Canola roots recruit phosphorus-scavenging bacteria by releasing chemical signals
Dong X, Luo Y, Chen Y, Yang B, Guo L
Soil Health
Farmers and gardeners growing canola or mustard greens in tired, phosphorus-depleted soil may one day swap synthetic fertilizer for a bacterial inoculant, the same way gardeners already use mycorrhizal powder on seedlings.
Rapeseed plants, which give us canola oil, send chemical signals through their roots that attract specific helpful bacteria when phosphorus is scarce. One bacterium in particular, Massilia, responds to these signals and helps the plant pull more phosphorus from the soil. In return, the plant feeds the bacterium with a small carbon-rich molecule, so both partners get something out of the deal.
Key Findings
Massilia bacteria abundance in the root zone is directly regulated by plant genes controlling phospholipid breakdown, linking host genetics to microbiome composition.
Inoculating plants with Massilia significantly promoted growth and increased membrane phospholipid levels under low-phosphorus conditions.
A metabolic exchange was confirmed: Massilia supplies bioavailable phosphorus to the plant from phospholipids, while the plant feeds Massilia glyceric acid as a carbon source.
chevron_right Technical Summary
Scientists discovered that rapeseed plants control which soil bacteria live around their roots by adjusting how they break down fats in their cell membranes. A bacterium called Massilia thrives under this system, boosts plant growth, and trades nutrients with the plant in a way that helps both survive phosphorus-poor soils.
Abstract Preview
Original paper
Rapeseed root phospholipid metabolism orchestrates low phosphorus-induced microbiome changes and the interaction with beneficial Massilia.
Phosphorus (P) is an essential macronutrient for plant development, and the role of microorganisms in enhancing plant P acquisition has attracted increasing attention. However, the genetic factors ...
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Rapeseed, also known as rape and oilseed rape and canola, is a yellow-flowered member of the Brassicaceae family.