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Recently, the Crop Genome and Genetic Improvement Laboratory of the Institute of Biotechnology, Chinese Academy of Agricultural Sciences has made new progress in the study of the regulation mechanism of auxin transport in plant cells
.
The research results were published online in the International Botany Journal "New Phytologist" on June 6
.
? Auxin is an important type of hormone in plants, and it plays an extremely important role in many aspects of plant growth and development
.
The process of auxin transport regulation has an important impact on maintaining the normal growth and development of plants
.
In recent years, great progress has been made in the research on the regulation mechanism of auxin transport between plant cells, but the process and regulation mechanism of auxin transport in plant cells are still poorly understood
.
? Through the screening of the constructed rice RNAi mutant library, the researchers isolated a mutant that affects the length of rice culm during the filling stage
.
Further studies on the mutants found that the down-regulated expression in the mutants is a new gene OsCOLE1 (OsCOV-LIKE 1) with unknown function, which can affect the content of auxin in the internodes of rice
.
The homologous genes of this gene are highly conserved in many types of plants
.
The analysis of subcellular localization and tissue expression level showed that OsCOLE1 was localized on the cell tonoplast and expressed in all stages of rice growth and development
.
By combining yeast two-hybrid library screening, split ubiquitin yeast two-hybrid experiment and fluorescence two-molecular complementation experiment, the intracellular interaction protein OsCOLE1 (OsCOLE1-INTERACTING PROTEIN) was discovered
.
Through the analysis of the protein structure, subcellular location and auxin transport capacity of OsCLIP, it is determined that OsCLIP is a new auxin transporter located in the vacuole membrane in rice
.
OsCOLE1 interacts with OsCLIP to directly regulate OsCLIP’s ability to transport auxin
.
This study has discovered a new tonoplast auxin transporter and its regulatory protein, and for the first time at the molecular level revealed a new auxin transport regulation mode that exists in plant cell vacuoles, which further expands people’s understanding of auxin transport.
The existing knowledge of the process
.
.
The research results were published online in the International Botany Journal "New Phytologist" on June 6
.
? Auxin is an important type of hormone in plants, and it plays an extremely important role in many aspects of plant growth and development
.
The process of auxin transport regulation has an important impact on maintaining the normal growth and development of plants
.
In recent years, great progress has been made in the research on the regulation mechanism of auxin transport between plant cells, but the process and regulation mechanism of auxin transport in plant cells are still poorly understood
.
? Through the screening of the constructed rice RNAi mutant library, the researchers isolated a mutant that affects the length of rice culm during the filling stage
.
Further studies on the mutants found that the down-regulated expression in the mutants is a new gene OsCOLE1 (OsCOV-LIKE 1) with unknown function, which can affect the content of auxin in the internodes of rice
.
The homologous genes of this gene are highly conserved in many types of plants
.
The analysis of subcellular localization and tissue expression level showed that OsCOLE1 was localized on the cell tonoplast and expressed in all stages of rice growth and development
.
By combining yeast two-hybrid library screening, split ubiquitin yeast two-hybrid experiment and fluorescence two-molecular complementation experiment, the intracellular interaction protein OsCOLE1 (OsCOLE1-INTERACTING PROTEIN) was discovered
.
Through the analysis of the protein structure, subcellular location and auxin transport capacity of OsCLIP, it is determined that OsCLIP is a new auxin transporter located in the vacuole membrane in rice
.
OsCOLE1 interacts with OsCLIP to directly regulate OsCLIP’s ability to transport auxin
.
This study has discovered a new tonoplast auxin transporter and its regulatory protein, and for the first time at the molecular level revealed a new auxin transport regulation mode that exists in plant cell vacuoles, which further expands people’s understanding of auxin transport.
The existing knowledge of the process
.
