Cell Wall Invertase 4 Governs Sucrose-Hexose Homeostasis in the Apoplast to Regulate Wood Development in Poplar
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View abstract on PubMed
Summary
This summary is machine-generated.The study identifies PtoCWIN4 as a key enzyme regulating sugar metabolism in poplar trees. Its absence impacts wood formation, affecting growth and cell wall composition.
Area Of Science
- Plant Biology
- Biochemistry
- Forestry
Background
- Wood development in trees is crucial for carbon sequestration and biomass production.
- Sugars act as both energy sources and signaling molecules in regulating tree growth.
- The molecular mechanisms linking sugar metabolism to wood formation are not fully understood.
Purpose Of The Study
- To investigate the role of Cell Wall Invertase 4 (CWIN4) in regulating wood development in Populus tomentosa.
- To elucidate the function of PtoCWIN4 in sugar metabolism and its impact on secondary cell wall formation.
Main Methods
- Gene expression analysis of PtoCWIN4 in Populus tomentosa stems.
- Generation and phenotypic analysis of PtoCWIN4 knockout mutants.
- Biochemical assays to assess sucrose cleavage activity.
- Analysis of carbon partitioning and cell wall composition in mutant lines.
Main Results
- PtoCWIN4 is highly expressed in poplar stems and exhibits efficient sucrose hydrolysis.
- PtoCWIN4 knockout mutants show stunted growth, altered branching, and reduced secondary xylem.
- Mutants exhibit increased secondary cell wall thickness with higher cellulose and hemicellulose content.
- Impaired carbon flow from sucrose to hexoses was observed in knockout lines.
Conclusions
- PtoCWIN4 is a critical regulator of sucrose-to-hexose conversion in wood formation.
- This enzyme plays a vital role in balancing tree growth and structural biomass production.
- PtoCWIN4 acts as a metabolic gateway essential for efficient wood development.
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