Abstract
With a view to understanding the traits which can be used as a quick criteria for drought tolerance, field and laboratory experiments were used to evaluate nine wheat (Triticum aestivum L.) genotypes; seven local varieties with two introduced genotypes from International Center for Agricultural Research in the Dry Areas (ICARDA). The field experiment was grown under two water regimes (stress and non stress treatments). The stress treatment induced by withholding irrigation after emergence and giving two supplementary irrigations, one after 60 days post-sowing and the other after 90 days post-sowing and non stress (well-watered). Combined analysis of variance over two seasons showed highly significant differences among wheat genotypes in all the studied traits and water stress decreased them significantly. The superior genotypes 1,2 and 6 which gave higher relative water content (RWC) accumulated more free proline (Pro) and had lower drought susceptibility index (S) values, whereas genotypes 3, 4 and 9 had the lowest RWC, Pro accumulation and had the highest S values. Indicating that accumulated Pro acts as a compatible solute regulating and reducing water loss from the cell during episodes of water deficit. High RWC and Pro over-accumulation were recognized as beneficial drought tolerance indicators and may be used as selection criteria in wheat breeding program. Effects of drought stress in laboratory experiment were induced by polyethylene glycol (PEG) (0, 15 and 25%, with three replicates) and applied on germination of wheat genotypes seeds. The PEG induced a drop in the shoot, root biomass and coleoptiles length which was the greatest in genotypes 3, 4 and 9, while the decrease in genotypes 1, 2 and 6 was little under the various levels from PEG. The variability of leafproteins was analyzed by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). It is concluded that leaf protein profiles could be useful marker in the studies of genetic variation and classification of adapted cultivars under control and stress conditions.
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Claims 13
Claim · model-written summary
Wheat genotypes differed significantly across measured traits.
- Taxon
- wheat
Triticum aestivume0 - Material
- wheat genotypese0
- Outcome
- all the studied traitse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highly significant differences among wheat genotypes in all the studied traits”
Claim · model-written summary
Water stress significantly decreased measured traits.
- Taxon
- wheatTriticum aestivume1
- Treatment
- water stresse0
- Outcome
- theme0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water stress decreased them significantly”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Genotypes 1, 2 and 6 had higher relative water content.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 1,2 and 6e0
- Outcome
- relative water contente0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 1,2 and 6 which gave higher relative water content (RWC)”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
These genotypes accumulated more free proline.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 1,2 and 6e0
- Outcome
- free prolinee0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 1,2 and 6 which gave higher relative water content (RWC) accumulated more free proline (Pro)”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
These genotypes had lower drought susceptibility index.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 1,2 and 6e0
- Outcome
- drought susceptibility indexe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 1,2 and 6 which gave higher relative water content (RWC) accumulated more free proline (Pro) and had lower drought susceptibility index (S) values”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Genotypes 3, 4 and 9 had the lowest RWC and proline accumulation.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 3, 4 and 9e0
- Outcome
- RWC, Pro accumulatione0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 3, 4 and 9 had the lowest RWC, Pro accumulation”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Genotypes 3, 4 and 9 had the highest susceptibility index.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 3, 4 and 9e0
- Outcome
- S valuese0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypes 3, 4 and 9 had the lowest RWC, Pro accumulation and had the highest S values”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
The authors interpret proline accumulation as reducing water loss.
- Taxon
- wheatTriticum aestivume1
- Compound
- Proe0
- Outcome
- water loss from the celle0
- Direction
- reducinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“accumulated Pro acts as a compatible solute regulating and reducing water loss from the cell during episodes of water deficit”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
High RWC and proline were recommended as selection criteria.
- Taxon
- wheatTriticum aestivume0
- Outcome
- selection criteria in wheat breeding programe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High RWC and Pro over-accumulation were recognized as beneficial drought tolerance indicators and may be used as selection criteria in wheat breeding program”
Claim · model-written summary
PEG reduced shoot and root biomass and coleoptile length.
- Taxon
- wheatTriticum aestivume1
- Treatment
- PEGe0
- Outcome
- shoot, root biomass and coleoptiles lengthe0
- Direction
- drope0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PEG induced a drop in the shoot, root biomass and coleoptiles length”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
The decline was greatest in genotypes 3, 4 and 9.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 3, 4 and 9e0
- Outcome
- greateste0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which was the greatest in genotypes 3, 4 and 9”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
The decline was small in genotypes 1, 2 and 6.
- Taxon
- wheatTriticum aestivume1
- Material
- genotypes 1, 2 and 6e0
- Outcome
- decreasee0
- Direction
- littlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in genotypes 1, 2 and 6 was little under the various levels from PEG”
e1“wheat (Triticum aestivum L.)”
Claim · model-written summary
Leaf protein profiles may classify adapted cultivars.
- Taxon
- wheatTriticum aestivume1
- Outcome
- classification of adapted cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf protein profiles could be useful marker in the studies of genetic variation and classification of adapted cultivars under control and stress conditions”
e1“wheat (Triticum aestivum L.)”
The same questions in other papers
poly(ethylene glycol) · growth · Triticum aestivum (wheat)Positive and negative results
16 papers in the same direction as this paper · 6 in the opposite direction
- negative
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19 papers more in this group
See all 23 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.