Abstract
Abstract Phosphorus (P)–zinc (Zn) interactions in two barley cultivars (Clipper and Sahara) differing in P and Zn efficiencies were investigated in a pot experiment carried out in a growth chamber. A highly calcareous field soil from a semi‐arid region of South Australia was used. Five levels of P addition and three levels of Zn addition were used. Plants were harvested five weeks after emergence. Increase in P supply significantly increased plant shoot biomass and tissue P concentrations in both cultivars, indicating that the soil used is P deficient. Zinc additions with low P additions caused slight decreases in plant biomass. However, Zn addition did increase plant growth when higher levels of P were applied demonstrating the importance of the balance Zn and P supply. Results showed that the genotypic difference between the two cultivars in P uptake efficiency (specific P uptake, SPU) can be altered by Zn–P interactions, and that total Zn uptake by Sahara was higher than Clipper irrespective of P supply. Tissue Zn concentrations decreased significantly with an increase in P supply in both cultivars. Increase in P supply drastically reduced the molar ratio of Zn to P in shoots (MRZP), and addition of Zn compensated for the reduction in MRZP due to P addition. The role of P–Zn interactions in the context of nutritional quality of plant food is also discussed.
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Claims 9
Claim · model-written summary
Increasing P supply significantly increased shoot biomass in both barley cultivars.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- Increase in P supplye0
- Outcome
- plant shoot biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Increase in P supply significantly increased plant shoot biomass and tissue P concentrations in both cultivars”
t0“Barley Cultivars”
Claim · model-written summary
Increasing P supply significantly increased tissue P concentrations in both cultivars.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Increase in P supplye0
- Outcome
- tissue P concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in P supply significantly increased plant shoot biomass and tissue P concentrations in both cultivars”
t0“Barley Cultivars”
Claim · model-written summary
Zn additions at low P supply caused slight decreases in plant biomass.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zinc additions with low P additionse0
- Outcome
- plant biomasse0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc additions with low P additions caused slight decreases in plant biomass”
t0“Barley Cultivars”
Claim · model-written summary
Zn addition increased plant growth at higher P levels.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zn additione0
- Outcome
- plant growthe0
- Direction
- increasee0
- Qualifier
- higher levels of Pe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn addition did increase plant growth when higher levels of P were applied”
t0“Barley Cultivars”
Claim · model-written summary
Zn–P interactions altered the cultivar difference in specific P uptake.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Zn–P interactionse0
- Outcome
- P uptake efficiencye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“genotypic difference between the two cultivars in P uptake efficiency (specific P uptake, SPU) can be altered by Zn–P interactions”
t0“Barley Cultivars”
Claim · model-written summary
Sahara had higher total Zn uptake than Clipper irrespective of P supply.
- Taxon
- BarleyHordeum vulgaret0
- Material
- Saharae0
- Outcome
- total Zn uptakee0
- Direction
- highere0
- Qualifier
- irrespective of P supplye0
- Comparator
- Clippere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total Zn uptake by Sahara was higher than Clipper irrespective of P supply”
t0“Barley Cultivars”
Claim · model-written summary
Increasing P supply significantly decreased tissue Zn concentrations in both cultivars.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- increase in P supplye0
- Outcome
- Tissue Zn concentrationse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tissue Zn concentrations decreased significantly with an increase in P supply in both cultivars”
t0“Barley Cultivars”
Claim · model-written summary
Increasing P supply drastically reduced the shoot molar ratio of Zn to P.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Increase in P supplye0
- Outcome
- molar ratio of Zn to P in shootse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in P supply drastically reduced the molar ratio of Zn to P in shoots (MRZP)”
t0“Barley Cultivars”
Claim · model-written summary
Zn addition compensated for the P-induced reduction in shoot Zn:P ratio.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- addition of Zne0
- Outcome
- MRZPe0
- Direction
- compensatede0
- Qualifier
- due to P additione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“addition of Zn compensated for the reduction in MRZP due to P addition”
t0“Barley Cultivars”
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