Abstract
Ameliorative effect of exogenously applied glycinebetaine (GB) on photosynthetic capacity of two wheat cultivars differing in salt tolerance grown under salt stress was assessed. Plants were grown under field conditions at 2.84, 15 dS/m in split-split plot design. Different levels of GB (no spray NS, 0.1% Tween 20 solution, 50 and 100 mM GB in 0.1% Tween 20 solution) were exogenously applied as a foliar spray to salt tolerant (S-24) and moderately salt sensitive (MH-97) wheat cultivars under saline and non-saline conditions. Salt stress reduced the photosynthetic capacity of both cultivars. Reduction in photosynthetic rate was primarily due to stomatal limitations. Cultivar S-24 excelled MH-97 under salt stress with respect to photosynthetic rate and leaf turgor potential. Salt-induced reduction in photosynthetic capacity was ameliorated by exogenous application of GB. High accumulation of GB mainly contributes to OA, which is one of the factors for improving photosynthetic capacity under salt stress. Better osmotic adjustment or plant water status due to GB application increased the stomatal conductance and thus favored higher CO2 fixation rate. The protective effect of GB on photosynthetic pigments and GB induced reduction in transpiration rate are additional factors which might have contributed to better growth of wheat cultivars under salt stress. However, cv. S-24 was higher in photosynthetic capacity and plant water status or osmotic adjustment than MH-97, which could explain the ability of the salt tolerant S-24 to show higher salt tolerance than the moderately sensitive MH-97.
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Claims 12
Claim · model-written summary
Salt stress reduced photosynthetic capacity of both wheat cultivars.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Salt stresse0
- Outcome
- photosynthetic capacitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Salt stress reduced the photosynthetic capacity of both cultivars.”
Claim · model-written summary
Photosynthetic rate reduction was primarily attributed to stomatal limitations.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Reduction in photosynthetic ratee0
- Qualifier
- stomatal limitationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Reduction in photosynthetic rate was primarily due to stomatal limitations.”
Claim · model-written summary
S-24 had higher photosynthetic rate than MH-97 under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- S-24e0
- Outcome
- photosynthetic ratee0
- Direction
- excellede0
- Qualifier
- under salt stresse0
- Comparator
- MH-97e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Cultivar S-24 excelled MH-97 under salt stress with respect to photosynthetic rate and leaf turgor potential.”
Claim · model-written summary
S-24 had greater leaf turgor potential than MH-97 under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Material
- S-24e0
- Outcome
- leaf turgor potentiale0
- Direction
- excellede0
- Qualifier
- under salt stresse0
- Comparator
- MH-97e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Cultivar S-24 excelled MH-97 under salt stress with respect to photosynthetic rate and leaf turgor potential.”
Claim · model-written summary
Exogenous GB ameliorated salt-induced reduction in photosynthetic capacity.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- exogenous application of GBe0
- Outcome
- photosynthetic capacitye0
- Direction
- amelioratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Salt-induced reduction in photosynthetic capacity was ameliorated by exogenous application of GB.”
Claim · model-written summary
GB accumulation mainly contributes to osmotic adjustment.
- Taxon
- wheatTriticum aestivumt0
- Compound
- GBe0
- Outcome
- OAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“High accumulation of GB mainly contributes to OA, which is one of the factors for improving photosynthetic capacity under salt stress.”
Claim · model-written summary
Osmotic adjustment from GB contributed to improved photosynthetic capacity under salt stress.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- GBe0
- Outcome
- photosynthetic capacitye0
- Qualifier
- OAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“High accumulation of GB mainly contributes to OA, which is one of the factors for improving photosynthetic capacity under salt stress.”
Claim · model-written summary
GB application increased stomatal conductance through improved osmotic adjustment or water status.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- GB applicatione0
- Outcome
- stomatal conductancee0
- Qualifier
- Better osmotic adjustment or plant water statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“Better osmotic adjustment or plant water status due to GB application increased the stomatal conductance and thus favored higher CO2 fixation rate.”
Claim · model-written summary
Greater stomatal conductance favored higher CO2 fixation rate.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- CO2 fixation ratee0
- Qualifier
- stomatal conductancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“increased the stomatal conductance and thus favored higher CO2 fixation rate.”
Claim · model-written summary
GB protection of photosynthetic pigments might contribute to better growth under salt stress.
- Taxon
- wheatTriticum aestivume0
- Treatment
- GBe0
- Outcome
- better growthe0
- Qualifier
- protective effect of GB on photosynthetic pigmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The protective effect of GB on photosynthetic pigments and GB induced reduction in transpiration rate are additional factors which might have contributed to better growth of wheat cultivars under salt stress.”
Claim · model-written summary
GB induced reduction in transpiration might contribute to better growth under salt stress.
- Taxon
- wheatTriticum aestivume0
- Treatment
- GBe0
- Outcome
- better growthe0
- Qualifier
- GB induced reduction in transpiration ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The protective effect of GB on photosynthetic pigments and GB induced reduction in transpiration rate are additional factors which might have contributed to better growth of wheat cultivars under salt stress.”
Claim · model-written summary
S-24 had higher photosynthetic capacity and plant water status or osmotic adjustment than MH-97.
- Taxon
- wheatTriticum aestivumt0
- Material
- S-24e0
- Outcome
- photosynthetic capacity and plant water status or osmotic adjustmente0
- Direction
- highere0
- Comparator
- MH-97e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wheat cultivars”
e0“cv. S-24 was higher in photosynthetic capacity and plant water status or osmotic adjustment than MH-97”
The same questions in other papers
glycine betaine · physiology: photosynthesis · Triticum aestivum (wheat)Results agree
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88 papers in the same direction as this paper · 11 in the opposite direction
- negative
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See all 100 papers →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.