Plant growth-promoting rhizobacteria, Pseudomonas produce ......... which chelate iron and make it unavailable to harmful fungi for potato, sugarbeet and radish.

Nutrilite

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NPK with Anabaena

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Biopoesticide rich in Nostoc

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Siderophore

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Solution

The correct option is D Siderophore
One of the important elements for growth of living things is iron. It is present in an abundant amount on the earth crust. However, it is not readily available for organisms due to difficulty in solubility. Ferric ion is an available form of iron accessible to organisms.Siderophores are small iron-chelating compounds produced by plant growth promoting rhizobacteria, Pseudomonas. These organisms colonize around the root surface of potato, sugarbeet and radish. Siderophores binds to ferric ion and makes it unavailable to the harmful fungi for potato, sugarbeet and radish.
Thus, the correct answer is option D.

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