Abstract
BACKGROUND AND AIMS: Acidic soils are dominated chemically by more ammonium and more available, so more potentially toxic, aluminium compared with neutral to calcareous soils, which are characterized by more nitrate and less available, so less toxic, aluminium. However, it is not known whether aluminium tolerance and nitrogen source preference are linked in plants. METHODS: This question was investigated by comparing the responses of 30 rice (Oryza sativa) varieties (15 subsp. japonica cultivars and 15 subsp. indica cultivars) to aluminium, various ammonium/nitrate ratios and their combinations under acidic solution conditions. KEY RESULTS: indica rice plants were generally found to be aluminium-sensitive and nitrate-preferring, while japonica cultivars were aluminium-tolerant and relatively ammonium-preferring. Aluminium tolerance of different rice varieties was significantly negatively correlated with their nitrate preference. Furthermore, aluminium enhanced ammonium-fed rice growth but inhibited nitrate-fed rice growth. CONCLUSIONS: The results suggest that aluminium tolerance in rice is antagonistic with nitrate preference and synergistic with ammonium preference under acidic solution conditions. A schematic diagram summarizing the interactions of aluminium and nitrogen in soil-plant ecosystems is presented and provides a new basis for the integrated management of acidic soils.
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Claims 5
Claim · model-written summary
Indica rice was generally aluminium-sensitive and nitrate-preferring.
- Taxon
- rice
Oryza sativae0 - Material
- indicae0
- Outcome
- aluminium-sensitive and nitrate-preferringe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indica rice plants were generally found to be aluminium-sensitive and nitrate-preferring”
Claim · model-written summary
Japonica rice cultivars were aluminium-tolerant and relatively ammonium-preferring.
- Taxon
- riceOryza sativae1
- Material
- japonicae0
- Outcome
- aluminium-tolerant and relatively ammonium-preferringe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“japonica cultivars were aluminium-tolerant and relatively ammonium-preferring”
e1“rice (Oryza sativa)”
Claim · model-written summary
Aluminium tolerance was significantly negatively correlated with nitrate preference among rice varieties.
- Taxon
- riceOryza sativae0
- Material
- different rice varietiese0
- Outcome
- Aluminium tolerancee0
- Direction
- negatively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminium tolerance of different rice varieties was significantly negatively correlated with their nitrate preference”
Claim · model-written summary
Aluminium enhanced ammonium-fed rice growth.
- Taxon
- riceOryza sativae0
- Treatment
- aluminiume0
- Outcome
- rice growthe0
- Direction
- enhancede0
- Qualifier
- ammonium-fede0
- Setting
- acidic solution conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aluminium enhanced ammonium-fed rice growth”
e1“various ammonium/nitrate ratios and their combinations under acidic solution conditions”
Claim · model-written summary
Aluminium inhibited nitrate-fed rice growth.
- Taxon
- riceOryza sativae0
- Treatment
- aluminiume0
- Outcome
- rice growthe0
- Direction
- inhibitede0
- Qualifier
- nitrate-fede0
- Setting
- acidic solution conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aluminium enhanced ammonium-fed rice growth but inhibited nitrate-fed rice growth”
e1“their combinations under acidic solution conditions”
The same questions in other papers
aluminium atom · growth · Oryza sativa (rice)Results differ
15 papers in the same direction as this paper · 37 in the opposite direction
- negative
- positive
- positive
49 papers more in this group
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