Abstract
We analysed effects of abscisic acid (ABA, a negative regulatory hormone), alone and in combination with positive or neutral hormones, including salicylic acid (SA), on rice growth and expression of cell cycle-related genes. ABA significantly inhibited shoot growth and induced expression of OsKRP4, OsKRP5, and OsKRP6. A yeast two-hybrid assay showed that OsKRP4, OsKRP5, and OsKRP6 interacted with OsCDKA;1 and/or OsCDKA;2. When SA was simultaneously supplied with ABA, the antagonistic effect of SA completely blocked ABA inhibition. SA also blocked ABA inhibition of DNA replication and thymidine incorporation in the shoot apical meristem. These results suggest that ABA arrests cell cycle progression by inducing expression of OsKRP4, OsKRP5, and OsKRP6, which inhibit the G1/S transition, and that SA antagonizes ABA by blocking expression of OsKRP genes.
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Claims 10
Claim · model-written summary
ABA significantly inhibited rice shoot growth.
- Taxon
- rice
Oryza sativat0 - Treatment
- ABAe0
- Outcome
- shoot growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“ABA significantly inhibited shoot growth”
Claim · model-written summary
ABA induced expression of OsKRP4, OsKRP5, and OsKRP6.
- Taxon
- riceOryza sativat0
- Treatment
- ABAe0
- Gene
- OsKRP4, OsKRP5, and OsKRP6e0
- Outcome
- expression of OsKRP4, OsKRP5, and OsKRP6e0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“ABA significantly inhibited shoot growth and induced expression of OsKRP4, OsKRP5, and OsKRP6”
Claim · model-written summary
OsKRP4 interacted with OsCDKA;1 and/or OsCDKA;2 in a yeast two-hybrid assay.
- Taxon
- riceOryza sativat0
- Gene
- OsKRP4e0
- Outcome
- interacted with OsCDKA;1 and/or OsCDKA;2e0
- Qualifier
- OsCDKA;1 and/or OsCDKA;2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“OsKRP4, OsKRP5, and OsKRP6 interacted with OsCDKA;1 and/or OsCDKA;2”
Claim · model-written summary
OsKRP5 interacted with OsCDKA;1 and/or OsCDKA;2 in a yeast two-hybrid assay.
- Taxon
- riceOryza sativat0
- Gene
- OsKRP5e0
- Outcome
- interacted with OsCDKA;1 and/or OsCDKA;2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“OsKRP4, OsKRP5, and OsKRP6 interacted with OsCDKA;1 and/or OsCDKA;2”
Claim · model-written summary
OsKRP6 interacted with OsCDKA;1 and/or OsCDKA;2 in a yeast two-hybrid assay.
- Taxon
- riceOryza sativat0
- Gene
- OsKRP6e0
- Outcome
- interacted with OsCDKA;1 and/or OsCDKA;2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“OsKRP4, OsKRP5, and OsKRP6 interacted with OsCDKA;1 and/or OsCDKA;2”
Claim · model-written summary
Simultaneous SA completely blocked ABA inhibition of rice shoot growth.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“When SA was simultaneously supplied with ABA, the antagonistic effect of SA completely blocked ABA inhibition”
Claim · model-written summary
SA blocked ABA inhibition of DNA replication in the rice shoot apical meristem.
- Taxon
- riceOryza sativat0
- Organ / stage
- shoot apical meristeme0
- Treatment
- SAe0
- Outcome
- DNA replicatione0
- Direction
- blockede0
- Comparator
- ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SA also blocked ABA inhibition of DNA replication and thymidine incorporation in the shoot apical meristem”
Claim · model-written summary
SA blocked ABA inhibition of thymidine incorporation in the rice shoot apical meristem.
- Taxon
- riceOryza sativat0
- Organ / stage
- shoot apical meristeme0
- Treatment
- SAe0
- Outcome
- thymidine incorporatione0
- Direction
- blockede0
- Comparator
- ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SA also blocked ABA inhibition of DNA replication and thymidine incorporation in the shoot apical meristem”
Claim · model-written summary
The authors suggest that ABA arrests cell cycle progression by inducing OsKRP gene expression, inhibiting the G1/S transition.
- Taxon
- riceOryza sativat0
- Gene
- OsKRP4, OsKRP5, and OsKRP6e0
- Outcome
- cell cycle progressione0
- Qualifier
- G1/S transitione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“ABA arrests cell cycle progression by inducing expression of OsKRP4, OsKRP5, and OsKRP6, which inhibit the G1/S transition”
Claim · model-written summary
The authors suggest that SA antagonizes ABA by blocking OsKRP gene expression.
- Taxon
- riceOryza sativat0
- Treatment
- SAe0
- Gene
- OsKRP genese0
- Outcome
- ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“SA antagonizes ABA by blocking expression of OsKRP genes”
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