Abstract
Improving vegetable yield and optimizing its quality through nutrient management have long been central to plant nutrition and horticultural science. Copper (Cu) is recognized as an essential trace element that promotes plant growth and development. However, the mechanisms by which Cu influences nitrogen (N) metabolism remain largely unknown, with limited studies exploring the interaction between Cu and varying nitrate-to-ammonium (nitrate/ammonium) ratios. In this study, Chinese cabbage was exposed to two Cu concentrations (0 and 0.02 mg L -1 ) in combination with three nitrate/ammonium ratios (10/90, 50/50, and 90/10) under hydroponic conditions. The results showed that Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots. Additionally, Cu treatment decreased nitrate and free amino acid contents, as well as the expression of nitrate transporters NRT1.1 and NRT2.1 in roots while increasing these four parameters in shoots. Additionally, these effects were significantly modulated by the nitrate/ammonium ratios. In conclusion, Cu may facilitate nitrate transportation, enhance nitrate reduction, promote ammonium assimilation, and influence the transformation of organic N compounds, highlighting its potential role in improving N metabolism in Chinese cabbage.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Copper increased Chinese cabbage biomass.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensist0 - Treatment
- Cu applicatione0
- Outcome
- plant biomasse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased nitrate reductase and glutamine synthetase activities.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- Cu applicatione0
- Gene
- nitrate reductase (NR) and glutamine synthetase (GS)e0
- Outcome
- nitrate reductase (NR) and glutamine synthetase (GS) enzyme activitiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased NIA and Gln2 gene expression.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- Cu applicatione0
- Gene
- NR ( NIA ) and GS2 ( Gln2 )e0
- Outcome
- expression of NR ( NIA ) and GS2 ( Gln2 ) genese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased shoot N content.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- shootse0
- Treatment
- Cu applicatione0
- Outcome
- N contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased root N content.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- rootse0
- Treatment
- Cu applicatione0
- Outcome
- N contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu application increased plant biomass, nitrate reductase (NR) and glutamine synthetase (GS) enzyme activities, the expression of NR ( NIA ) and GS2 ( Gln2 ) genes, and N content in both shoots and roots”
t0“Chinese cabbage”
Claim · model-written summary
Copper decreased nitrate and free amino acid content in roots.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- rootse0
- Treatment
- Cu treatmente0
- Outcome
- nitrate and free amino acid contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu treatment decreased nitrate and free amino acid contents, as well as the expression of nitrate transporters NRT1.1 and NRT2.1 in roots while increasing these four parameters in shoots”
t0“Chinese cabbage”
Claim · model-written summary
Copper decreased NRT1.1 and NRT2.1 expression in roots.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- rootse0
- Treatment
- Cu treatmente0
- Gene
- NRT1.1 and NRT2.1e0
- Outcome
- expression of nitrate transporters NRT1.1 and NRT2.1e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu treatment decreased nitrate and free amino acid contents, as well as the expression of nitrate transporters NRT1.1 and NRT2.1 in roots while increasing these four parameters in shoots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased nitrate and free amino acid content in shoots.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- shootse0
- Treatment
- Cu treatmente0
- Outcome
- nitrate and free amino acid contentse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu treatment decreased nitrate and free amino acid contents, as well as the expression of nitrate transporters NRT1.1 and NRT2.1 in roots while increasing these four parameters in shoots”
t0“Chinese cabbage”
Claim · model-written summary
Copper increased NRT1.1 and NRT2.1 expression in shoots.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Organ / stage
- shootse0
- Treatment
- Cu treatmente0
- Gene
- NRT1.1 and NRT2.1e0
- Outcome
- expression of nitrate transporters NRT1.1 and NRT2.1e0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu treatment decreased nitrate and free amino acid contents, as well as the expression of nitrate transporters NRT1.1 and NRT2.1 in roots while increasing these four parameters in shoots”
t0“Chinese cabbage”
Claim · model-written summary
Nitrate/ammonium ratios significantly modulated the copper effects.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- nitrate/ammonium ratiose0
- Outcome
- these effectse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these effects were significantly modulated by the nitrate/ammonium ratios”
t0“Chinese cabbage”
Claim · model-written summary
Authors infer copper may facilitate nitrate transport, reduction, ammonium assimilation and organic N transformation.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- Cue0
- Outcome
- nitrate transportation, enhance nitrate reduction, promote ammonium assimilatione0
- Qualifier
- transformation of organic N compoundse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cu may facilitate nitrate transportation, enhance nitrate reduction, promote ammonium assimilation, and influence the transformation of organic N compounds”
t0“Chinese cabbage”
The same questions in other papers
copper atom · nutrient: content · Brassica rapa (field mustard)Results differ
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
copper atom · growth · Brassica rapa (field mustard)Results differ
3 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
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.