Question

Describe the 2 processes (Strategy I and stategy II) of iron uptake by plants.

Answer 1

Answer:- Two important strategies used by the plant to absorb the iron from soil.

1. Reduction based strategy- Proton ATPases 2 (AHA 2) extrudes protons in order to acidify the rhizosphere and increase Fe p3 solubility. Solubilized Fe p3 is reduced by membrane bound ferric reductase oxidase 2 (FRO2), and Fe p2 is absorbed by iron regulator transporter 1 (IRT1)

2. Chelation based strategy- Phytosiderosphores (PS) are synthesised and extruded into the rhizosphere by TOM1/OsZIFL4. Phytosiderophores chelates rhizospheric Fe p3 PS- complexes are taken into root cells by oligopeptide transporters 1 ( YS1).