Iron is an essential nutrient for plants, but it can be difficult for them to acquire in sufficient quantities from the soil. This is because iron is often bound to other elements in the soil, making it difficult for plants to absorb.
Some plants have evolved to form symbiotic relationships with fungi, which help them to acquire iron from the soil. These fungi, called mycorrhizal fungi, form a network of hyphae around the roots of the plant. The hyphae extend further into the soil than the plant roots, and they are able to access iron that would otherwise be unavailable to the plant.
In the new study, researchers at the University of Cambridge investigated the molecular mechanisms behind this symbiotic relationship. They focused on a specific type of mycorrhizal fungus, called Glomus intraradices, which is found in association with a wide variety of plants.
The researchers found that G. intraradices produces a protein called siderophore. Siderophores are small molecules that bind to iron and make it more soluble. This allows the fungus to access iron that would otherwise be unavailable to the plant.
The researchers also found that the plant produces a protein called SIT1, which is required for the uptake of iron from the fungus. SIT1 is expressed in the roots of the plant, and it helps to transport iron from the fungus into the plant cells.
The researchers believe that this study provides new insights into how plants and fungi work together to acquire iron. This knowledge could be used to develop new strategies for improving crop yields and reducing the environmental impact of agriculture.
For example, farmers could inoculate their crops with mycorrhizal fungi, which would help the plants to acquire more iron from the soil. This would reduce the need for iron fertilisers, which can be expensive and environmentally damaging.
The researchers are now planning to investigate how other mycorrhizal fungi interact with plants to acquire iron. They hope that this research will lead to the development of new sustainable农业技术.
