IN BRIEF by Jennifer Mach jmach@aspb.org Movement of macromolecules through the plant phloem provides a mechanism for long-distance signaling that plants use in development, disease resistance, and other adaptive responses (reviewed in Spiegelman et al., 2013). For example, full-length RNAs, such as the Arabidopsis thaliana GIBBERELLIC ACID INSENSITIVE and potato (Solanum tuberosum) BEL5 mRNAs, and […]
IN BRIEF by Jennifer Lockhart jlockhart@aspb.org Investigating how plants grow and develop often requires a bit of creativity. For example, deep within the plant, the vascular cambium, a layer of embryonic, highly cytoplasmic cells, gives rise to xylem and phloem tissue, which must expand throughout the plant’s lifetime. Water and nutrients primarily flow through the […]
Last month I spent a few days at the Max Planck Institute of Molecular Plant Physiology in Potsdam, where I gave a talk about career building for early career researchers. I’ve shared the slides and here I summarize the take-home messages and links. Chance favors the prepared mind By now you’ve heard that there are […]
Nemhauser and Torii define synthetic biology as “an engineering approach to design, build and analyize dynamic molecular devices and/or pathways from biological components to produce cells and organisms with customized functionality.” In their review, they describe several plant synthetic biology approaches and outcomes, including efforts to identify and remediate toxins, engineer receptors, modify signals and […]
Many plant traits are multigenic, so engineering them requires modulating the expression of several genes simultaneously. Synthetic promoters and transcription factors offer such a possibility. For example, a cis-element can be introduced into the promoter of each gene of interest, and a synthetic transcription factor that activates gene expression via this cis-element and is itself […]
Raitskin and Patron review efforts to express multiple single guide RNA (sgRNAs) and Cas9 in plants for the coordinated expression of many genes. They argue for the need to create single plasmids carrying the sgRNAs and Cas9, using a Type IIS restriction endonuclease-mediated assembly method. Curr. Opin. Biotech. 10.1016/j.copbio.2015.11.008
Puchta reviews the different ways that CRISPR/Cas9 can be used in synthetic biolgy, beyond the common gene-editing function. For example, the Cas9 protein can be fused to other proteins that activate or repress transcription, and targeted to different promoters using guide RNAs. He further explores the possibility of one day producing synthetic plant genomes. Plant […]
Control of gene expression involves both activation and repression of transcription. Schaumberg et al. used transient expression in Arabidopsis and sorghum protoplasts and dual-luciferase outputs to rapidly quantitate synthetic repressors and repressible promoters, and verified their results in transgenic Arabidopsis plants. Nature Methods 10.1038/nmeth.3659
Patron et al. describe the need to standardize DNA parts and terminology, so that researchers and inventors can use off-the-shelf parts (they draw an analogy to the standardization of components in mechanical and electronic engineering). New Phytol. 10.1111/nph.13532