Targeting redundant gene families: A multiplexed, tissue-specific CRISPR toolbox for Arabidopsis genetic screens.
Anfang M, Yahya RH, Caldararu O, Ben Yaakov S, Landau U
Crispr
Understanding how plants take up nutrients from soil could lead to crops that need less fertilizer, reducing the chemical runoff that pollutes the rivers and streams near your home.
Plants often have multiple copies of the same gene working as backups for each other, which makes it hard for scientists to figure out what any single gene actually does — knocking one out just lets the others cover for it. This new toolkit lets researchers switch off several backup genes at once, in specific tissues, to finally expose the hidden jobs those genes are doing. Using this approach on thale cress — a small weed scientists love because it's easy to study — the team mapped over 700 genes involved in how plants pull nutrients out of soil.
Key Findings
The toolkit uses pairs of gene-editing guides per construct to simultaneously target multiple members of the same gene family, overcoming the redundancy problem that has long hidden gene functions.
Over 1,000 plant lines were generated targeting 707 transporter genes across 114 gene families involved in nutrient uptake.
A double-barcoding strategy allows efficient tracking of gene-edit combinations across thousands of plants without needing to sequence each one individually.
chevron_right Technical Summary
Scientists created a powerful new genetic toolkit that can simultaneously disable multiple related genes in Arabidopsis plants, giving researchers much finer control over where and when gene edits occur. This accelerates discovery of how plants absorb nutrients from soil.
Abstract Preview
Genome-scale targeted CRISPR libraries for forward genetic screens in plants are powerful tools for functional analysis, but they suffer from limited spatial control, single sgRNA design, and poor ...
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