Phytosiderophores

Phytosiderophores are a group of naturally occurring chelating agents produced by grasses to increase the bioavailability of essential micronutrients, particularly iron, in the soil. They are a subset of the larger class of compounds known as siderophores, which are produced by a variety of organisms to scavenge iron from their environments.

Production and Function

Phytosiderophores are produced by grasses under conditions of iron deficiency. They are released into the soil where they form soluble complexes with iron, making it available for uptake by the plant. This process is known as Strategy II iron uptake, and is distinct from the Strategy I iron uptake used by non-grass plants.

Phytosiderophores are also capable of chelating other micronutrients, such as zinc, copper, and manganese, thereby increasing their bioavailability in the soil. However, their primary function is to facilitate iron uptake.

Types of Phytosiderophores

The most common type of phytosiderophore is mugineic acid, which is produced by a variety of grass species. Other types include avenic acid, distichonic acid, and epi-hydroxymugineic acid, each of which is produced by specific grass species.

Role in Agriculture

Phytosiderophores have potential applications in agriculture, particularly in areas with iron-deficient soils. By enhancing the bioavailability of iron and other micronutrients, they can improve plant health and yield. However, further research is needed to fully understand their role in plant nutrition and to develop practical applications.

See Also

• Iron chelation therapy
• Micronutrient
• Soil fertility

References

Phytosiderophores Resources
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