ZmbZIP39 coordinates source-flow-sink relations to boost grain filling in maize - PubMed
3 days ago
- #Transcription Factor
- #Maize
- #Grain Filling
- ZmbZIP39 is a key regulator coordinating source, flow, and sink processes in maize grain filling.
- It directly activates sucrose transporters ZmSUT1 and ZmSUT7, enhancing sucrose transport from leaves to kernels.
- ZmbZIP39 upregulates sucrose synthase genes, promoting sucrose cleavage and metabolism.
- It controls zein-encoding genes and Opaque2, driving nutrient storage and endosperm development.
- ZmbZIP39 forms a regulatory complex with factors like ZmABI19, ZmbZIP29, OHP1, OHP2, and ZmNAC130.
- Autoactivation of ZmbZIP39 creates a positive feedback loop, strengthening its regulatory network.