Abstract
Young rice plants were solution-cultured in artificially illuminated growth cabinets under combinations of 35 (ambient) or 70 (high) Pa atmospheric CO2 and 0.6, 6, 60 or 600μM phosphorus (P) nutrition with other growth conditions of 12-h day (450μmol m-2 s-1 PPFD) /12-h night cycle at 28/23°C and about 60% RH. Generally, the growth and dry matter production were promoted by high CO2 and the effects were enlarged with elevating P level up to 60μM but the highest P (600μM) decreased the CO2 effects. At the lowest P (0.6μM), the root growth was substantially promoted at the sacrifice of shoot growth. The net assimilation rate (NAR) was largely promoted by high CO2 but not by P nutrition. The high CO2 decreased the leaf weight ratio (LWR), which indicated the relative promotion of dry matter partitioning to organs other than leaves. The mineral nutrient (P, K, Ca, Mg) content was also decreased by high CO2, probably because of the dilution effect of carbohydrate accumulation. The P use efficiency in dry matter production decreased with increasing P levels but high CO2 ameliorated the effect of P. It was concluded that the growth of rice plants in poor P conditions would be ameliorated at high CO2 levels. However, substantial amounts of P should be applied for their full growth.
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Claims 13
Claim · model-written summary
High CO2 promoted rice growth and dry matter production.
- Taxon
- Rice Plants
Oryza sativat0 - Treatment
- high CO2e0
- Outcome
- growth and dry matter productione0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth and dry matter production were promoted by high CO2”
t0“Rice Plants”
Claim · model-written summary
Increasing phosphorus to 60μM amplified the growth effect of high CO2.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- elevating P level up to 60μMe0
- Outcome
- effectse0
- Direction
- enlargede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects were enlarged with elevating P level up to 60μM”
t0“Rice Plants”
Claim · model-written summary
At 600μM phosphorus, the CO2 growth effect declined.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- highest P (600μM)e0
- Outcome
- CO2 effectse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest P (600μM) decreased the CO2 effects”
t0“Rice Plants”
Claim · model-written summary
At the lowest phosphorus level, root growth increased at the expense of shoots.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- lowest P (0.6μM)e0
- Outcome
- root growthe0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the lowest P (0.6μM), the root growth was substantially promoted at the sacrifice of shoot growth”
t0“Rice Plants”
Claim · model-written summary
At the lowest phosphorus level, shoot growth was sacrificed.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- lowest P (0.6μM)e0
- Outcome
- shoot growthe0
- Direction
- at the sacrifice ofe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the lowest P (0.6μM), the root growth was substantially promoted at the sacrifice of shoot growth”
t0“Rice Plants”
Claim · model-written summary
High CO2 promoted net assimilation rate.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- high CO2e0
- Outcome
- net assimilation rate (NAR)e0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The net assimilation rate (NAR) was largely promoted by high CO2”
t0“Rice Plants”
Claim · model-written summary
Phosphorus nutrition did not promote net assimilation rate.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- P nutritione0
- Outcome
- net assimilation rate (NAR)e0
- Direction
- not bye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The net assimilation rate (NAR) was largely promoted by high CO2 but not by P nutrition”
t0“Rice Plants”
Claim · model-written summary
High CO2 reduced leaf weight ratio.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- high CO2e0
- Outcome
- leaf weight ratio (LWR)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The high CO2 decreased the leaf weight ratio (LWR)”
t0“Rice Plants”
Claim · model-written summary
High CO2 reduced mineral nutrient content.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- high CO2e0
- Outcome
- mineral nutrient (P, K, Ca, Mg) contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mineral nutrient (P, K, Ca, Mg) content was also decreased by high CO2”
t0“Rice Plants”
Claim · model-written summary
Phosphorus use efficiency in dry matter production declined with increasing phosphorus.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- increasing P levelse0
- Outcome
- P use efficiency in dry matter productione0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The P use efficiency in dry matter production decreased with increasing P levels”
t0“Rice Plants”
Claim · model-written summary
High CO2 ameliorated the negative effect of phosphorus on phosphorus use efficiency.
- Taxon
- Rice PlantsOryza sativat0
- Treatment
- high CO2e0
- Outcome
- effect of Pe0
- Direction
- amelioratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high CO2 ameliorated the effect of P”
t0“Rice Plants”
Claim · model-written summary
The authors concluded high CO2 would ameliorate rice growth under poor phosphorus.
- Taxon
- rice plantsOryza sativae0
- Treatment
- high CO2 levelse0
- Outcome
- growth of rice plants in poor P conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth of rice plants in poor P conditions would be ameliorated at high CO2 levels”
Claim · model-written summary
The authors advised substantial phosphorus application for full rice growth.
- Taxon
- Rice PlantsOryza sativat0
- Outcome
- substantial amounts of P should be applied for their full growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“substantial amounts of P should be applied for their full growth”
t0“Rice Plants”
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See all 159 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.