Abstract
A hydroponic experiment was conducted to study the effects of applying 100% NO3- -N, 100% NH4+ -N, and 75% NO3- -N+25% NH4+ -N on the nitrogen metabolism and the nitrate reductase (NR) and glutamine synthetase (GS) gene expression of cherry tomato during its fruit development. Applying 75% NO3- -N+25% NH4+ -N slightly increased the single fruit mass, and increased the fruit NH4+ -N, total amino acid, and total N contents and N accumulation significantly, compared with applying 100% NO3- -N. In treatments 100% NO3- -N and 75% NO3- -N + 25% NH4+ -N, the fruit NR activity and its gene expression had no significant difference, but were higher than those in treatment 100% NH4+ -N. The fruit GS activity was significantly higher in treatment 75% NO3--N+25% NH4+ -N than in treatment 100% NO3- -N. In the three treatments, isozyme GS1 (Cytosolic type GS) and GS2 (Chloroplast type GS) expression was inconsistent with GS activity, suggesting that the effects of applied N on GS activity could be mainly reflected at posttranscriptional level.
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Claims 9
Claim · model-written summary
Applying 75% NO3- -N + 25% NH4+ -N slightly increased single fruit mass of cherry tomato compared with 100% NO3- -N.
- Taxon
- cherry tomato
Solanum lycopersicum var. cerasiformet0 - Treatment
- 75% NO3- -N+25% NH4+ -Ne1
- Outcome
- single fruit masse1
- Direction
- slightly increasede1
- Comparator
- 100% NO3- -Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e1“Applying 75% NO3- -N+25% NH4+ -N slightly increased the single fruit mass, and increased the fruit NH4+ -N, total amino acid, and total N contents and N accumulation significantly, compared with applying 100% NO3- -N”
Claim · model-written summary
Applying 75% NO3- -N+25% NH4+ -N significantly increased fruit NH4+ -N, total amino acid and total N contents of cherry tomato compared with 100% NO3- -N.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 75% NO3- -N+25% NH4+ -Ne1
- Outcome
- fruit NH4+ -N, total amino acid, and total N contentse1
- Direction
- increasede1
- Comparator
- 100% NO3- -Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e1“Applying 75% NO3- -N+25% NH4+ -N slightly increased the single fruit mass, and increased the fruit NH4+ -N, total amino acid, and total N contents and N accumulation significantly, compared with applying 100% NO3- -N”
Claim · model-written summary
Applying 75% NO3- -N+25% NH4+ -N significantly increased N accumulation in cherry tomato fruit compared with 100% NO3- -N.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 75% NO3- -N+25% NH4+ -Ne1
- Outcome
- N accumulatione1
- Direction
- increasede1
- Comparator
- 100% NO3- -Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e1“Applying 75% NO3- -N+25% NH4+ -N slightly increased the single fruit mass, and increased the fruit NH4+ -N, total amino acid, and total N contents and N accumulation significantly, compared with applying 100% NO3- -N”
Claim · model-written summary
Fruit NR activity and its gene expression did not differ significantly between 75% NO3- -N + 25% NH4+ -N and 100% NO3- -N in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 75% NO3- -N + 25% NH4+ -Ne2
- Outcome
- fruit NR activitye2
- Direction
- no significant differencee2
- Comparator
- 100% NO3- -Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e2“In treatments 100% NO3- -N and 75% NO3- -N + 25% NH4+ -N, the fruit NR activity and its gene expression had no significant difference, but were higher than those in treatment 100% NH4+ -N”
Claim · model-written summary
Fruit NR activity and its gene expression under 100% NO3- -N were higher than under 100% NH4+ -N in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 100% NO3- -Ne2
- Outcome
- fruit NR activitye2
- Direction
- highere2
- Comparator
- 100% NH4+ -Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e2“In treatments 100% NO3- -N and 75% NO3- -N + 25% NH4+ -N, the fruit NR activity and its gene expression had no significant difference, but were higher than those in treatment 100% NH4+ -N”
Claim · model-written summary
Fruit NR activity and its gene expression under 75% NO3- -N + 25% NH4+ -N were higher than under 100% NH4+ -N in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 75% NO3- -N + 25% NH4+ -Ne2
- Outcome
- fruit NR activitye2
- Direction
- highere2
- Comparator
- 100% NH4+ -Ne2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e2“In treatments 100% NO3- -N and 75% NO3- -N + 25% NH4+ -N, the fruit NR activity and its gene expression had no significant difference, but were higher than those in treatment 100% NH4+ -N”
Claim · model-written summary
Fruit GS activity was significantly higher under 75% NO3--N+25% NH4+ -N than under 100% NO3- -N in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- 75% NO3--N+25% NH4+ -Ne3
- Outcome
- fruit GS activitye3
- Direction
- significantly highere3
- Comparator
- 100% NO3- -Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e3“The fruit GS activity was significantly higher in treatment 75% NO3--N+25% NH4+ -N than in treatment 100% NO3- -N”
Claim · model-written summary
GS1 and GS2 isozyme expression was inconsistent with GS activity across the three nitrogen treatments in cherry tomato.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Gene
- GS1 (Cytosolic type GS) and GS2 (Chloroplast type GS)e4
- Outcome
- expressione4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e4“In the three treatments, isozyme GS1 (Cytosolic type GS) and GS2 (Chloroplast type GS) expression was inconsistent with GS activity”
Claim · model-written summary
The effects of applied N on GS activity in cherry tomato could be mainly reflected at the posttranscriptional level.
- Taxon
- cherry tomatoSolanum lycopersicum var. cerasiformet0
- Treatment
- applied Ne5
- Outcome
- GS activitye5
- Qualifier
- posttranscriptional levele5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cherry tomato nitrogen metabolism”
e5“suggesting that the effects of applied N on GS activity could be mainly reflected at posttranscriptional level”
The same questions in other papers
ammonium · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
3 in the opposite direction
- negative
- no effect
- negative
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.