Gibberellin repression of axillary bud formation inArabidopsisby modulation of DELLA‐SPL9 complex activity

We show that DELLA proteins regulate axillary bud formation by interacting and regulating the DNA-binding ability of SQUAMOSA-PROMOTER BINDING PROTEIN LIKE 9, a microRNA156-targeted squamosa promoter binding protein-like transcription factor

Qi‐Qi Zhang; Jia‐Gang Wang; Ling‐Yan Wang; Jun‐Fang Wang; Qun Wang; Ping Yu; Ming‐Yi Bai; Min Fan

2019

Key concepts

Scholarcy highlights

  • The formation of lateral branches has an important and fundamental contribution to the remarkable developmental plasticity of plants, which allows plants to alter their architecture to adapt to the challenging environment conditions
  • We show that DELLA proteins regulate axillary bud formation by interacting and regulating the DNA-binding ability of SQUAMOSA-PROMOTER BINDING PROTEIN LIKE 9, a microRNA156-targeted squamosa promoter binding protein-like transcription factor
  • SPL9 participates in the initial regulation of axillary buds by repressing the expression of LATERAL SUPPRESSOR, a key regulator in the initiation of axillary meristems, and LAS contributes to the specific expression pattern of the GA deactivation enzyme GA2ox4, which is expressed in the axils of leaves to form a low-GA cell niche in this anatomical region
  • Our study demonstrates that DELLA-SPL9-LAS-GA2ox4 defines a core feedback regulatory module that spatially pattern GA content in the leaf axil and precisely control the axillary bud formation in different spatial and temporal
  • Any queries should be directed to the corresponding author for the article

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