Abstract
Effects of anoxia on the levels of free-amino acids were investigated in the coleoptiles of rice (Oryza sativa L.) seedlings. Rice coleoptiles are able to grow in extremely low oxygen conditions. Anoxic stress increased the concentration of total free-amino acids in the coleoptiles. Alanine (Ala) and γ-aminobutyric acid (Gaba) were the main amino acids accumulated. After 48 h, Ala and Gaba concentrations in anoxic coleoptiles were 3.4- and 11.2-fold greater than those in non-stressed coleoptiles, respectively. Ala and Gaba represented 19 and 23 % of the amino acid pool in anoxic coleoptiles, respectively. Submergence stress also increased Ala and Gaba concentrations in rice coleoptiles. Since Ala and Gaba are bio-compatible solutes and their accumulation is known to stabilize osmotic potential and/or cytoplasmic pH in plant cells, these stress-induced amino acids may allow rice coleoptiles to make biochemical adjustment that enable them to cope with the stress conditions. Therefore, the ability to increase the concentrations of Ala and Gaba may be important for anoxic and submergence stress tolerance of rice seedlings.
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Claims 10
Claim · model-written summary
Rice coleoptiles can grow in extremely low oxygen.
- Taxon
- Rice
Oryza sativae0 - Organ / stage
- coleoptilese0
- Outcome
- grow in extremely low oxygen conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice coleoptiles are able to grow in extremely low oxygen conditions”
Claim · model-written summary
Anoxic stress increased total free amino acids in rice coleoptiles.
- Taxon
- riceOryza sativat0
- Organ / stage
- coleoptilese0
- Treatment
- Anoxic stresse0
- Outcome
- concentration of total free-amino acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Anoxic stress increased the concentration of total free-amino acids in the coleoptiles”
t0“Rice”
Claim · model-written summary
Alanine was a main accumulated amino acid under anoxia.
- Taxon
- RiceOryza sativat0
- Organ / stage
- coleoptilest0
- Outcome
- Alanine (Ala)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alanine (Ala) and γ-aminobutyric acid (Gaba) were the main amino acids accumulated”
t0“Rice Coleoptiles”
Claim · model-written summary
GABA was a main accumulated amino acid under anoxia.
- Taxon
- RiceOryza sativat0
- Organ / stage
- coleoptilest0
- Outcome
- γ-aminobutyric acid (Gaba)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alanine (Ala) and γ-aminobutyric acid (Gaba) were the main amino acids accumulated”
t0“Rice Coleoptiles”
Claim · model-written summary
At 48 hours alanine in anoxic coleoptiles was 3.4-fold above non-stressed coleoptiles.
- Taxon
- RiceOryza sativat0
- Treatment
- anoxice0
- Outcome
- Alae0
- Direction
- greatere0
- Value
- 3.4-e0
- Qualifier
- After 48 he0
- Comparator
- non-stressed coleoptilese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 48 h, Ala and Gaba concentrations in anoxic coleoptiles were 3.4- and 11.2-fold greater than those in non-stressed coleoptiles, respectively”
t0“Rice”
Claim · model-written summary
At 48 hours GABA in anoxic coleoptiles was 11.2-fold above non-stressed coleoptiles.
- Taxon
- RiceOryza sativat0
- Treatment
- anoxice0
- Outcome
- Gabae0
- Direction
- greatere0
- Value
- 11.2-folde0
- Qualifier
- After 48 he0
- Comparator
- non-stressed coleoptilese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 48 h, Ala and Gaba concentrations in anoxic coleoptiles were 3.4- and 11.2-fold greater than those in non-stressed coleoptiles, respectively”
t0“Rice”
Claim · model-written summary
Alanine comprised 19% of the amino acid pool in anoxic coleoptiles.
- Taxon
- RiceOryza sativat0
- Organ / stage
- coleoptilese0
- Outcome
- Alae0
- Value
- 19e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ala and Gaba represented 19 and 23 % of the amino acid pool in anoxic coleoptiles, respectively”
t0“Rice”
Claim · model-written summary
GABA comprised 23% of the amino acid pool in anoxic coleoptiles.
- Taxon
- RiceOryza sativat0
- Organ / stage
- coleoptilese0
- Outcome
- Gabae0
- Value
- 23 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ala and Gaba represented 19 and 23 % of the amino acid pool in anoxic coleoptiles, respectively”
t0“Rice”
Claim · model-written summary
Submergence increased alanine in rice coleoptiles.
- Taxon
- riceOryza sativae0
- Treatment
- Submergence stresse0
- Outcome
- Alae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Submergence stress also increased Ala and Gaba concentrations in rice coleoptiles”
Claim · model-written summary
Submergence increased GABA in rice coleoptiles.
- Taxon
- riceOryza sativae0
- Treatment
- Submergence stresse0
- Outcome
- Gabae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Submergence stress also increased Ala and Gaba concentrations in rice coleoptiles”
The same questions in other papers
flooding · molecular: metabolites · Oryza sativa (rice)Positive and negative results
24 papers in the same direction as this paper · 21 in the opposite direction
- positive
- no effect
- no effect
42 papers more in this group
See all 46 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.