Regulation of Chloroplast Biogenesis and Differentiation Abstract. Chloroplasts are semi-autonomous organelles essential for photosynthetic organisms. They derived from ancestral cyanobacteria through an endosymb

Very happy this review is out 😊🌱
I've collected recent advances in transcriptional and epigenetic 🧬 Regulation of Chloroplast Biogenesis and Differentiation url: academic.oup.com/jxb/article/...

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🌱 The Center for Plant Biotechnology & Genomics (CBGP, UPM-INIA/CSIC) is #hiring!

We’re seeking a Head of the Translational Biology Unit/Knowledge Transfer Office to drive innovation, IP protection & industry partnerships.

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Single-nucleus transcriptomics revealed auxin-driven mechanisms of wood plasticity to enhance severe drought tolerance in poplar - Genome Biology Background Drought significantly affects forests and woody crops by limiting their growth, increasing their susceptibility to diseases, and reducing productivity. Wood anatomical plasticity is a crucial adaptive mechanism that enables trees to cope with fluctuations in water availability. During severe drought, trees develop more and narrower vessels, enhancing hydraulic safety and reducing the risk of embolism. However, the molecular regulation of vessel formation is still not well understood. Results Using single-nucleus transcriptomics, we have generated a cell type-specific gene expression map of the mature poplar stem under well-watered and drought conditions. Our findings reveal extensive gene expression reprogramming in xylem-forming cells, with changes in auxin homeostasis identified as a key mechanism for anatomical adaptation. Specifically, we show that poplar WAT1-like genes control vessel spatial patterning. Additionally, the downregulation of WAT1-like gene expression in the dividing cells of the vascular cambium and the upregulation of MP-like gene expression in cells undergoing early vessel differentiation facilitate the formation of secondary xylem with narrower and more numerous vessels under drought. Furthermore, the wat2 mutant exhibits greater drought tolerance than wild-type trees, underscoring its potential for developing drought-resilient tree varieties. Conclusions This study provides the first single-nucleus transcriptomic map of hybrid poplar stems under severe drought, uncovering auxin-driven hormonal networks that regulate xylem plasticity and enhance drought tolerance. These insights provide valuable targets for improving resilience in poplar and other woody species.

How do trees survive severe drought? 🌳 In this work performed at @cbgpmadrid.bsky.social , we used single-nucleus RNA-seq on mature Populus stems to reveal the genetic switches that reshape wood anatomy, helping trees stay resilient under severe drought stress.
doi.org/10.1186/s130...

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Deep tissue profiling of Populus stem at single nucleus level reveals uncharacterized cell types and cell-specific gene regulatory networks - Genome Biology Background Single-cell genomics is revolutionizing plant developmental biology, enabling the transcriptome profiling of individual cells and their lineage relationships. However, plant cell walls poly...

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🌱CBGP researcher Daniel Conde joined an international study published in Genome Biology revealing new regulators of xylem development and a novel mechanism shaping vessel formation and stress adaptation

📎Full article here: doi.org/10.1186/s130...