Abstract
Both strigolactones (SLs) and abscisic acid (ABA) biosynthetically originate from carotenoids. Considering their common origin, the interaction of these two hormones at the biosynthetic and/or regulatory level may be anticipated. Here we show that, in rice, drought simultaneously induces SL production in the root, and ABA production and the expression of SL biosynthetic genes in the shoot. Under control conditions, the ABA concentration was higher in shoots of the SL biosynthetic rice mutants dwarf10 (d10) and d17 than in wild-type plants, while a similar trend was observed for the SL perception mutant d3. These differences were enhanced under drought. However, drought did not result in an increase in leaf ABA content in the rice mutant line d27, carrying a mutation in the gene encoding the first committed enzyme in SL biosynthesis, to the same extent as in the other SL mutants and the wild type. Accordingly, d10, d17, and d3 lines were more drought tolerant than wild-type plants, whereas d27 displayed decreased tolerance. Finally, overexpression of OsD27 in rice resulted in increased levels of ABA when compared with wild-type plants. We conclude that the SL and ABA pathways are connected with each other through D27, which plays a crucial role in determining ABA and SL content in rice.
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Claims 11
Claim · model-written summary
Drought induces strigolactone production in the rice root.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- roote0
- Treatment
- droughte0
- Outcome
- SL productione0
- Direction
- inducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice, drought simultaneously induces SL production in the root, and ABA production and the expression of SL biosynthetic genes in the shoot”
Claim · model-written summary
Drought induces ABA production in the rice shoot.
- Taxon
- riceOryza sativae0
- Organ / stage
- shoote0
- Treatment
- droughte0
- Outcome
- ABA productione0
- Direction
- inducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice, drought simultaneously induces SL production in the root, and ABA production and the expression of SL biosynthetic genes in the shoot”
Claim · model-written summary
Drought induces expression of SL biosynthetic genes in the rice shoot.
- Taxon
- riceOryza sativae0
- Organ / stage
- shoote0
- Treatment
- droughte0
- Outcome
- expression of SL biosynthetic genese0
- Direction
- inducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in rice, drought simultaneously induces SL production in the root, and ABA production and the expression of SL biosynthetic genes in the shoot”
Claim · model-written summary
Under control conditions, shoot ABA concentration was higher in the SL biosynthetic mutants d10 and d17 than in wild-type plants.
- Taxon
- riceOryza sativae1
- Material
- dwarf10 (d10) and d17e1
- Organ / stage
- shootse1
- Outcome
- ABA concentratione1
- Direction
- highere1
- Qualifier
- Under control conditionse1
- Comparator
- wild-type plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under control conditions, the ABA concentration was higher in shoots of the SL biosynthetic rice mutants dwarf10 (d10) and d17 than in wild-type plants, while a similar trend was observed for the SL perception mutant d3”
Claim · model-written summary
Under control conditions, shoot ABA concentration of the SL perception mutant d3 showed a similar trend, higher than wild-type plants.
- Taxon
- riceOryza sativae1
- Material
- d3e1
- Organ / stage
- shootse1
- Outcome
- ABA concentratione1
- Direction
- higherinferrede1
- Comparator
- wild-type plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under control conditions, the ABA concentration was higher in shoots of the SL biosynthetic rice mutants dwarf10 (d10) and d17 than in wild-type plants, while a similar trend was observed for the SL perception mutant d3”
Claim · model-written summary
The ABA concentration differences between SL mutants and wild-type plants were enhanced under drought.
- Taxon
- riceOryza sativae1
- Treatment
- droughte2
- Outcome
- ABA concentratione1
- Direction
- enhancede2
- Comparator
- wild-type plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under control conditions, the ABA concentration was higher in shoots of the SL biosynthetic rice mutants dwarf10 (d10) and d17 than in wild-type plants, while a similar trend was observed for the SL perception mutant d3”
e2“These differences were enhanced under drought”
Claim · model-written summary
Drought did not increase leaf ABA content in the rice mutant d27 to the same extent as in the other SL mutants and wild type.
- Taxon
- riceOryza sativae3
- Material
- d27e3
- Treatment
- droughte3
- Outcome
- leaf ABA contente3
- Direction
- did not result in an increasee3
- Comparator
- the other SL mutants and the wild typee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“drought did not result in an increase in leaf ABA content in the rice mutant line d27, carrying a mutation in the gene encoding the first committed enzyme in SL biosynthesis, to the same extent as in the other SL mutants and the wild type”
Claim · model-written summary
The rice mutants d10, d17 and d3 were more drought tolerant than wild-type plants.
- Taxon
- riceOryza sativae3
- Material
- d10, d17, and d3 linese4
- Outcome
- drought tolerante4
- Direction
- moree4
- Comparator
- wild-type plantse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“drought did not result in an increase in leaf ABA content in the rice mutant line d27”
e4“d10, d17, and d3 lines were more drought tolerant than wild-type plants, whereas d27 displayed decreased tolerance”
Claim · model-written summary
The rice mutant d27 displayed decreased drought tolerance.
- Taxon
- riceOryza sativae3
- Material
- d27e4
- Outcome
- tolerancee4
- Direction
- decreasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“drought did not result in an increase in leaf ABA content in the rice mutant line d27”
e4“d10, d17, and d3 lines were more drought tolerant than wild-type plants, whereas d27 displayed decreased tolerance”
Claim · model-written summary
Overexpression of OsD27 in rice increased ABA levels relative to wild-type plants.
- Taxon
- riceOryza sativae5
- Treatment
- overexpression of OsD27e5
- Gene
- OsD27e5
- Outcome
- levels of ABAe5
- Direction
- increasede5
- Comparator
- wild-type plantse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“overexpression of OsD27 in rice resulted in increased levels of ABA when compared with wild-type plants”
Claim · model-written summary
D27 links the SL and ABA pathways and plays a crucial role in determining ABA and SL content in rice.
- Taxon
- riceOryza sativae6
- Gene
- D27e6
- Outcome
- ABA and SL contente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“We conclude that the SL and ABA pathways are connected with each other through D27, which plays a crucial role in determining ABA and SL content in rice”