Gene Details:

• Gene ID: Zm00001eb347600
• Gene Symbol: ZmDREB2A DBP1b DREB2 ZmDREB2.1 ZmERF134 ZmERF135 ZmERF136
• Gene Name: AP2-EREBP-transcription factor 22
• Genome: Zm-B73-REFERENCE-NAM-5.0
• Species: Zea mays

Functional Descriptions:

• The unaged seeds of two independent maize DEHYDRATION-RESPONSIVE ELEMENT-BINDING2A mutant (zmdreb2a) lines, with decreased expression of GRETCHEN HAGEN3.2 (ZmGH3.2, encoding indole-3-acetic acid [IAA] deactivating enzyme), and increased IAA in their embryo, produced longer seedling shoots and roots, than the null segregant (NS) controls.
• Overexpression of ZmDREB2A in maize protoplasts increased the expression of ZmGH3.2, ZmRAFS genes and that of a Rennila LUCIFERASE reporter (Rluc) gene, which was controlled by either the ZmGH3.2- or ZmRAFS-promoter.
• These findings provide evidence that ZmDREB2A regulates the longevity of maize seed by stimulating the production of raffinose while simultaneously acting to limit auxin-mediated cell expansion.
• ZmDREB2A regulates ZmGH3.2 and ZmRAFS, shifting metabolism towards seed aging tolerance over seedling growth.
• ZmDREB2A is a drought response gene.
• ZmbHLH124T-ORG could directly bind the cis-acting elements in ZmDREB2A promoter to enhance its expression.

Function-related keywords:

• drought ,  drought-response ,  seed ,  iaa

Literature:

• Tasselseed5 encodes a cytochrome C oxidase that functions in sex determination by affecting jasmonate catabolism in maize.   DOI:  10.1111/jipb.12826 ;  PMID:  31087765
• Maize and heat stress: Physiological, genetic, and molecular insights.   DOI:  10.1002/tpg2.20378 ;  PMID:  37587553
• ZmDREB2A regulates ZmGH3.2 and ZmRAFS, shifting metabolism towards seed aging tolerance over seedling growth.   DOI:  10.1111/tpj.14922 ;  PMID:  32662115

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Gene Resources:

• NCBI ID: LOC732788
• UniProt accessions: C3UZ65

Sequences: