Abstract
Abstract Differences in nutrient recovery from fertiliser bands may improve cereal variety selection. The objective of this study was to identify the variation in root plasticity across commonly grown Australian wheat ( Triticum aestivum L.) cultivars in response to a phosphorus (P)‐enriched band. Ten wheat cultivars were screened for root proliferation within a 150 mg P kg −1 band in P‐responsive soil. Plants were destructively harvested at the four‐leaf phenological stage and various growth parameters, including root length density (RLD), were measured on banded and uniformly adequate P treatments. All wheat cultivars increased RLD between three and nine times in the P band. However, there was no significant difference in root plasticity among the cultivars tested. Although all cultivars produced longer, though ≈ 9% thinner roots when responding to the P band, the phenotypic response was unable to compensate fully for the lower P status encountered in the soil. Despite 23% longer root lengths in the P‐band treatments, P uptake per unit root length was 78% lower than in uniformly adequate P treatments. Our results indicate that root plasticity of wheat cultivars in a P‐enriched band was phenotypically similar. Further research is necessary before selecting for wheat cultivars that respond to localised nutrient patches with increased RLD.
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Claims 8
Claim · model-written summary
All wheat cultivars increased root length density three to nine times in a phosphorus band.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- P bande0
- Outcome
- RLDe0
- Direction
- increasede0
- Value
- between three and nine timese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All wheat cultivars increased RLD between three and nine times in the P band.”
Claim · model-written summary
Root plasticity did not differ significantly among cultivars.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- root plasticitye0
- Direction
- no significant differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant difference in root plasticity among the cultivars tested.”
t0“wheat cultivars”
Claim · model-written summary
Cultivars developed longer roots in response to the phosphorus band.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- P bande0
- Outcome
- rootse0
- Direction
- longere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all cultivars produced longer, though ≈ 9% thinner roots when responding to the P band”
t0“wheat cultivars”
Claim · model-written summary
Cultivars developed about 9% thinner roots in the phosphorus band.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all cultivars produced longer, though ≈ 9% thinner roots when responding to the P band”
t0“wheat cultivars”
Claim · model-written summary
Root response did not fully compensate for lower soil phosphorus status.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- unable to compensate fully for the lower P statuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the phenotypic response was unable to compensate fully for the lower P status encountered in the soil.”
t0“wheat cultivars”
Claim · model-written summary
Root length was 23% longer under phosphorus banding.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- P‐band treatmentse0
- Outcome
- root lengthse0
- Direction
- longere0
- Value
- 23%e0
- Comparator
- uniformly adequate P treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite 23% longer root lengths in the P‐band treatments, P uptake per unit root length was 78% lower than in uniformly adequate P treatments.”
t0“wheat cultivars”
Claim · model-written summary
Phosphorus uptake per root length was 78% lower with banding than with uniform phosphorus.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- P‐band treatmentse0
- Outcome
- P uptake per unit root lengthe0
- Direction
- lowere0
- Value
- 78%e0
- Comparator
- uniformly adequate P treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite 23% longer root lengths in the P‐band treatments, P uptake per unit root length was 78% lower than in uniformly adequate P treatments.”
t0“wheat cultivars”
Claim · model-written summary
The authors recommend more research before selecting cultivars for increased root length density in nutrient patches.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Further research is necessary before selecting for wheat cultivars that respond to localised nutrient patches with increased RLDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Further research is necessary before selecting for wheat cultivars that respond to localised nutrient patches with increased RLD.”