Abstract
The effect of drought and salt stresses on the water soluble carbohydrate content in wheat ( Triticum aestivum L.) seedlings was examined to characterize the involvement of major sugar components in the adaptive processes. Hydroponically grown seedlings of four wheat varieties differing in drought and salt tolerance were exposed to consecutive water (polyethylene glycol, PEG) and salinity (NaCl) stresses. Total water‐soluble carbohydrate (WSC), glucose, fructose, sucrose, and fructan content of stems (non‐photosynthetic tissue) were determined. Tolerant genotypes accumulated more soluble carbohydrate than did sensitive ones. Both ionic and non‐ionic stresses increased the concentration of reducing sugars, sucrose, and fructans. Drought tolerant varieties accumulated sucrose to a significantly greater level than did sensitive ones under non‐ionic stress condition. Changes in fructan content of plants after transfer from PEG to NaCl containing solutions were genotype dependent, increasing in salt tolerant and decreasing in salt sensitive cultivars. These results indicate that WSC might be a useful marker for selecting genotypes that are more drought or salt tolerant. The type of sugar comprising the increase in WSC appears to be a less reliable marker since the initial response was an increase in monosaccharides and the delayed response was an increase in fructan.
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Claims 9
Claim · model-written summary
Tolerant genotypes accumulated more soluble carbohydrate.
- Taxon
- Wheat
Triticum aestivumt0 - Material
- Tolerant genotypese0
- Outcome
- soluble carbohydratee0
- Direction
- moree0
- Comparator
- sensitive onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tolerant genotypes accumulated more soluble carbohydrate than did sensitive ones”
t0“Wheat”
Claim · model-written summary
Ionic and nonionic stresses increased reducing sugars, sucrose and fructans.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- ionic and non‐ionic stressese0
- Outcome
- concentration of reducing sugars, sucrose, and fructanse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both ionic and non‐ionic stresses increased the concentration of reducing sugars, sucrose, and fructans”
t0“Wheat”
Claim · model-written summary
Drought-tolerant varieties accumulated more sucrose under nonionic stress.
- Taxon
- WheatTriticum aestivumt0
- Material
- Drought tolerant varietiese0
- Outcome
- sucrosee0
- Direction
- greatere0
- Qualifier
- under non‐ionic stress conditione0
- Comparator
- sensitive onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought tolerant varieties accumulated sucrose to a significantly greater level than did sensitive ones under non‐ionic stress condition”
t0“Wheat”
Claim · model-written summary
Fructan increased in salt-tolerant varieties after transfer to NaCl.
- Taxon
- WheatTriticum aestivumt0
- Material
- salt tolerante0
- Treatment
- transfer from PEG to NaCl containing solutionse0
- Outcome
- fructan contente0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in fructan content of plants after transfer from PEG to NaCl containing solutions were genotype dependent, increasing in salt tolerant and decreasing in salt sensitive cultivars”
t0“Wheat”
Claim · model-written summary
Fructan decreased in salt-sensitive cultivars after transfer to NaCl.
- Taxon
- WheatTriticum aestivumt0
- Material
- salt sensitive cultivarse0
- Treatment
- transfer from PEG to NaCl containing solutionse0
- Outcome
- fructan contente0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in fructan content of plants after transfer from PEG to NaCl containing solutions were genotype dependent, increasing in salt tolerant and decreasing in salt sensitive cultivars”
t0“Wheat”
Claim · model-written summary
Water soluble carbohydrates may mark drought or salt tolerance.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- useful marker for selecting genotypes that are more drought or salt tolerante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WSC might be a useful marker for selecting genotypes that are more drought or salt tolerant”
t0“Wheat”
Claim · model-written summary
Sugar type was a less reliable marker.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- less reliable markere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The type of sugar comprising the increase in WSC appears to be a less reliable marker”
t0“Wheat”
Claim · model-written summary
Initial response increased monosaccharides.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- monosaccharidese0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the initial response was an increase in monosaccharides”
t0“Wheat”
Claim · model-written summary
Delayed response increased fructan.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- fructane0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the delayed response was an increase in fructan”
t0“Wheat”
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