Abstract
ABSTRACT Under field conditions, wheat cultivar PBW 343 produced 1.5 times higher grain yield than PDW 233, when grown on low manganese (Mn) soil. To explain the differences in Mn efficiency a pot experiment was conducted using Mn deficient Typic ustochrept loamy sand soil treated with 0, 50, and 100 mg Mn kg−1 soil. In no-Mn treatment, both the wheat cultivars showed Mn deficiency symptoms and cultivar PBW 343 produced 30% of the maximum dry matter yield (DMY) attained at high Mn supply, while PDW 233 produced only 18% of its maximum DMY after 40 days of growth. With application of 50 mg Mn kg−1 soil, the DMY significantly increased to 87% and 50% of the maximum for PBW 343 and PDW 233, respectively. These results indicate that aestivum cultivar PBW 343 was more Mn efficient than durum cultivar PDW 233. Manganese efficient cultivar PBW 343 had a lower internal Mn requirement than PDW 233 because at the same shoot Mn concentration PBW 343 produced more DMY. The root growth of both wheat cultivars was similar at sufficient Mn supply, the root length (RL) : DMY ratio being equal. At decreasing Mn supply root growth was depressed more strongly than shoot growth, the inhibition being more severe in Mn inefficient cultivar PDW 233, indicating the importance of root system size for Mn efficiency between these two wheat cultivars. A nutrient uptake model closely described Mn influx in both the cultivars, indicating that calculated concentration profiles were realistic and that chemical mobilization of Mn in the rhizosphere was not responsible for higher Mn efficiency of PBW 343. Calculated concentration profiles showed that in soil not fertilized with Mn, initial soil solution Mn concentration of 0.23 µM decreased to only 0.21 µM at the root surface after 27 days of uptake. This 7.4% decrease in Mn concentration at the root surface indicated that roots could not decrease Mn concentration to a lower value which would have caused higher transport of Mn to root surface and hence resulted in higher Mn influx.
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Claims 17
Claim · model-written summary
Under field conditions, wheat cultivar PBW 343 produced 1.5 times higher grain yield than PDW 233 when grown on low manganese soil.
- Taxon
- wheat
Triticum aestivume1 - Material
- PBW 343e1
- Outcome
- grain yielde1
- Direction
- highere1
- Value
- 1.5 timese1
- Comparator
- PDW 233e1
- Setting
- field conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under field conditions, wheat cultivar PBW 343 produced 1.5 times higher grain yield than PDW 233”
Claim · model-written summary
In no-Mn treatment, both wheat cultivars showed Mn deficiency symptoms.
- Taxon
- wheatTriticum aestivume2
- Treatment
- no-Mn treatmente2
- Outcome
- Mn deficiency symptomse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In no-Mn treatment, both the wheat cultivars showed Mn deficiency symptoms”
Claim · model-written summary
In no-Mn treatment, cultivar PBW 343 produced 30% of the maximum dry matter yield attained at high Mn supply.
- Taxon
- wheatTriticum aestivume2
- Material
- PBW 343e3
- Treatment
- no-Mn treatmente2
- Outcome
- dry matter yield (DMY)e3
- Value
- 30%e3
- Comparator
- high Mn supplye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In no-Mn treatment, both the wheat cultivars showed Mn deficiency symptoms”
e3“cultivar PBW 343 produced 30% of the maximum dry matter yield (DMY) attained at high Mn supply”
Claim · model-written summary
In no-Mn treatment, cultivar PDW 233 produced only 18% of its maximum DMY after 40 days of growth.
- Taxon
- wheatTriticum aestivume2
- Material
- PDW 233e4
- Treatment
- no-Mn treatmente2
- Outcome
- maximum DMYe4
- Value
- 18%e4
- Qualifier
- after 40 days of growthe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In no-Mn treatment, both the wheat cultivars showed Mn deficiency symptoms”
e4“while PDW 233 produced only 18% of its maximum DMY after 40 days of growth”
Claim · model-written summary
With 50 mg Mn kg−1 soil, DMY of PBW 343 significantly increased to 87% of the maximum.
- Taxon
- wheatTriticum aestivumt0
- Material
- PBW 343e5
- Treatment
- application of 50 mg Mn kg−1 soile5
- Outcome
- DMYe5
- Direction
- increasede5
- Value
- 87%e5
- Comparator
- maximume5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e5“With application of 50 mg Mn kg−1 soil, the DMY significantly increased to 87% and 50% of the maximum for PBW 343 and PDW 233, respectively”
Claim · model-written summary
With 50 mg Mn kg−1 soil, DMY of PDW 233 significantly increased to 50% of the maximum.
- Taxon
- wheatTriticum aestivumt0
- Material
- PDW 233e5
- Treatment
- application of 50 mg Mn kg−1 soile5
- Outcome
- DMYe5
- Direction
- increasede5
- Value
- 50%e5
- Comparator
- maximume5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e5“With application of 50 mg Mn kg−1 soil, the DMY significantly increased to 87% and 50% of the maximum for PBW 343 and PDW 233, respectively”
Claim · model-written summary
Cultivar PBW 343 was more Mn efficient than durum cultivar PDW 233.
Verbatim
e6“These results indicate that aestivum cultivar PBW 343 was more Mn efficient than durum cultivar PDW 233”
Claim · model-written summary
Cultivar PBW 343 had a lower internal Mn requirement than PDW 233.
- Taxon
- wheatTriticum aestivumt0
- Material
- PBW 343e7
- Outcome
- internal Mn requiremente7
- Direction
- lowere7
- Comparator
- PDW 233e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e7“Manganese efficient cultivar PBW 343 had a lower internal Mn requirement than PDW 233”
Claim · model-written summary
At the same shoot Mn concentration, PBW 343 produced more DMY.
- Taxon
- wheatTriticum aestivumt0
- Material
- PBW 343e1
- Outcome
- DMYe1
- Direction
- moree1
- Qualifier
- at the same shoot Mn concentratione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“at the same shoot Mn concentration PBW 343 produced more DMY”
Claim · model-written summary
Root growth of both wheat cultivars was similar at sufficient Mn supply, with equal root length to DMY ratio.
- Taxon
- wheatTriticum aestivume1
- Treatment
- sufficient Mn supplye1
- Outcome
- root growthe1
- Direction
- similare1
- Qualifier
- the root length (RL) : DMY ratio being equale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The root growth of both wheat cultivars was similar at sufficient Mn supply, the root length (RL) : DMY ratio being equal”
Claim · model-written summary
At decreasing Mn supply, root growth was depressed more strongly than shoot growth.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- decreasing Mn supplye1
- Outcome
- root growthe1
- Direction
- depressed more stronglye1
- Comparator
- shoot growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“At decreasing Mn supply root growth was depressed more strongly than shoot growth”
Claim · model-written summary
Inhibition was more severe in the Mn inefficient cultivar PDW 233.
- Taxon
- wheatTriticum aestivumt0
- Material
- PDW 233e1
- Outcome
- inhibitione1
- Direction
- more severee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“the inhibition being more severe in Mn inefficient cultivar PDW 233”
Claim · model-written summary
A nutrient uptake model closely described Mn influx in both cultivars.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Mn influxe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Schema note from the model: model-fit result; no comparator or value stated
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“A nutrient uptake model closely described Mn influx in both the cultivars”
Claim · model-written summary
Chemical mobilization of Mn in the rhizosphere was not responsible for the higher Mn efficiency of PBW 343.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- higher Mn efficiency of PBW 343e1
- Qualifier
- chemical mobilization of Mn in the rhizosphere was not responsiblee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“chemical mobilization of Mn in the rhizosphere was not responsible for higher Mn efficiency of PBW 343”
Claim · model-written summary
The importance of root system size for Mn efficiency is indicated between these two wheat cultivars.
- Taxon
- wheatTriticum aestivume1
- Outcome
- Mn efficiencye1
- Qualifier
- importance of root system sizee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“indicating the importance of root system size for Mn efficiency between these two wheat cultivars”
Claim · model-written summary
Calculated profiles showed that in soil not fertilized with Mn, soil solution Mn concentration decreased from 0.23 µM to only 0.21 µM at the root surface after 27 days of uptake.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- soil not fertilized with Mne1
- Outcome
- soil solution Mn concentratione1
- Direction
- decreasede1
- Value
- 0.21 µMe1
- Qualifier
- after 27 days of uptakee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“Calculated concentration profiles showed that in soil not fertilized with Mn, initial soil solution Mn concentration of 0.23 µM decreased to only 0.21 µM at the root surface after 27 days of uptake”
Claim · model-written summary
The decrease in Mn concentration at the root surface was 7.4%, indicating roots could not decrease Mn concentration to a lower value.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Mn concentration at the root surfacee1
- Direction
- decreasee1
- Value
- 7.4%e1
- Qualifier
- roots could not decrease Mn concentration to a lower valuee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MANGANESE EFFICIENCY OF WHEAT CULTIVARS”
e1“This 7.4% decrease in Mn concentration at the root surface indicated that roots could not decrease Mn concentration to a lower value which would have caused higher transport of Mn to root surface and hence resulted in higher Mn influx”
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See all 65 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.