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Description de l'item "Terre"

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Root nodules of Discaria (Order: Rosales), a non-legume species capable of nitrogen-fixing symbiosis.

Nitrogen-fixing symbioses reveal themselves

Recent research has revealed the origin and evolution of symbiotic relationships between certain plants and soil bacteria in order to use atmospheric nitrogen. This knowledge could ultimately contribute to the development of sustainable agriculture minimising the use of chemical fertilisers.
Cowpea roots bear nodules which contain nitrogen-fixing bacteria.

Lipids that boost symbiosis

Certain legumes form a symbiotic relationship with bacteria! Tucked into their roots, these bacteria increase the crop yield of these plants. These bacteria, capable of producing lipid molecules known as hopanoids, therefore seem to provide a distinct advantage.