Abstract
Stem non-structural carbohydrates (NSCs) and its relationship with yield formation was investigated under low nitrogen (LN) and normal nitrogen (NN) treatments, using 46 recombinant inbred lines from Zhenshan 97 × Minghui 63 (Oryza sativa). Apparent contribution of transferred NSC to grain yield (AC(NSC) ) ranged from approximately 1 to 28% under LN and from 1 to 15% under NN. Concentration and total mass of NSC in stem (TM(NSC) ) at heading, apparent transferred mass of NSC (ATM(NSC) ) and AC(NSC) were larger under LN compared with NN. However, there was no significant difference in the apparent ratio of transferred NSC from stems to grain (AR(NSC) ). ATM(NSC) was positively correlated with grain yield, 1000-grain weight and AC(NSC) under both nitrogen levels, whereas AR(NSC) was highly correlated with harvest index and AC(NSC) . Leaf area contributed more strongly to grain yield compared with ATM(NSC) under both LN and NN. ATM(NSC) showed larger direct effects on grain yield under LN compared with NN. TM(NSC) at heading, small vascular bundles (SVBs) and spikelets per m(2) under LN had positive direct effects on ATM(NSC) . SVB and spikelets per m(2) under LN had larger and positive direct effects, and large vascular bundles had negative direct effects on AR(NSC) . TM(NSC) at heading and SVB under LN had positive direct effects on AC(NSC) . In brief, LN supply increased stem NSC accumulation and translocation to developing grain. Components of the source-sink-flow system showed different effects on NSC translocation and contribution to yield formation, depending on genotype and nitrogen level.
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Claims 14
Claim · model-written summary
Transferred stem NSC contributed approximately 1 to 28% of grain yield under low nitrogen.
- Taxon
- Oryza sativa
Oryza sativat0 - Treatment
- LNe0
- Outcome
- Apparent contribution of transferred NSC to grain yielde0
- Value
- 1 to 28%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent contribution of transferred NSC to grain yield (AC(NSC) ) ranged from approximately 1 to 28% under LN and from 1 to 15% under NN.”
t0“Oryza sativa”
Claim · model-written summary
Transferred stem NSC contributed 1 to 15% of grain yield under normal nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- NNe0
- Outcome
- Apparent contribution of transferred NSC to grain yielde0
- Value
- 1 to 15%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent contribution of transferred NSC to grain yield (AC(NSC) ) ranged from approximately 1 to 28% under LN and from 1 to 15% under NN.”
t0“Oryza sativa”
Claim · model-written summary
At heading, stem NSC concentration and total mass were larger under low nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- steme0
- Treatment
- LNe0
- Outcome
- Concentration and total mass of NSC in steme0
- Direction
- largere0
- Comparator
- NNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration and total mass of NSC in stem (TM(NSC) ) at heading, apparent transferred mass of NSC (ATM(NSC) ) and AC(NSC) were larger under LN compared with NN.”
t0“Oryza sativa”
Claim · model-written summary
Transferred NSC mass was larger under low nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- LNe0
- Outcome
- apparent transferred mass of NSCe0
- Direction
- largere0
- Comparator
- NNe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration and total mass of NSC in stem (TM(NSC) ) at heading, apparent transferred mass of NSC (ATM(NSC) ) and AC(NSC) were larger under LN compared with NN.”
t0“Oryza sativa”
Claim · model-written summary
The apparent contribution of transferred NSC to grain yield was larger under low nitrogen.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentration and total mass of NSC in stem (TM(NSC) ) at heading, apparent transferred mass of NSC (ATM(NSC) ) and AC(NSC) were larger under LN compared with NN.”
t0“Oryza sativa”
Claim · model-written summary
The apparent ratio of stem NSC transfer to grain did not differ significantly between nitrogen treatments.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- LNt1
- Outcome
- apparent ratio of transferred NSC from stems to graine0
- Direction
- no significant differencee0
- Comparator
- NNt1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, there was no significant difference in the apparent ratio of transferred NSC from stems to grain (AR(NSC) ).”
t0“Oryza sativa”
t1“were larger under LN compared with NN.”
Claim · model-written summary
Transferred NSC mass was positively correlated with grain yield, 1000-grain weight and NSC contribution.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- ATM(NSC)e0
- Outcome
- grain yield, 1000-grain weight and AC(NSC)e0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ATM(NSC) was positively correlated with grain yield, 1000-grain weight and AC(NSC) under both nitrogen levels”
t0“Oryza sativa”
Claim · model-written summary
The NSC transfer ratio was highly correlated with harvest index and NSC contribution.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- AR(NSC)e0
- Outcome
- harvest index and AC(NSC)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AR(NSC) was highly correlated with harvest index and AC(NSC) .”
t0“Oryza sativa”
Claim · model-written summary
Leaf area contributed more strongly to grain yield than transferred NSC mass.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- Leaf areae0
- Outcome
- grain yielde0
- Direction
- more stronglye0
- Comparator
- ATM(NSC)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf area contributed more strongly to grain yield compared with ATM(NSC) under both LN and NN.”
t0“Oryza sativa”
Claim · model-written summary
Transferred NSC mass had larger direct effects on grain yield under low nitrogen.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ATM(NSC) showed larger direct effects on grain yield under LN compared with NN.”
t0“Oryza sativa”
Claim · model-written summary
Stem NSC mass at heading, small vascular bundles and spikelets had positive direct effects on transferred NSC mass under low nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- small vascular bundlese0
- Outcome
- ATM(NSC)e0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TM(NSC) at heading, small vascular bundles (SVBs) and spikelets per m(2) under LN had positive direct effects on ATM(NSC) .”
t0“Oryza sativa”
Claim · model-written summary
Small vascular bundles and spikelets had larger positive direct effects on NSC transfer ratio under low nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- SVBe0
- Outcome
- AR(NSC)e0
- Direction
- larger and positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SVB and spikelets per m(2) under LN had larger and positive direct effects, and large vascular bundles had negative direct effects on AR(NSC) .”
t0“Oryza sativa”
Claim · model-written summary
Large vascular bundles had negative direct effects on NSC transfer ratio.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- large vascular bundlese0
- Outcome
- AR(NSC)e0
- Direction
- negativee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SVB and spikelets per m(2) under LN had larger and positive direct effects, and large vascular bundles had negative direct effects on AR(NSC) .”
t0“Oryza sativa”
Claim · model-written summary
Stem NSC mass at heading and small vascular bundles had positive direct effects on NSC contribution under low nitrogen.
- Taxon
- Oryza sativaOryza sativat0
- Organ / stage
- SVBe0
- Outcome
- AC(NSC)e0
- Direction
- positivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TM(NSC) at heading and SVB under LN had positive direct effects on AC(NSC) .”
t0“Oryza sativa”
The same questions in other papers
nitrogen · molecular: metabolites · Oryza sativa (rice)Positive and negative results
85 papers in the same direction as this paper · 34 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
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See all 121 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.