Abstract
Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production. This study was carried out to induce chilling tolerance in rice (cv. Hashemi) by seed priming with salicylic acid and to unravel the physiological and biochemical processes at early growth stage. Seeds were soaked in 0, 20, 50 and 100 mg.l-1 salicylic acid solutions for 24 hours and then dried back to the original moisture content and were sown in three temperatures (28°C as normal, 12°C and 8°C as chilling stress). Sharp decrease in photosynthesis pigments was observed under low temperature in rice seedling leaves in compared to control though chilling stress effects on photosynthetic pigments was mitigated by seed priming with salicylic acid. Maximum decrease in protein contents (35%) was observed in 8°C though it was 4% for 12°C. seed priming with salicylic acid improved protein contents in all concentrations. Soluble sugars content increased with decreasing in temperature as it was 33% and 41% in 12 and 8°C, respectively. Maximum soluble sugars accumulation (34.41 mg.g-1 fw) was recorded in seedling raised from primed seeds with 100 mg.l-1 SA at 12°C. Indeed, seed priming with salicylic acid via increasing in photosynthesis pigments, proline, soluble sugars and protein content could decrease low temperature harmful effects and therefore increase rice seedling root and shoot growth.
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Claims 9
Claim · model-written summary
Low temperature decreased photosynthetic pigments in rice seedling leaves compared with control.
- Taxon
- rice
Oryza sativae0 - Treatment
- low temperaturee1
- Outcome
- photosynthesis pigmentse1
- Direction
- decreasee1
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e1“Sharp decrease in photosynthesis pigments was observed under low temperature in rice seedling leaves in compared to control though chilling stress effects on photosynthetic pigments was mitigated by seed priming with salicylic acid”
Claim · model-written summary
Seed priming with salicylic acid mitigated the chilling-stress effect on photosynthetic pigments in rice seedlings.
- Taxon
- riceOryza sativae0
- Treatment
- seed priming with salicylic acide1
- Outcome
- photosynthetic pigmentse1
- Direction
- mitigatede1
- Comparator
- chilling stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e1“Sharp decrease in photosynthesis pigments was observed under low temperature in rice seedling leaves in compared to control though chilling stress effects on photosynthetic pigments was mitigated by seed priming with salicylic acid”
Claim · model-written summary
The maximum decrease in protein content, 35%, occurred at 8°C in rice seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e2“Maximum decrease in protein contents (35%) was observed in 8°C though it was 4% for 12°C”
Claim · model-written summary
Protein content decreased by 4% at 12°C in rice seedlings.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e2“Maximum decrease in protein contents (35%) was observed in 8°C though it was 4% for 12°C”
Claim · model-written summary
Seed priming with salicylic acid improved protein content in rice seedlings at all concentrations.
- Taxon
- riceOryza sativae0
- Treatment
- seed priming with salicylic acide3
- Outcome
- protein contentse3
- Direction
- improvede3
- Qualifier
- in all concentrationse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e3“seed priming with salicylic acid improved protein contents in all concentrations”
Claim · model-written summary
Soluble sugar content increased to 33% with decreasing temperature in rice seedlings at 12°C.
- Taxon
- riceOryza sativae0
- Treatment
- decreasing in temperaturee4
- Outcome
- Soluble sugars contente4
- Direction
- increasede4
- Value
- 33%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e4“Soluble sugars content increased with decreasing in temperature as it was 33% and 41% in 12 and 8°C, respectively”
Claim · model-written summary
Soluble sugar content increased to 41% with decreasing temperature in rice seedlings at 8°C.
- Taxon
- riceOryza sativae0
- Treatment
- decreasing in temperaturee4
- Outcome
- Soluble sugars contente4
- Direction
- increasede4
- Value
- 41%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e4“Soluble sugars content increased with decreasing in temperature as it was 33% and 41% in 12 and 8°C, respectively”
Claim · model-written summary
Maximum soluble sugar accumulation, 34.41 mg.g-1 fw, occurred in rice seedlings from seeds primed with 100 mg.l-1 salicylic acid at 12°C.
- Taxon
- riceOryza sativae0
- Treatment
- primed seeds with 100 mg.l-1 SAe5
- Outcome
- soluble sugars accumulatione5
- Direction
- Maximume5
- Value
- 34.41 mg.g-1 fwe5
- Qualifier
- 12°Ce5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e5“Maximum soluble sugars accumulation (34.41 mg.g-1 fw) was recorded in seedling raised from primed seeds with 100 mg.l-1 SA at 12°C”
Claim · model-written summary
Seed priming with salicylic acid, via higher pigments, proline, soluble sugars and protein, could reduce low-temperature harm and increase rice seedling root and shoot growth.
- Taxon
- riceOryza sativae6
- Treatment
- seed priming with salicylic acide6
- Compound
- prolinee6
- Outcome
- root and shoot growthe6
- Qualifier
- could decrease low temperature harmful effectse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature is one of the major environmental limiting factors that affect rice (Oryza sativa L.) production”
e6“seed priming with salicylic acid via increasing in photosynthesis pigments, proline, soluble sugars and protein content could decrease low temperature harmful effects and therefore increase rice seedling root and shoot growth”
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See all 19 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.