Abstract
The effects of nitrogen deficiency on the growth and polyamine levels of suspensioncultured rice cells were investigated. Nitrogen deficiency markedly inhibited cell growth and resulted in lower levels of putrescine, spermidine and spermine than in the control culture supplied with nitrogen. The growth inhibition of rice cells induced by nitrogen deficiency could be recovered by the addition of a mixture of amino acids (glycine, L-aspartic acid, L-glutamic acid and L-arginine), but not by polyamines (putrescine, spermidine or spermine). Our results indicate that the decline of polyamine levels is not a factor causing growth inhibition of suspension-cultured rice cells under nitrogen deficiency.
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Claims 5
Claim · model-written summary
Nitrogen deficiency markedly inhibited growth of suspension-cultured rice cells relative to nitrogen-supplied control cultures.
- Taxon
- rice
Oryza sativat0 - Treatment
- Nitrogen deficiencye0
- Outcome
- cell growthe0
- Direction
- inhibitede0
- Comparator
- control culture supplied with nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen deficiency markedly inhibited cell growth and resulted in lower levels of putrescine, spermidine and spermine than in the control culture supplied with nitrogen.”
t0“The decrease in polyamine levels is not associated with growth inhibition in suspension-cultured rice cells under nitrogen deficiency”
Claim · model-written summary
Nitrogen deficiency lowered putrescine, spermidine, and spermine levels in rice cells relative to nitrogen-supplied controls.
- Taxon
- riceOryza sativat0
- Treatment
- Nitrogen deficiencye0
- Outcome
- levels of putrescine, spermidine and sperminee0
- Direction
- lowere0
- Comparator
- control culture supplied with nitrogene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen deficiency markedly inhibited cell growth and resulted in lower levels of putrescine, spermidine and spermine than in the control culture supplied with nitrogen.”
t0“The decrease in polyamine levels is not associated with growth inhibition in suspension-cultured rice cells under nitrogen deficiency”
Claim · model-written summary
Adding a mixture of amino acids recovered rice cell growth inhibited by nitrogen deficiency.
- Taxon
- riceOryza sativae0
- Treatment
- addition of a mixture of amino acidse0
- Outcome
- growth inhibition of rice cellse0
- Direction
- recoverede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth inhibition of rice cells induced by nitrogen deficiency could be recovered by the addition of a mixture of amino acids (glycine, L-aspartic acid, L-glutamic acid and L-arginine), but not by polyamines (putrescine, spermidine or spermine).”
Claim · model-written summary
Adding polyamines did not recover rice cell growth inhibited by nitrogen deficiency.
- Taxon
- riceOryza sativae0
- Treatment
- polyamines (putrescine, spermidine or spermine)e0
- Outcome
- growth inhibition of rice cellse0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth inhibition of rice cells induced by nitrogen deficiency could be recovered by the addition of a mixture of amino acids (glycine, L-aspartic acid, L-glutamic acid and L-arginine), but not by polyamines (putrescine, spermidine or spermine).”
Claim · model-written summary
The authors conclude that decreased polyamine levels do not cause growth inhibition of rice cells under nitrogen deficiency.
- Taxon
- riceOryza sativae0
- Outcome
- growth inhibitione0
- Qualifier
- decline of polyamine levels is not a factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results indicate that the decline of polyamine levels is not a factor causing growth inhibition of suspension-cultured rice cells under nitrogen deficiency.”
The same questions in other papers
putrescine · disease · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
spermine · disease · Oryza sativa (rice)Positive and negative results
2 in the opposite direction
- positive
- positive
spermidine · disease · Oryza sativa (rice)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- negative
- negative
507 papers more in this group
See all 511 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.