Abstract
The production of both ABA and H₂O₂ is induced by drought and can act as signals under stress conditions. We investigated the relationships between ABA, H₂O₂ and catalase (CAT) in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment. As a key gene in ABA biosynthesis, OsNCED3 was significantly induced in rice by water stress treatment and such induction preceded the rapid increase in ABA. Water stress inhibited the expression of CATA and CATC but substantially enhanced the expression of CATB. Exogenously applied ABA promoted the expression of CATB also and inhibited the expression of CATC in a concentration-dependent manner. When ABA production was inhibited by using ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstate, expression of CATB was also subdued while CATC was enhanced under the water stress. Accumulation of H₂O₂ was also reduced when endogenous ABA production was inhibited and showed a correlation with the total activity of catalases. Our results suggest that water stress-induced ABA prevents the excessive accumulation of H₂O₂, through the induction of the expression of CATB gene during water stress.
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Claims 11
Claim · model-written summary
Water stress significantly induced OsNCED3, a key ABA biosynthesis gene, in rice.
- Taxon
- rice
Oryza sativae1 - Treatment
- water stress treatmente1
- Gene
- OsNCED3e1
- Outcome
- OsNCED3e1
- Direction
- inducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“As a key gene in ABA biosynthesis, OsNCED3 was significantly induced in rice by water stress treatment and such induction preceded the rapid increase in ABA”
Claim · model-written summary
Induction of OsNCED3 under water stress preceded a rapid increase in ABA in rice.
- Taxon
- riceOryza sativae1
- Gene
- OsNCED3e1
- Outcome
- ABAe1
- Direction
- increasee1
- Qualifier
- such induction preceded the rapid increase in ABAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“As a key gene in ABA biosynthesis, OsNCED3 was significantly induced in rice by water stress treatment and such induction preceded the rapid increase in ABA”
Claim · model-written summary
Water stress inhibited the expression of CATA and CATC in rice leaves.
- Taxon
- riceOryza sativae0
- Treatment
- Water stresse2
- Outcome
- expression of CATA and CATCe2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e2“Water stress inhibited the expression of CATA and CATC but substantially enhanced the expression of CATB”
Claim · model-written summary
Water stress substantially enhanced expression of CATB in rice leaves.
- Taxon
- riceOryza sativae0
- Treatment
- Water stresse2
- Gene
- CATBe2
- Outcome
- expression of CATBe2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e2“Water stress inhibited the expression of CATA and CATC but substantially enhanced the expression of CATB”
Claim · model-written summary
Exogenously applied ABA promoted CATB expression in rice leaves in a concentration-dependent manner.
- Taxon
- riceOryza sativae0
- Treatment
- Exogenously applied ABAe3
- Gene
- CATBe3
- Outcome
- expression of CATBe3
- Direction
- promotede3
- Qualifier
- in a concentration-dependent mannere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e3“Exogenously applied ABA promoted the expression of CATB also and inhibited the expression of CATC in a concentration-dependent manner”
Claim · model-written summary
Exogenously applied ABA inhibited CATC expression in rice leaves in a concentration-dependent manner.
- Taxon
- riceOryza sativae0
- Treatment
- Exogenously applied ABAe3
- Gene
- CATCe3
- Outcome
- expression of CATCe3
- Direction
- inhibitede3
- Qualifier
- in a concentration-dependent mannere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e3“Exogenously applied ABA promoted the expression of CATB also and inhibited the expression of CATC in a concentration-dependent manner”
Claim · model-written summary
Inhibiting ABA production with nordihydroguaiaretic acid and tungstate subdued CATB expression under water stress in rice.
- Taxon
- riceOryza sativae0
- Treatment
- ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstatee4
- Gene
- CATBe4
- Outcome
- expression of CATBe4
- Direction
- subduede4
- Qualifier
- under the water stresse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e4“When ABA production was inhibited by using ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstate, expression of CATB was also subdued while CATC was enhanced under the water stress”
Claim · model-written summary
Inhibiting ABA production with nordihydroguaiaretic acid and tungstate enhanced CATC expression under water stress in rice.
- Taxon
- riceOryza sativae0
- Treatment
- ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstatee4
- Gene
- CATCe4
- Outcome
- CATCe4
- Direction
- enhancede4
- Qualifier
- under the water stresse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e4“When ABA production was inhibited by using ABA biosynthesis inhibitors nordihydroguaiaretic acid and tungstate, expression of CATB was also subdued while CATC was enhanced under the water stress”
Claim · model-written summary
Inhibiting endogenous ABA production reduced H₂O₂ accumulation in rice leaves.
- Taxon
- riceOryza sativae0
- Treatment
- endogenous ABA production was inhibitede5
- Outcome
- Accumulation of H₂O₂e5
- Direction
- reducede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e5“Accumulation of H₂O₂ was also reduced when endogenous ABA production was inhibited and showed a correlation with the total activity of catalases”
Claim · model-written summary
H₂O₂ accumulation in rice leaves showed a correlation with total catalase activity.
- Taxon
- riceOryza sativae0
- Gene
- catalasese5
- Outcome
- Accumulation of H₂O₂e5
- Qualifier
- showed a correlation with the total activity of catalasese5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e5“Accumulation of H₂O₂ was also reduced when endogenous ABA production was inhibited and showed a correlation with the total activity of catalases”
Claim · model-written summary
Water stress-induced ABA appears to prevent excessive H₂O₂ accumulation in rice through induction of CATB expression.
- Taxon
- riceOryza sativae0
- Gene
- CATBe6
- Compound
- ABAe6
- Outcome
- excessive accumulation of H₂O₂e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice leaves when rice seedlings were treated with polyethylene glycol as water stress treatment”
e6“Our results suggest that water stress-induced ABA prevents the excessive accumulation of H₂O₂, through the induction of the expression of CATB gene during water stress”