CRISPR/Cas9-mediated knockout of PsLykX gene of pea (Pisum sativum L.) leads to loss of symbiotic nodules.
Zhuravlev IY, Lyakhovets AA, Matveenko AG, Lebedeva MA, Zhernakov AI
Summary
PubMedWhy it matters This matters because understanding exactly how pea plants partner with soil bacteria to 'fix' their own nitrogen could help scientists breed crops that need less synthetic fertilizer, lowering costs for farmers and reducing chemical runoff into waterways near your home.
Pea plants have a remarkable partnership with certain soil bacteria: the bacteria move into the plant's roots and form little lumps called nodules, where they pull nitrogen from the air and share it with the plant — essentially acting as a built-in fertilizer factory. Scientists suspected a particular gene controlled whether or not peas could recognize and invite these bacteria in, but they had no proof. By using CRISPR to 'switch off' that gene, they confirmed it: pea roots without the gene simply could not form nodules at all.
chevron_right Technical Details
Scientists used CRISPR gene editing to knock out a specific gene in pea plants and discovered it is essential for peas to form the root nodules that allow them to absorb nitrogen from soil bacteria — providing the first direct genetic proof of this gene's role in the symbiosis.
Key Findings
Knocking out the PsLykX gene in pea cultivar Caméor completely abolished the formation of nitrogen-fixing root nodules.
PsLykX is the first gene confirmed by direct genetic evidence to be essential for the symbiosis between European pea cultivars and Rhizobium ruizarguesonis RCAM1026.
The study used Agrobacterium-mediated hairy root transformation combined with CRISPR-Cas9 editing, with loss of nodulation confirmed by DNA sequencing of edited roots.
Abstract Preview
Pea (Pisum sativum L.) symbiosis with nodule bacteria supplying plants with additional nitrogen is a very specific plant-microbial interaction. Mutual recognition of the partners occurs through per...
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