Abstract
Abstract Aluminum (Al) tolerance and phosphate absorption in rape and tomato were compared under water culture and field conditions. The relative growth rate in the Al treatment compared with -A1 treatment was similar in the two crops under water culture conditions, while under field conditions, the growth rate was 2- to 3-fold higher in rape than in tomato in spite of the higher Al concentration in the soil solution than in the culture solution. The relative amount of phosphate absorbed in the Al treatment compared with - Al was not appreciably different between rape and tomato under water culture conditions, while under field conditions, it was 3- to 6-fold larger in rape than in tomato. The exudation rate of citric acid by roots was much higher in rape than in tomato. The plant growth, root elongation, and amount of phosphate absorbed in rape were inhibited in the 150 µM Al in the culture solution. However, the inhibition was alleviated by the addition of 200 µM citric acid or 500 µM malic acid. The P concentration in the culture solution decreased by the presence of Al as aluminum phosphate. However, addition of citric and malic acids increased the amount of phosphate released from the precipitated aluminum phosphate. In conclusion, one of the mechanisms for the higher Al tolerance and larger phosphate absorption in rape than in tomato under field conditions was ascribed to the higher concentration of exuded citric acid by Al in the rhizosphere. It was suggested that the exudation of citric acid might contribute to the detoxification of Al and to the increase phosphate availability in the rhizosphere in rape.
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Claims 12
Claim · model-written summary
In water culture, the relative growth rate under Al treatment compared with the -Al treatment was similar in rape.
- Taxon
- rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- Al treatmente1
- Outcome
- relative growth ratee1
- Direction
- no_changeinferrede1
- Comparator
- -A1 treatmente1
- Setting
- water culture conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Aluminum (Al) tolerance and phosphate absorption in rape and tomato were compared under water culture and field conditions”
e1“The relative growth rate in the Al treatment compared with -A1 treatment was similar in the two crops under water culture conditions”
Claim · model-written summary
In water culture, the relative growth rate under Al treatment compared with the -Al treatment was similar in tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- Al treatmente1
- Outcome
- relative growth ratee1
- Direction
- no_changeinferrede1
- Comparator
- -A1 treatmente1
- Setting
- water culture conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminum (Al) tolerance and phosphate absorption in rape and tomato were compared under water culture and field conditions”
e1“The relative growth rate in the Al treatment compared with -A1 treatment was similar in the two crops under water culture conditions”
Claim · model-written summary
Under field conditions, the growth rate of rape was 2- to 3-fold higher than that of tomato despite a higher Al concentration in the soil solution.
- Taxon
- rapeBrassica napuse2
- Outcome
- growth ratee2
- Direction
- highere2
- Value
- 2- to 3-folde2
- Qualifier
- in spite of the higher Al concentration in the soil solutione2
- Comparator
- tomatoe2
- Setting
- field conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“under field conditions, the growth rate was 2- to 3-fold higher in rape than in tomato in spite of the higher Al concentration in the soil solution”
Claim · model-written summary
Under field conditions, the relative amount of phosphate absorbed was 3- to 6-fold larger in rape than in tomato.
- Taxon
- rapeBrassica napuse4
- Outcome
- relative amount of phosphate absorbede3
- Direction
- largere4
- Value
- 3- to 6-folde4
- Comparator
- tomatoe4
- Setting
- field conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The relative amount of phosphate absorbed in the Al treatment compared with - Al was not appreciably different between rape and tomato under water culture conditions, while under field conditions, it was 3- to 6-fold larger in rape than in tomato”
e4“under field conditions, it was 3- to 6-fold larger in rape than in tomato”
Claim · model-written summary
In water culture, the relative amount of phosphate absorbed under Al treatment did not differ appreciably between rape and tomato.
- Taxon
- rapeBrassica napuse3
- Outcome
- relative amount of phosphate absorbede3
- Direction
- no_changeinferrede3
- Comparator
- tomatoe3
- Setting
- water culture conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The relative amount of phosphate absorbed in the Al treatment compared with - Al was not appreciably different between rape and tomato under water culture conditions”
Claim · model-written summary
The exudation rate of citric acid by roots was much higher in rape than in tomato.
- Taxon
- rapeBrassica napuse5
- Organ / stage
- rootse5
- Outcome
- exudation rate of citric acide5
- Direction
- much highere5
- Comparator
- tomatoe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The exudation rate of citric acid by roots was much higher in rape than in tomato”
Claim · model-written summary
Al inhibited plant growth, root elongation and phosphate absorption in rape at 150 µM Al.
- Taxon
- rapeBrassica napuse6
- Treatment
- 150 µM Ale6
- Outcome
- plant growth, root elongation, and amount of phosphate absorbede6
- Direction
- inhibitede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The plant growth, root elongation, and amount of phosphate absorbed in rape were inhibited in the 150 µM Al in the culture solution”
Claim · model-written summary
Adding 200 µM citric acid or 500 µM malic acid alleviated the Al inhibition in rape.
- Taxon
- rapeBrassica napuse0
- Treatment
- 200 µM citric acid or 500 µM malic acide7
- Outcome
- inhibitione7
- Direction
- alleviatede7
- Comparator
- 150 µM Ale6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aluminum (Al) tolerance and phosphate absorption in rape and tomato were compared under water culture and field conditions”
e6“The plant growth, root elongation, and amount of phosphate absorbed in rape were inhibited in the 150 µM Al in the culture solution”
e7“However, the inhibition was alleviated by the addition of 200 µM citric acid or 500 µM malic acid”
Claim · model-written summary
Phosphate concentration in the culture solution decreased in the presence of Al, as aluminum phosphate.
- Treatment
- presence of Ale1
- Outcome
- P concentration in the culture solutione1
- Direction
- decreasede1
- Qualifier
- as aluminum phosphatee1
Not reportedTaxonComparator
Verbatim
e1“The P concentration in the culture solution decreased by the presence of Al as aluminum phosphate”
Claim · model-written summary
Citric and malic acids increased the amount of phosphate released from precipitated aluminum phosphate.
- Treatment
- addition of citric and malic acidse2
- Outcome
- amount of phosphate released from the precipitated aluminum phosphatee2
- Direction
- increasede2
Not reportedTaxonComparator
Verbatim
e2“addition of citric and malic acids increased the amount of phosphate released from the precipitated aluminum phosphate”
Claim · model-written summary
Higher exudation of citric acid in the rhizosphere under field conditions is one mechanism for the higher Al tolerance and larger phosphate absorption of rape compared with tomato.
- Taxon
- rapeBrassica napuse3
- Compound
- citric acide3
- Outcome
- higher Al tolerance and larger phosphate absorptione3
- Comparator
- tomatoe3
- Setting
- under field conditionse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“one of the mechanisms for the higher Al tolerance and larger phosphate absorption in rape than in tomato under field conditions was ascribed to the higher concentration of exuded citric acid by Al in the rhizosphere”
Claim · model-written summary
Citric acid exudation might contribute to Al detoxification and to increased phosphate availability in the rhizosphere of rape.
- Taxon
- rapeBrassica napuse4
- Compound
- citric acide4
- Outcome
- detoxification of Al and to the increase phosphate availabilitye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“It was suggested that the exudation of citric acid might contribute to the detoxification of Al and to the increase phosphate availability in the rhizosphere in rape”
The same questions in other papers
aluminium atom · growth · Brassica napus (oilseed rape)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →aluminium atom · growth · Solanum lycopersicum (tomato)Positive and negative results
3 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.