Abstract
Sensitivity of wheat (Triticum aestivum L.) seedlings to salt stress was investigated as dependent on light conditions of plant growing. In two-week-old seedlings grown on salt-free medium, aboveground organs were detached from the roots and subjected to a brief stress at different concentrations of NaCl. The extent of salt stress effect expressed as a decrease in the rate of the photosynthetic release of oxygen and the relative content of water and chlorophyll in the leaves greatly depended on light conditions of growing. The plants grown at low light intensity were notable for a greater sensitivity to NaCl in the medium. Plant responses to salt stress were different at low and high salt concentrations. At low NaCl concentrations (0.05–0.10 M) in the solution, in plants grown at low light intensity, the rate of photosynthesis calculated per unit of chlorophyll increased. This effect was not observed in plants grown at the higher light intensity. At high NaCl concentrations (0.2–0.4 M) in the medium, the rate of photosynthesis rapidly decreased in all the types of treatment, with the effect being most pronounced in plants grown at low light intensity. The obtained results suggest a narrow range of NaCl concentrations with an optimum at 0.1 M positively affecting the wheat seedlings physiological state upon salt stress development depending on light conditions of plant growing.
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Claims 6
Claim · model-written summary
Salt stress decreased oxygen release, leaf water, and chlorophyll, with the extent depending strongly on growth light.
- Taxon
- wheat (Triticum aestivum L.)
Triticum aestivume1 - Treatment
- salt stresse0
- Outcome
- rate of the photosynthetic release of oxygen and the relative content of water and chlorophyll in the leavese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The extent of salt stress effect expressed as a decrease in the rate of the photosynthetic release of oxygen and the relative content of water and chlorophyll in the leaves greatly depended on light conditions of growing”
e1“wheat (Triticum aestivum L.) seedlings”
Claim · model-written summary
Low-light-grown plants were more sensitive to NaCl than plants grown at higher light.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivume2
- Outcome
- sensitivity to NaCle0
- Direction
- greatere0
- Comparator
- higher light intensitye1
- Setting
- low light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants grown at low light intensity were notable for a greater sensitivity to NaCl in the medium”
e1“This effect was not observed in plants grown at the higher light intensity”
e2“wheat (Triticum aestivum L.) seedlings”
Claim · model-written summary
At 0.05–0.10 M NaCl, chlorophyll-normalized photosynthesis increased in low-light-grown plants.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivume1
- Treatment
- low NaCl concentrations (0.05–0.10 M)e0
- Outcome
- rate of photosynthesis calculated per unit of chlorophylle0
- Direction
- increasede0
- Setting
- low light intensitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At low NaCl concentrations (0.05–0.10 M) in the solution, in plants grown at low light intensity, the rate of photosynthesis calculated per unit of chlorophyll increased”
e1“wheat (Triticum aestivum L.) seedlings”
Claim · model-written summary
The low-salt increase in photosynthesis was absent in higher-light-grown plants.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivume2
- Outcome
- rate of photosynthesis calculated per unit of chlorophyll increasede1
- Direction
- not observede0
- Setting
- higher light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This effect was not observed in plants grown at the higher light intensity”
e1“At low NaCl concentrations (0.05–0.10 M) in the solution, in plants grown at low light intensity, the rate of photosynthesis calculated per unit of chlorophyll increased”
e2“wheat (Triticum aestivum L.) seedlings”
Claim · model-written summary
At 0.2–0.4 M NaCl, photosynthesis rapidly decreased in all treatments, most strongly after low-light growth.
- Taxon
- wheat (Triticum aestivum L.)Triticum aestivume1
- Treatment
- high NaCl concentrations (0.2–0.4 M)e0
- Outcome
- rate of photosynthesise0
- Direction
- rapidly decreasede0
- Qualifier
- most pronounced in plants grown at low light intensitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At high NaCl concentrations (0.2–0.4 M) in the medium, the rate of photosynthesis rapidly decreased in all the types of treatment, with the effect being most pronounced in plants grown at low light intensity”
e1“wheat (Triticum aestivum L.) seedlings”
Claim · model-written summary
The authors infer that NaCl near 0.1 M can benefit wheat seedling physiological state during salt stress, depending on growth light.
- Taxon
- wheatTriticum aestivume0
- Treatment
- NaCl concentrations with an optimum at 0.1 Me0
- Outcome
- wheat seedlings physiological statee0
- Direction
- positively affectinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a narrow range of NaCl concentrations with an optimum at 0.1 M positively affecting the wheat seedlings physiological state upon salt stress development depending on light conditions of plant growing”
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