Abstract
Cytokinins play important roles in regulating plant development, including shoot and root meristems, leaf longevity and grain yield. However, the in planta functions of rice cytokinin receptors have not been genetically characterized yet. Here we isolated a rice mutant, Osckt1, with enhanced tolerance to cytokinin treatment. Further analysis showed that Osckt1 was insensitive to aromatic cytokinins but responded normally to isoprenoid and phenylurea-type cytokinins. Map-based cloning revealed that a point mutation occurred in a putative cytokinin receptor gene, histidine kinase 6 (OsHK6). OsCKT1 was found to be expressed in various tissues throughout the plant and the protein was located in the endoplasmic reticulum (ER). In addition, whole-genome gene expression profiling analysis showed that OsCKT1 was involved in cytokinin regulation of a number of biological processes, including secondary metabolism, sucrose and starch metabolism, chlorophyll synthesis and photosynthesis. Our results demonstrate that OsCKT1 plays important roles in cytokinin perception and control of root development in rice.
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Claims 9
Claim · model-written summary
Osckt1 showed enhanced tolerance to cytokinin treatment.
- Taxon
- rice
Oryza sativae0 - Material
- Osckt1e0
- Treatment
- cytokinin treatmente0
- Outcome
- tolerancee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a rice mutant, Osckt1, with enhanced tolerance to cytokinin treatment”
Claim · model-written summary
Osckt1 was insensitive to aromatic cytokinins.
Not reportedTaxon
Verbatim
e0“Osckt1 was insensitive to aromatic cytokinins but responded normally to isoprenoid and phenylurea-type cytokinins”
Claim · model-written summary
Osckt1 responded normally to isoprenoid cytokinins.
Not reportedTaxon
Verbatim
e0“Osckt1 was insensitive to aromatic cytokinins but responded normally to isoprenoid and phenylurea-type cytokinins”
Claim · model-written summary
Osckt1 responded normally to phenylurea-type cytokinins.
Not reportedTaxon
Verbatim
e0“Osckt1 was insensitive to aromatic cytokinins but responded normally to isoprenoid and phenylurea-type cytokinins”
Claim · model-written summary
A point mutation was found in histidine kinase 6 (OsHK6).
Not reportedTaxon
Verbatim
e0“a point mutation occurred in a putative cytokinin receptor gene, histidine kinase 6 (OsHK6)”
Claim · model-written summary
OsCKT1 was expressed in various tissues throughout the plant.
Not reportedTaxon
Verbatim
e0“OsCKT1 was found to be expressed in various tissues throughout the plant”
Claim · model-written summary
OsCKT1 protein was located in the endoplasmic reticulum.
- Outcome
- located in the endoplasmic reticulume0
Not reportedTaxon
Verbatim
e0“the protein was located in the endoplasmic reticulum (ER)”
Claim · model-written summary
Expression profiling implicated OsCKT1 in cytokinin regulation of secondary metabolism, sucrose and starch metabolism, chlorophyll synthesis and photosynthesis.
Not reportedTaxon
Verbatim
e0“OsCKT1 was involved in cytokinin regulation of a number of biological processes, including secondary metabolism, sucrose and starch metabolism, chlorophyll synthesis and photosynthesis”
Claim · model-written summary
The authors conclude OsCKT1 contributes to cytokinin perception and root development.
- Taxon
- riceOryza sativae0
- Gene
- OsCKT1e0
- Outcome
- cytokinin perception and control of root developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“OsCKT1 plays important roles in cytokinin perception and control of root development in rice”
The same questions in other papers
class · disease · Oryza sativa (rice)Results agree
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