Abstract
A pot soil experiment was conducted to investigate the effects of varying soil copper (Cu) concentration on growth, and on its accumulation pattern in different parts of rice plant (Oryza sativa L.) in 2018, Thailand. The treatments imposed were 0, 50, 100, 200, 400 Cu mg/kg (T1 to T5, respectively). Exposure to 100 mg Cu/kg and above at tillering stage; or to 200 Cu mg/kg and above at panicle initiation stage, significantly decreased the plant height. Exposure to 200 Cu mg/kg (T4) produced significantly lower number tillers per pot than T1 or T2. Negative significant correlation between grain yield of rice and soil Cu concentrations was observed. Increasing accumulation of Cu in grain in a dose-dependent manner occurred, with the peak concentration for T3 (11.39 mg/kg). Copper accumulation by tissue had the rank order grain < shoot < root. About 54 to 91% of total absorbed Cu was retained in the root and 2 to 12% of total Cu uptake was translocated to grain. This is beneficial from the point of view of food safety. In other words, the accumulation of Cu in brown rice in current experiment was below the permissible contaminant limit in food, in Thailand.
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Claims 10
Claim · model-written summary
Soil copper at 100 mg/kg and above applied at the tillering stage significantly decreased rice plant height.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- tillering stagee1
- Treatment
- Exposure to 100 mg Cu/kg and abovee1
- Outcome
- plant heighte1
- Direction
- decreasede1
- Setting
- pot soil experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot soil experiment was conducted”
e1“Exposure to 100 mg Cu/kg and above at tillering stage; or to 200 Cu mg/kg and above at panicle initiation stage, significantly decreased the plant height”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Soil copper at 200 mg/kg and above applied at the panicle initiation stage significantly decreased rice plant height.
- Taxon
- riceOryza sativat0
- Organ / stage
- panicle initiation stagee1
- Treatment
- 200 Cu mg/kg and abovee1
- Outcome
- plant heighte1
- Direction
- decreasede1
- Setting
- pot soil experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot soil experiment was conducted”
e1“or to 200 Cu mg/kg and above at panicle initiation stage, significantly decreased the plant height”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Exposure to 200 Cu mg/kg (T4) significantly decreased the number of tillers per pot compared with T1 or T2.
- Taxon
- riceOryza sativat0
- Treatment
- Exposure to 200 Cu mg/kg (T4)e1
- Outcome
- number tillers per pote1
- Direction
- lowere1
- Comparator
- T1 or T2e1
- Setting
- pot soil experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot soil experiment was conducted”
e1“Exposure to 200 Cu mg/kg (T4) produced significantly lower number tillers per pot than T1 or T2”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Grain yield of rice was negatively correlated with soil copper concentration.
- Taxon
- riceOryza sativat0
- Treatment
- soil Cu concentrationse1
- Outcome
- grain yielde1
- Direction
- Negativee1
- Setting
- pot soil experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot soil experiment was conducted”
e1“Negative significant correlation between grain yield of rice and soil Cu concentrations was observed”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Copper accumulation in grain increased with soil copper dose in a dose-dependent manner.
- Taxon
- riceOryza sativat0
- Organ / stage
- graine1
- Outcome
- accumulation of Cu in graine1
- Direction
- Increasinge1
- Qualifier
- in a dose-dependent mannere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increasing accumulation of Cu in grain in a dose-dependent manner occurred”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
The peak grain copper concentration was 11.39 mg/kg at T3.
- Taxon
- riceOryza sativat0
- Organ / stage
- graine1
- Outcome
- peak concentratione1
- Value
- 11.39 mg/kge1
- Qualifier
- for T3e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increasing accumulation of Cu in grain in a dose-dependent manner occurred, with the peak concentration for T3 (11.39 mg/kg)”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Copper accumulation by tissue followed the rank order grain < shoot < root.
- Taxon
- riceOryza sativat0
- Organ / stage
- grain < shoot < roote1
- Outcome
- Copper accumulation by tissuee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Copper accumulation by tissue had the rank order grain < shoot < root”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
About 54 to 91% of total absorbed copper was retained in the root.
- Taxon
- riceOryza sativat0
- Organ / stage
- roote1
- Outcome
- total absorbed Cu was retainede1
- Value
- 54 to 91%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“About 54 to 91% of total absorbed Cu was retained in the root”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
About 2 to 12% of total copper uptake was translocated to grain.
- Taxon
- riceOryza sativat0
- Organ / stage
- graine1
- Outcome
- translocated to graine1
- Value
- 2 to 12%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“2 to 12% of total Cu uptake was translocated to grain”
t0“Rice Plant (Oryza SativaL.)”
Claim · model-written summary
Copper accumulation in brown rice in the experiment was below the permissible food contaminant limit in Thailand.
- Taxon
- riceOryza sativat0
- Organ / stage
- brown ricee1
- Outcome
- accumulation of Cu in brown ricee1
- Direction
- belowe1
- Comparator
- permissible contaminant limit in foode1
- Setting
- Thailande1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the accumulation of Cu in brown rice in current experiment was below the permissible contaminant limit in food, in Thailand”
t0“Rice Plant (Oryza SativaL.)”
The same questions in other papers
copper atom · growth · Oryza sativa (rice)Results differ
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- positive
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10 papers in the same direction as this paper · 31 in the opposite direction
- negative
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See all 42 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.