The abstract is read at the publisher; the summary is JClub's.
In mature maize pollen nuclei, accessory B chromosomes in Zea mays are linked to extensive chromatin accessibility and transcriptional activity at B-chromosome loci, with regulatory effects beyond them.
- Why it matters: Although B chromosomes’ chromosome drive is well described, how they reshape chromatin organization and transcription in gametophytic cells is unclear.
- What they did: Pollen nuclei from B73 plants carrying zero versus two B chromosomes were flow-sorted, then profiled with ATAC-seq and RNA-seq for integrated chromatin accessibility and gene expression analyses.
- The result: B-chromosome presence is associated with altered chromatin accessibility and gene expression on standard A chromosomes, implying regulatory impacts that extend beyond the B chromosome itself.
The findingWhy it mattersWhat they didThe result
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