Abstract
1 SUMMARY The experiment carried out in 2007 and 2008 in the Dryland Agriculture Research sub – Institute Sararood, Kermanshah, Iran in order to study the effects of drought stress on yield, proline content, soluble carbohydrates content, relative water content and chlorophyll content of bread wheat cultivars under field conditions. The experiments were base on split plot in a randomized complete block design with three replications. The main plots included drought stress treatments at 4 levels: I1drought stress at the start of stem elongation stage (31 Zadoks); I2 drought stress at the start of boot stage (43 Zadoks); I3drought stress at the start of grain filling stage (70 Zadoks) and I4full irrigation. The Subplots included cultivars treatments at 3 levels: Chamran (C1), Marvdasht(C2), and Shahriar (C3). A significant difference (p<0.01) was observed between the drought stress treatments. The results showed that with an increase in the Intensity of drought stress on wheat cultivars, there was a decrease in relative water content , total chlorophyll content and increased proline content, but was not observed on trend relating to soluble carbohydrates content. The Chamran cultivar (C1) on drought stress treatment (I1) had the lowest decrease in relative water content and total chlorophyll content than with control treatment (I4). Also this cultivar had the highest drought tolerance and yield stability.
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Claims 8
Claim · model-written summary
Greater drought intensity decreased relative water content.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Treatment
- Intensity of drought stresse0
- Outcome
- relative water contente0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The results showed that with an increase in the Intensity of drought stress on wheat cultivars, there was a decrease in relative water content , total chlorophyll content and increased proline content, but was not observed on trend relating to soluble carbohydrates content.”
Claim · model-written summary
Greater drought intensity decreased total chlorophyll content.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Treatment
- Intensity of drought stresse0
- Outcome
- total chlorophyll contente0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The results showed that with an increase in the Intensity of drought stress on wheat cultivars, there was a decrease in relative water content , total chlorophyll content and increased proline content, but was not observed on trend relating to soluble carbohydrates content.”
Claim · model-written summary
Greater drought intensity increased proline content.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Treatment
- Intensity of drought stresse0
- Outcome
- proline contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The results showed that with an increase in the Intensity of drought stress on wheat cultivars, there was a decrease in relative water content , total chlorophyll content and increased proline content, but was not observed on trend relating to soluble carbohydrates content.”
Claim · model-written summary
Soluble carbohydrate content showed no consistent trend with drought intensity.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Treatment
- Intensity of drought stresse0
- Outcome
- soluble carbohydrates contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The results showed that with an increase in the Intensity of drought stress on wheat cultivars, there was a decrease in relative water content , total chlorophyll content and increased proline content, but was not observed on trend relating to soluble carbohydrates content.”
Claim · model-written summary
Chamran under I1 had the smallest relative water content decline relative to I4.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Material
- Chamrane0
- Treatment
- drought stress treatment (I1)e0
- Outcome
- relative water contente0
- Direction
- lowest decreasee0
- Comparator
- control treatment (I4)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The Chamran cultivar (C1) on drought stress treatment (I1) had the lowest decrease in relative water content and total chlorophyll content than with control treatment (I4).”
Claim · model-written summary
Chamran under I1 had the smallest chlorophyll decline relative to I4.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Material
- Chamrane0
- Treatment
- drought stress treatment (I1)e0
- Outcome
- total chlorophyll contente0
- Direction
- lowest decreasee0
- Comparator
- control treatment (I4)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“The Chamran cultivar (C1) on drought stress treatment (I1) had the lowest decrease in relative water content and total chlorophyll content than with control treatment (I4).”
Claim · model-written summary
Chamran had the highest drought tolerance.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Material
- Chamrane1
- Outcome
- drought tolerancee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“Also this cultivar had the highest drought tolerance and yield stability.”
e1“The Chamran cultivar (C1) on drought stress treatment (I1)”
Claim · model-written summary
Chamran had the highest yield stability.
- Taxon
- BREAD WHEAT
Triticum aestivumt0 - Material
- Chamrane1
- Outcome
- yield stabilitye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“BREAD WHEAT”
e0“Also this cultivar had the highest drought tolerance and yield stability.”
e1“The Chamran cultivar (C1) on drought stress treatment (I1)”