Abstract
Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars, Kasalath (a traditional indica), IR36 (an improved indica), Shirobeniya (a conventional japonica), Nipponbare (an improved japonica), BSI429 (an improved tropical japonica, a new plant type line) and Akenohoshi (an improved japonica-indica cross). At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars, and there were significant "cultivar N" interactions; the magnitudes of these decreases caused by limited N supply were smallest in Akenohoshi. There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions, whereas there was a significant positive correlation between grain weight and DW under the LN condition but not under the SN condition. Grain weight was more closely correlated with sink size under both N conditions. Among the cultivars examined, Akenohoshi showed the highest DW, fertility % and sink size under the LN condition, leading the highest grain weight. It is suggested that Akenohoshi is a breeding material useful for the improvement of adaptability to LN environment.
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Claims 12
Claim · model-written summary
Nitrogen limitation significantly decreased aboveground dry weight of rice cultivars at maturity relative to standard nitrogen.
- Taxon
- rice
Oryza sativae0 - Treatment
- N limitatione1
- Outcome
- aboveground dry weight (DW)e1
- Direction
- decreasese1
- Comparator
- standard-Ne2
- Setting
- pot-growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e2“There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions”
Claim · model-written summary
Nitrogen limitation significantly decreased grain weight and panicle number per plant in rice cultivars relative to standard nitrogen.
- Taxon
- riceOryza sativae0
- Treatment
- N limitatione1
- Outcome
- grain weight, panicle number per plante1
- Direction
- decreasese1
- Comparator
- standard-Ne2
- Setting
- pot-growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e2“There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions”
Claim · model-written summary
Nitrogen limitation significantly decreased fertility percentage and sink size in rice cultivars relative to standard nitrogen.
- Taxon
- riceOryza sativae0
- Treatment
- N limitatione1
- Outcome
- fertility % and sink sizee1
- Direction
- decreasese1
- Comparator
- standard-Ne2
- Setting
- pot-growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e2“There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions”
Claim · model-written summary
Nitrogen limitation significantly decreased DW increased during heading to maturity in rice cultivars relative to standard nitrogen.
- Taxon
- riceOryza sativae0
- Treatment
- N limitatione1
- Outcome
- DW increased during heading to maturity (DW)e1
- Direction
- decreasese1
- Comparator
- standard-Ne2
- Setting
- pot-growne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e2“There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions”
Claim · model-written summary
Nitrogen limitation and cultivar interacted significantly in rice.
- Taxon
- riceOryza sativae0
- Treatment
- N limitatione1
- Outcome
- cultivar Ne2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e2“there were significant "cultivar N" interactions”
Claim · model-written summary
Grain weight was positively correlated with aboveground DW at maturity under both standard-N and low-N conditions.
- Taxon
- riceOryza sativae0
- Treatment
- standard-N (SN) and low-N (LN) conditionse2
- Outcome
- grain weight and aboveground DW at maturitye2
- Direction
- positivee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e2“There were significant positive correlations between grain weight and aboveground DW at maturity under both standard-N (SN) and low-N (LN) conditions”
Claim · model-written summary
Grain weight was positively correlated with DW under low N but not under standard N.
- Taxon
- riceOryza sativae0
- Treatment
- LN conditione3
- Outcome
- grain weight and DWe3
- Direction
- positivee3
- Qualifier
- but not under the SN conditione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e3“whereas there was a significant positive correlation between grain weight and DW under the LN condition but not under the SN condition”
Claim · model-written summary
Grain weight was more closely correlated with sink size under both N conditions in rice.
- Taxon
- riceOryza sativae0
- Treatment
- both N conditionse4
- Outcome
- Grain weighte4
- Direction
- more closely correlatede4
- Qualifier
- with sink sizee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e4“Grain weight was more closely correlated with sink size under both N conditions”
Claim · model-written summary
Akenohoshi showed the highest dry weight, fertility percentage and sink size under low N among the cultivars examined.
- Taxon
- riceOryza sativae0
- Material
- Akenohoshie5
- Treatment
- LN conditione5
- Outcome
- DW, fertility % and sink sizee5
- Direction
- higheste5
- Comparator
- the cultivars examinede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e5“Among the cultivars examined, Akenohoshi showed the highest DW, fertility % and sink size under the LN condition, leading the highest grain weight”
Claim · model-written summary
Akenohoshi had the highest grain weight under low N among the cultivars examined.
- Taxon
- riceOryza sativae0
- Material
- Akenohoshie5
- Treatment
- LN conditione5
- Outcome
- grain weighte5
- Direction
- higheste5
- Comparator
- the cultivars examinede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e5“Among the cultivars examined, Akenohoshi showed the highest DW, fertility % and sink size under the LN condition, leading the highest grain weight”
Claim · model-written summary
Akenohoshi showed the smallest decreases caused by limited N supply among the six rice cultivars.
- Taxon
- riceOryza sativae0
- Material
- Akenohoshie6
- Treatment
- limited N supplye6
- Outcome
- magnitudes of these decreasese6
- Direction
- smalleste6
- Comparator
- the six cultivarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e1“At maturity, N limitation caused significant decreases in aboveground dry weight (DW), DW increased during heading to maturity (DW), grain weight, panicle number per plant, fertility % and sink size in the six cultivars”
e6“the magnitudes of these decreases caused by limited N supply were smallest in Akenohoshi”
Claim · model-written summary
Akenohoshi is suggested as a breeding material for improving adaptability of rice to low-N environments.
- Taxon
- riceOryza sativae0
- Material
- Akenohoshie7
- Outcome
- improvement of adaptability to LN environmente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of limited nitrogen (N) supply on dry matter and grain productions were investigated in the pot-grown six rice cultivars”
e7“It is suggested that Akenohoshi is a breeding material useful for the improvement of adaptability to LN environment”
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