Abstract
Salt-tolerant Pokkali rice plants accumulate higher polyamines (PAs) such as spermidine (Spd) and spermine (Spm) in response to salinity stress, while the sensitive cultivarM-1-48 is unable to maintain high titres of these PAs under similar conditions. The effects of the triamine Spd and the tetramine Spm on physiological and biochemical changes in 12-day-old rice seedlings were investigated during salinity stress to determine whether they could protect the sensitive plants from stress effects. At physiological concentrations Spd and Spm significantly prevented the leakage of electrolytes and amino acids from roots and shoots induced by salinity stress. To different degrees they also prevented chlorophyll loss, inhibition of photochemical reactions of photosynthesis as well as downregulation of chloroplast-encoded genes like psbA, psbB, psbE and rbcL, indicating a positive correlation between salt tolerance and accumulation of higher PAs in rice. The inhibitory effect of salinity stress and its reversal by exogenous PAs were more pronounced in the salt-sensitiveM-1-48 plants than in the tolerant Pokkali plants.
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Claims 8
Claim · model-written summary
Pokkali rice accumulated higher spermidine and spermine under salinity stress.
- Taxon
- rice
Oryza sativae0 - Material
- Pokkalie0
- Treatment
- salinity stresse0
- Outcome
- higher polyamines (PAs) such as spermidine (Spd) and spermine (Spm)e0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant Pokkali rice plants accumulate higher polyamines (PAs) such as spermidine (Spd) and spermine (Spm) in response to salinity stress, while the sensitive cultivarM-1-48 is unable to maintain high titres of these PAs under similar conditions.”
Claim · model-written summary
Sensitive M-1-48 did not maintain high polyamine titres under salinity stress.
- Taxon
- riceOryza sativae0
- Material
- M-1-48e0
- Treatment
- salinity stresse0
- Outcome
- high titres of these PAse0
- Direction
- unable to maintaine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-tolerant Pokkali rice plants accumulate higher polyamines (PAs) such as spermidine (Spd) and spermine (Spm) in response to salinity stress, while the sensitive cultivarM-1-48 is unable to maintain high titres of these PAs under similar conditions.”
Claim · model-written summary
Spermidine and spermine significantly prevented electrolyte and amino acid leakage from salinity-stressed roots and shoots.
- Taxon
- riceOryza sativat0
- Organ / stage
- roots and shootse0
- Treatment
- Spd and Spme0
- Outcome
- leakage of electrolytes and amino acidse0
- Direction
- preventede0
- Comparator
- salinity stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At physiological concentrations Spd and Spm significantly prevented the leakage of electrolytes and amino acids from roots and shoots induced by salinity stress.”
t0“rice (Oryza sativa) plants”
Claim · model-written summary
Exogenous polyamines prevented chlorophyll loss under salinity stress.
- Taxon
- riceOryza sativae0
- Treatment
- theye0
- Outcome
- chlorophyll losse0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To different degrees they also prevented chlorophyll loss, inhibition of photochemical reactions of photosynthesis as well as downregulation of chloroplast-encoded genes like psbA, psbB, psbE and rbcL, indicating a positive correlation between salt tolerance and accumulation of higher PAs in rice.”
Claim · model-written summary
Exogenous polyamines prevented inhibition of photosynthetic photochemical reactions under salinity stress.
- Taxon
- riceOryza sativae0
- Treatment
- theye0
- Outcome
- inhibition of photochemical reactions of photosynthesise0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To different degrees they also prevented chlorophyll loss, inhibition of photochemical reactions of photosynthesis as well as downregulation of chloroplast-encoded genes like psbA, psbB, psbE and rbcL, indicating a positive correlation between salt tolerance and accumulation of higher PAs in rice.”
Claim · model-written summary
Exogenous polyamines prevented downregulation of chloroplast-encoded genes.
- Taxon
- riceOryza sativae0
- Treatment
- theye0
- Gene
- psbA, psbB, psbE and rbcLe0
- Outcome
- downregulation of chloroplast-encoded genese0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To different degrees they also prevented chlorophyll loss, inhibition of photochemical reactions of photosynthesis as well as downregulation of chloroplast-encoded genes like psbA, psbB, psbE and rbcL, indicating a positive correlation between salt tolerance and accumulation of higher PAs in rice.”
Claim · model-written summary
Salt tolerance correlated positively with higher polyamine accumulation in rice.
- Taxon
- riceOryza sativae0
- Compound
- higher PAse0
- Outcome
- salt tolerancee0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To different degrees they also prevented chlorophyll loss, inhibition of photochemical reactions of photosynthesis as well as downregulation of chloroplast-encoded genes like psbA, psbB, psbE and rbcL, indicating a positive correlation between salt tolerance and accumulation of higher PAs in rice.”
Claim · model-written summary
Salinity inhibition and reversal by exogenous polyamines were more pronounced in sensitive M-1-48 than tolerant Pokkali.
- Taxon
- riceOryza sativat0
- Material
- M-1-48e0
- Outcome
- inhibitory effect of salinity stress and its reversal by exogenous PAse0
- Direction
- more pronouncede0
- Comparator
- Pokkalie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibitory effect of salinity stress and its reversal by exogenous PAs were more pronounced in the salt-sensitiveM-1-48 plants than in the tolerant Pokkali plants.”
t0“rice (Oryza sativa) plants”
The same questions in other papers
spermidine · molecular: metabolites · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- positive
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See all 9 papers →spermine · molecular: metabolites · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.