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High-resolution images and tomography show unprecedented 3D structures of plasmodesmata. In cells just post-cytokinesis, plasmodesmata do not have a visible cytoplasmic sleeve but still conduct cell-to-cell movement of micro- and macromolecules.
“Neither you nor I nor anyone know, how oats, peas, beans, and barley grow.” Like all fine nursery rhymes, this couplet rings true, but a new study brings us a step closer to being able to retort: “Do so!”
Cold stress activates Arabidopsis thaliana plasma membrane-localized CRPK1, which leads to 14-3-3 proteins entering the nucleus and promoting the degradation of CBF transcription factors, thus attenuating the cold-induced response.