In plants, some cells serve as primary producers (source), whereas others depend on nutrient supply (sink). The source-to-sink translocation of photoassimilates, amino acids, and transport of hormones, RNAs, and proteins are mediated via the phloem. Therefore, the phloem is essential for distributing energy, nutrients, molecular building blocks, and signals in plants.
Our research topic is focused on identifying factors involved in the function of the phloem. We use a wide range of approaches including single-cell RNA sequencing, translational profiling, CRISPR/Cas9-based gene editing, and transport assays in heterologous expression systems to understand the transport processes and development of the phloem cells.
- Kim JY, Symeonidi E, Pang TY, Denyer T, Weidauer D, Bezrutczyk M, Miras M, Zöllner N, Hartwig T, Wudick MM, Lercher M, Chen L-Q, Timmermans MCP, Frommer WB (2021) Distinct identities of leaf phloem cells revealed by single cell transcriptomics. The Plant Cell. doi: 10.1093/plcell/koaa060
- Bezrutczyk M, Zöllner NR, Kruse CPS, Hartwig T, Lautwein T, Köhrer K, Frommer WB, Kim JY (2021). Evidence for phloem loading via abaxial bundle sheath cells of maize leaves. The Plant Cell, doi.org/10.1093/plcell/koaa055
- Kim JY, LooE, Frommer WB, Wudick MM(2021) Cellular export of sugars and amino acids: Role in feeding other cells and organisms. Plant Physiol, doi.org/10.1093/plphys/kiab228
- Kim JY, Yang W, Forner J, Lohmann, JU, Noh B, Noh YS (2018) Epigenetic reprogramming by histone acetyltransferase HAG1/AtGCN5 is required for pluripotency acquisition in Arabidopsis. EMBO Journal. 37: e98726. doi.org/10.15252/embj.201798726
- Kim JY, Oh JE, Noh YS, Noh B (2015) Epigenetic control of juvenile-to-adult phase transition by the Arabidopsis SAGA-like complex. Plant Journal. 83: 537-45, doi.org/10.1111/tpj.12908