Abstract
Abstract Recent observations of grazing‐induced Fe‐deficiency chlorosis in wheat ( Triticum aestivum L.) grown on calcareous soil indicates that Fe deficiency should be considered one of the factors associated with decreased grain yield in grazed wheat. Quantity of phytosiderophore release by roots of Fe‐deficient grasses has been closely linked to resistance to Fe‐deficiency chlorosis in numerous species and could potentially explain these observations. Phytosiderophore release following clipping was determined for two wheat cultivars (‘Abilene’ and ‘2157’) widely divergent in field chlorosis resistance. Plants were grown hydroponically in a complete nutrient solution containing 0.2 mg L −1 Fe as Fe‐HEDTA ( N ‐hydroxyethylethylenediaminetriacetic acid). Phytosiderophore release was measured using an Fe‐binding assay under nonaxenic conditions. Abilene and 2157 wheat responded differently to clipping of foliage. Initial response in both was reduced release of phytosiderophore, but the Fe‐chlorosis resistant cultivar (Abilene) responded to clipping by quick and complete restoration of the initially suppressed phytosiderophore, whereas the susceptible cultivar (2157) did not. Clipped Abilene released more phytosiderophore per gram of root than control plants on some days, but 2157 did not. Root growth was equally suppressed by clipping in both cultivars, compared with uncut control plants. Differential effect of defoliation on phytosiderophore release by these two cultivars helps explain some of the differences in Fe‐deficiency chlorosis resistance observed in the field. These results indicate that Fe‐chlorosis resistant wheat cultivars should be selected when managing wheat for both forage and grain production on calcareous soils.
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Claims 8
Claim · model-written summary
Abilene and 2157 differed in phytosiderophore response to clipping.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- clipping of foliagee0
- Outcome
- responded differentlye0
- Direction
- differentlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abilene and 2157 wheat responded differently to clipping of foliage.”
Claim · model-written summary
Initial clipping reduced phytosiderophore release in both cultivars.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- clippinge1
- Outcome
- release of phytosiderophoree0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Initial response in both was reduced release of phytosiderophore”
e1“Abilene and 2157 wheat responded differently to clipping of foliage.”
t0“Wheat”
Claim · model-written summary
Abilene quickly and completely restored initially suppressed phytosiderophore release.
- Taxon
- WheatTriticum aestivumt0
- Material
- Abilenee0
- Outcome
- restoration of the initially suppressed phytosiderophoree0
- Direction
- restoratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Fe‐chlorosis resistant cultivar (Abilene) responded to clipping by quick and complete restoration of the initially suppressed phytosiderophore”
t0“Wheat”
Claim · model-written summary
Cultivar 2157 did not restore suppressed phytosiderophore release.
- Taxon
- WheatTriticum aestivumt0
- Material
- 2157e0
- Outcome
- restoration of the initially suppressed phytosiderophoree1
- Direction
- did note0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas the susceptible cultivar (2157) did not”
e1“quick and complete restoration of the initially suppressed phytosiderophore”
t0“Wheat”
Claim · model-written summary
Clipped Abilene released more phytosiderophore per gram of root than controls on some days.
- Taxon
- WheatTriticum aestivumt0
- Material
- Abilenee0
- Treatment
- Clippede0
- Outcome
- phytosiderophore per gram of roote0
- Direction
- moree0
- Qualifier
- on some dayse0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clipped Abilene released more phytosiderophore per gram of root than control plants on some days”
t0“Wheat”
Claim · model-written summary
Cultivar 2157 did not release more phytosiderophore than controls after clipping.
- Taxon
- WheatTriticum aestivumt0
- Material
- 2157e0
- Treatment
- Clippede1
- Outcome
- phytosiderophore per gram of roote1
- Direction
- did note0
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but 2157 did not”
e1“Clipped Abilene released more phytosiderophore per gram of root than control plants on some days”
t0“Wheat”
Claim · model-written summary
Clipping equally suppressed root growth in both cultivars versus uncut controls.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- clippinge0
- Outcome
- Root growthe0
- Direction
- suppressede0
- Comparator
- uncut control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth was equally suppressed by clipping in both cultivars, compared with uncut control plants.”
t0“Wheat”
Claim · model-written summary
Authors recommend Fe-chlorosis-resistant wheat cultivars for combined forage and grain production on calcareous soils.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Fe‐chlorosis resistant wheat cultivars should be selectede0
- Qualifier
- for both forage and grain production on calcareous soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fe‐chlorosis resistant wheat cultivars should be selected when managing wheat for both forage and grain production on calcareous soils.”
The same questions in other papers
mechanical · growth · Triticum aestivum (wheat)Positive and negative results
4 papers in the same direction as this paper · 4 in the opposite direction
- positive
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See all 9 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.