Abstract
Abstract Barley ( Hordeum vulgare var. Varde) grown in zinc‐polluted soils with variable levels of Zn, Mn, and Fe showed no marked differences in the yield attributable to these variables in both soils investigated. However, in direct contrast to results reported by other investigators, concentrations of 65 Zn and total zinc were found to increase with increased levels of added Mn and/or Fe with few exceptions. Similarly, concentrations of 54 Mn and total Mn also increased with increased levels of Zn and/or Fe. The effects of Zn and Mn on the concentrations of 59 Fe and total Fe were inconsistent. The concentration of Mo was found to decrease with increased levels of Zn, Mn, and Fe and the decrease was more pronounced in one soil than in the other. Although concentration of Cu also showed a slight tendency to decrease with Zn, Mn, and Fe application, the results were inconsistent in both the soils. In general, labelled nutrient elements were more mobile in barley plants than corresponding soil‐derived nutrients as evident in the relative percentage distributions between roots and tops. The percentage distribution of Zn, Mn, Fe, Mo, and Cu between roots and tops was apparently not affected by the presence of their interacting ions. The effects of Zn on Mn distribution and that of Mn on Mo distribution, were, however, noticeable. It is concluded that though Zn, Fe, and Mn ions in barley appear to have limited influence on translocation within the plant, these ions exert strong synergistic effects at the site of transport. There appeared to be pronounced antagonism between Mo‐Zn, Mo‐Fe, and Mo‐Mn in the metabolism of barley.
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Claims 10
Claim · model-written summary
Zn, Mn and Fe levels showed no marked yield differences in barley.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaree0 - Material
- Vardee0
- Treatment
- variable levels of Zn, Mn, and Fee0
- Outcome
- yielde0
- Direction
- no marked differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Barley ( Hordeum vulgare var. Varde) grown in zinc‐polluted soils with variable levels of Zn, Mn, and Fe showed no marked differences in the yield attributable to these variables in both soils investigated.”
Claim · model-written summary
Added Mn and Fe generally increased barley zinc concentrations.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- added Mn and/or Fee0
- Outcome
- concentrations of 65 Zn and total zince0
- Direction
- increasee0
- Qualifier
- with few exceptionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of 65 Zn and total zinc were found to increase with increased levels of added Mn and/or Fe with few exceptions”
t0“Barley”
Claim · model-written summary
Added Zn and Fe increased barley Mn concentrations.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zn and/or Fee0
- Outcome
- concentrations of 54 Mn and total Mne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of 54 Mn and total Mn also increased with increased levels of Zn and/or Fe”
t0“Barley”
Claim · model-written summary
Zn and Mn had inconsistent effects on Fe concentrations.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zn and Mne0
- Outcome
- concentrations of 59 Fe and total Fee0
- Direction
- inconsistente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of Zn and Mn on the concentrations of 59 Fe and total Fe were inconsistent.”
t0“Barley”
Claim · model-written summary
Increasing Zn, Mn and Fe reduced Mo concentration, with a larger decrease in one soil.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- increased levels of Zn, Mn, and Fee0
- Outcome
- concentration of Moe0
- Direction
- decreasee0
- Qualifier
- more pronounced in one soil than in the othere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of Mo was found to decrease with increased levels of Zn, Mn, and Fe and the decrease was more pronounced in one soil than in the other.”
t0“Barley”
Claim · model-written summary
Cu concentration tended to decline under Zn, Mn and Fe application, inconsistently.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zn, Mn, and Fe applicatione0
- Outcome
- concentration of Cue0
- Direction
- decreasee0
- Qualifier
- inconsistent in both the soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentration of Cu also showed a slight tendency to decrease with Zn, Mn, and Fe application, the results were inconsistent in both the soils”
t0“Barley”
Claim · model-written summary
Labelled nutrients were more mobile than soil-derived nutrients in barley.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- labelled nutrient elementse0
- Direction
- more mobilee0
- Comparator
- soil‐derived nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“labelled nutrient elements were more mobile in barley plants than corresponding soil‐derived nutrients”
Claim · model-written summary
Interacting ions apparently did not affect root-to-top distribution of Zn, Mn, Fe, Mo and Cu.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- percentage distribution of Zn, Mn, Fe, Mo, and Cu between roots and topse0
- Direction
- not affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage distribution of Zn, Mn, Fe, Mo, and Cu between roots and tops was apparently not affected by the presence of their interacting ions.”
t0“Barley”
Claim · model-written summary
Zn affected Mn distribution and Mn affected Mo distribution.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- Mn distributione0
- Direction
- noticeablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of Zn on Mn distribution and that of Mn on Mo distribution, were, however, noticeable.”
t0“Barley”
Claim · model-written summary
The authors infer synergism among Zn, Fe and Mn ions at transport and antagonism between Mo and each of Zn, Fe and Mn in barley metabolism.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- metabolism of barleye0
- Qualifier
- pronounced antagonism between Mo‐Zn, Mo‐Fe, and Mo‐Mne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these ions exert strong synergistic effects at the site of transport. There appeared to be pronounced antagonism between Mo‐Zn, Mo‐Fe, and Mo‐Mn in the metabolism of barley.”
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See all 15 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.