pratensisPoa pratensise0
- Treatment
- SA and P4e7
- Outcome
- salinity tolerancee7
- Direction
- improvede7
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological characteristics of Poa pratensis in saline conditions in a greenhouse experimnt”
e7“The application of salinity stress reduced chlorophyll content, but SA and P4 increased it. The application of the two growth regulators improved carotenoid content under salinity stress. Overall, the results showed that the application of SA and P4 improved salinity tolerance”
The same questions in other papers
salicylic acid · physiology: oxidative · Poa pratensis (Kentucky bluegrass)Positive and negative results
1 in the opposite direction
- positive
salinity · physiology: pigments · Poa pratensis (Kentucky bluegrass)Results agree
1 paper in the same direction as this paper
- negative
class · physiology: pigments · Poa pratensis (Kentucky bluegrass)Results agree
1 paper in the same direction as this paper
- positive
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.