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The NAC Transcription Factor PtARN Governs Age-Related Wood Formation via a PtDAL1-PtARN Regulatory Cascade in Chinese Pine.
Plant, Cell & Environment · · Journal Article
Zuo, Sun + more
Abstract ↗AI summary
The abstract is read at the publisher; the summary is JClub's.
PtARN is an age-correlated master regulator of secondary xylem lignification in Chinese pine (Pinus tabuliformis), directly activated by PtDAL1 and binding 189 secondary cell wall gene promoters.
- Why it matters: Conifers show age-dependent shifts in wood development, but the transcriptional network linking developmental timing to secondary cell wall remodeling is poorly defined.
- What they did: The study combined multi-omics, cross-sectional and Raman microspectroscopy, temporal transcriptomics, promoter binding, genome-wide secondary cell wall gene identification, and genome-wide DNA affinity purification.
- The result: PtARN directly activates secondary cell wall biosynthesis genes and represses PtMYB162, forming a PtDAL1–PtARN regulatory cascade that fine-tunes lignification in secondary xylem.
The findingWhy it mattersWhat they didThe result
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