Abstract
In order to determine, source of grain yield limitation under different enviromental conditions, as well as indentifying the rate of restrication caused by terminal heat stress on development and growth of wheat, this research was conducted with twenty wheat genotypes using Randomized Complete Block Design (RCBD) with three replications, in two separate experiments in two years(1998-2000). The experiments were sown in late of december and january to stimulate favoarable and unfavourable conditions, respectively. Five to seven days after anthesis flag leaf and spikelets from one side of spike were removed to stimulate, sink and source limitation respectively. Aftert harvest, source and sink restrication percentage were calculated according to the mean of remaining grains in treated spike and control (without removal of flag leaf and spikelets). Results indicated that all genotypes had not sink restrication and the contribution of flag leaf to grain dry weight was 12%. However, some genotypes showed source restrication. This restrication was estimated from 0 to 34% (mean: 12.6%) and 5.7 – 41.2% (mean:17.2%) for favourable and unfavourable conditions, respectively. Therfore, source restrication caused by exposure to terminal heat stress was greater by 6%. Likewise, results indicated that source restrication was higher in genotypes with large grain size. Grain weight had not significant effect in the determination of final yield. Reduction in grain yield must be sought in other yield components, such as grain number per spike and spikes number per sqaure meter. Key word: Restrication, Unfavourable condition, Favourable conditions, Source, Sink, Terminal heat stress. Study of salinity effect on growth and accumulation ions in promissing wheat (Triticum aestivum ) genotypes A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes. Further field experiments are necessary for confirmation and application of the result.In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes. Further field experiments are necessary for confirmation and application of the result.
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Claims 14
Claim · model-written summary
Source restrication under favourable conditions was estimated at 0 to 34% (mean 12.6%) across wheat genotypes.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- favourablee1
- Outcome
- source restricatione1
- Value
- 0 to 34% (mean: 12.6%)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e1“However, some genotypes showed source restrication. This restrication was estimated from 0 to 34% (mean: 12.6%) and 5.7 – 41.2% (mean:17.2%) for favourable and unfavourable conditions, respectively”
Claim · model-written summary
Source restrication under unfavourable conditions was estimated at 5.7 to 41.2% (mean 17.2%) across wheat genotypes.
- Taxon
- wheatTriticum aestivume0
- Treatment
- unfavourablee1
- Outcome
- source restricatione1
- Value
- 5.7 – 41.2% (mean:17.2%)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e1“However, some genotypes showed source restrication. This restrication was estimated from 0 to 34% (mean: 12.6%) and 5.7 – 41.2% (mean:17.2%) for favourable and unfavourable conditions, respectively”
Claim · model-written summary
Source restrication was higher in wheat genotypes with large grain size.
- Taxon
- wheatTriticum aestivume0
- Material
- genotypes with large grain sizee3
- Outcome
- source restricatione3
- Direction
- highere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e3“Likewise, results indicated that source restrication was higher in genotypes with large grain size”
Claim · model-written summary
Source restrication caused by exposure to terminal heat stress was greater by 6%.
- Taxon
- wheatTriticum aestivume0
- Treatment
- terminal heat stresse4
- Outcome
- source restricatione4
- Direction
- greatere4
- Value
- 6%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e4“Therfore, source restrication caused by exposure to terminal heat stress was greater by 6%”
Claim · model-written summary
No genotype showed sink restrication after removal of spikelets.
- Taxon
- wheatTriticum aestivume0
- Material
- all genotypese5
- Outcome
- sink restricatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e5“Results indicated that all genotypes had not sink restrication and the contribution of flag leaf to grain dry weight was 12%”
Claim · model-written summary
The flag leaf contributed 12% to grain dry weight.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- flag leafe5
- Outcome
- contribution of flag leaf to grain dry weighte5
- Value
- 12%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e5“Results indicated that all genotypes had not sink restrication and the contribution of flag leaf to grain dry weight was 12%”
Claim · model-written summary
Grain weight had no significant effect on final yield in wheat.
- Taxon
- wheatTriticum aestivume0
- Outcome
- final yielde6
- Qualifier
- Grain weight had not significant effecte6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this research was conducted with twenty wheat genotypes”
e6“Grain weight had not significant effect in the determination of final yield”
Claim · model-written summary
Pgo/Seri and Opata/Bow showed less reduction in growth under salinity than the other wheat genotypes.
- Taxon
- wheatTriticum aestivume7
- Material
- Pgo/Seri and Opata/Bowe7
- Treatment
- salinitye7
- Outcome
- reduction in growthe7
- Direction
- lesse7
- Comparator
- the other genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Pgo/Seri inhibited high Na accumulation in shoots under salinity.
- Taxon
- wheatTriticum aestivume7
- Material
- Pgo/Serie7
- Treatment
- salinitye7
- Outcome
- Na accumulation in shootse7
- Direction
- inhibitede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Pgo/Seri absorbed less Cl under salinity.
- Taxon
- wheatTriticum aestivume7
- Material
- Pgo/Serie7
- Treatment
- salinitye7
- Outcome
- Cle7
- Direction
- absorbed lesse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Opata/Bow accumulated high Na and Cl in shoots and roots.
- Taxon
- wheatTriticum aestivume7
- Material
- Opata/Bowe7
- Organ / stage
- shoots and rootse7
- Outcome
- Na and Cle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Tajan, Zagros and Rayon accumulated high Na and Cl, which increased the toxic effect of the ions.
- Taxon
- wheatTriticum aestivume7
- Material
- Tajan, Zagros and Rayone7
- Outcome
- Na and Cle7
- Qualifier
- increased toxic effect of the ionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Opata/Bow had higher salt tolerance than the other wheat genotypes despite high Na and Cl accumulation.
- Taxon
- wheatTriticum aestivume7
- Material
- Opata/Bowe7
- Treatment
- salinitye7
- Outcome
- salt tolerancee7
- Direction
- highere7
- Qualifier
- in spite of high Na and Cl accumulatione7
- Comparator
- the other genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
Claim · model-written summary
Opata/Bow probably compartmented toxic ions in the vacuole or apoplast, giving better osmotic adjustment.
- Taxon
- wheatTriticum aestivume7
- Material
- Opata/Bowe7
- Outcome
- osmotic adjustmente7
- Qualifier
- compartmented these toxic ions in the vacuole or apoplaste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“A. Abdolzadeh and N. Saffarie ABSTRACT In order to evaluate the tolerance level and identification of tolerance mechanism to salinity, response of five genotypes of wheat (Zagros, Tajan, Opata/Bow, Pgo/Seri and Rayon ) to six salt treatments including 0, 25, 50, 75, 100 and 150 mM NaCl was studied in hydroponic culture in growth chamber under control condition. Pgo/Seri and Opata/Bow in comparison to the other genotypes, showed less reduction in growth under salinity. Pgo/Seri inhibited high Na accumulation in shoots and absorbed less Cl. Opata/Bow accumulated high Na and Cl in shoots and roots which probably were compartmented these toxic ions in the vacuole or apoplast to result a better osmotic adjustment and less toxicity of the ions. Tajan, Zagros and Rayon also accumulated high level of Na and Cl that increased toxic effect of the ions. Results also indicated that Opata/Bow, in spite of high Na and Cl accumulation, had higher salt tolerance in comparison to the other genotypes.”
The same questions in other papers
salinity · nutrient: content · Triticum aestivum (wheat)Positive and negative results
18 papers in the same direction as this paper · 65 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
81 papers more in this group
See all 85 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.