Abstract
Drought stress encumbers the growth of turfgrass principally by disrupting the plant-water relations and physiological functions. The present study was carried out to appraise the role of silicon (Si) in improving the drought tolerance in Kentucky bluegrass (Poa pratensis L.). Drought stress and four levels (0, 200, 400, and 800 mg L(-1)) of Si (Na2SiO3·9H2O) were imposed after 2 months old plants cultured under glasshouse conditions. Drought stress was found to decrease the photosynthesis, transpiration rate, stomatal conductance, leaf water content, relative growth rate, water use efficiency, and turf quality, but to increase in the root/shoot and leaf carbon/nitrogen ratio. Such physiological interferences, disturbances in plant water relations, and visually noticeable growth reductions in Kentucky bluegrass were significantly alleviated by the addition of Si after drought stress. For example, Si application at 400 mg L(-1) significantly increased the net photosynthesis by 44%, leaf water contents by 33%, leaf green color by 42%, and turf quality by 44% after 20 days of drought stress. Si application proved beneficial in improving the performance of Kentucky bluegrass in the present study suggesting that manipulation of endogenous Si through genetic or biotechnological means may result in the development of drought resistance in grasses.
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Claims 10
Claim · model-written summary
Drought reduced photosynthesis, transpiration and stomatal conductance.
- Taxon
- Kentucky Bluegrass
.jpg?width=60)
Poa pratensist0 - Treatment
- Drought stresse0
- Outcome
- photosynthesis, transpiration rate, stomatal conductancee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Drought stress was found to decrease the photosynthesis, transpiration rate, stomatal conductance”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
Drought reduced leaf water content, growth rate and water-use efficiency.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Drought stresse1
- Outcome
- leaf water content, relative growth rate, water use efficiencye0
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf water content, relative growth rate, water use efficiency”
e1“Drought stress was found to decrease the photosynthesis, transpiration rate, stomatal conductance, leaf water content, relative growth rate, water use efficiency”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
Drought reduced turf quality.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Drought stresse0
- Outcome
- turf qualitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought stress was found to decrease the photosynthesis, transpiration rate, stomatal conductance, leaf water content, relative growth rate, water use efficiency, and turf quality”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
Drought increased root/shoot and leaf carbon/nitrogen ratios.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Droughtt0
- Outcome
- root/shoot and leaf carbon/nitrogen ratioe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in the root/shoot and leaf carbon/nitrogen ratio”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
Silicon significantly alleviated drought-related physiology, water-relation and growth losses.
- Taxon
- Kentucky bluegrassPoa pratensise0
- Treatment
- addition of Sie0
- Outcome
- physiological interferences, disturbances in plant water relations, and visually noticeable growth reductionse0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such physiological interferences, disturbances in plant water relations, and visually noticeable growth reductions in Kentucky bluegrass were significantly alleviated by the addition of Si after drought stress”
Claim · model-written summary
At 400 mg L(-1), silicon increased net photosynthesis 44% after 20 days drought.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Si application at 400 mg L(-1)e0
- Outcome
- net photosynthesise0
- Direction
- increasede0
- Value
- 44%e0
- Qualifier
- after 20 days of drought stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application at 400 mg L(-1) significantly increased the net photosynthesis by 44%, leaf water contents by 33%, leaf green color by 42%, and turf quality by 44% after 20 days of drought stress”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
At 400 mg L(-1), silicon increased leaf water content 33% after 20 days drought.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Si application at 400 mg L(-1)e0
- Outcome
- leaf water contentse0
- Direction
- increasede0
- Value
- 33%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application at 400 mg L(-1) significantly increased the net photosynthesis by 44%, leaf water contents by 33%, leaf green color by 42%, and turf quality by 44% after 20 days of drought stress”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
At 400 mg L(-1), silicon increased leaf green color 42% after 20 days drought.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Si application at 400 mg L(-1)e0
- Outcome
- leaf green colore0
- Direction
- increasede0
- Value
- 42%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application at 400 mg L(-1) significantly increased the net photosynthesis by 44%, leaf water contents by 33%, leaf green color by 42%, and turf quality by 44% after 20 days of drought stress”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
At 400 mg L(-1), silicon increased turf quality 44% after 20 days drought.
- Taxon
- Kentucky BluegrassPoa pratensist0
- Treatment
- Si application at 400 mg L(-1)e0
- Outcome
- turf qualitye0
- Direction
- increasede0
- Value
- 44%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Si application at 400 mg L(-1) significantly increased the net photosynthesis by 44%, leaf water contents by 33%, leaf green color by 42%, and turf quality by 44% after 20 days of drought stress”
t0“Drought Tolerance of Kentucky Bluegrass”
Claim · model-written summary
The authors suggested increasing endogenous silicon genetically or biotechnologically for drought resistance.
Verbatim
e0“manipulation of endogenous Si through genetic or biotechnological means may result in the development of drought resistance in grasses”
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