Which one of the following helps in absorption of phosphorus from soil by plants? A) Rhizobium B) Anabaena C) Frankia D) Glomus Option (D) is correct answer. Can you explain?

Question

Answer

Glomus helps in absorption of phosphorus from the soil by plants. It is an arbuscular mycorrhiza wheras the others i.e. Rhizobium, Anabaena and frankia are nitrogen fixers. thus,op D.

Answer

Glomus helps in absorption of phosphorus from the soil by plants. It is an arbuscular mycorrhiza and the other are nitrogen fixer

So the correct answer is option (D)

Answer

Phosphorus Absorption in Plants
Phosphorus is an essential nutrient for plant growth and development. It plays a vital role in energy transfer, photosynthesis, and the formation of DNA and RNA. However, phosphorus is often present in the soil in an insoluble form, making it difficult for plants to absorb. To overcome this challenge, plants have developed various strategies, including the involvement of specific microorganisms.

Symbiotic Relationships
Plants form symbiotic relationships with certain microorganisms that help enhance nutrient availability in the soil. These microorganisms colonize the root systems of plants and provide them with various benefits, including the facilitation of phosphorus absorption.

Role of Mycorrhizal Fungi
One such group of microorganisms that aid in phosphorus absorption is mycorrhizal fungi, particularly those belonging to the Glomus genus. These fungi form mutualistic associations with plant roots, forming structures called mycorrhizae. The mycorrhizal fungi extend their hyphae (thread-like structures) into the soil, significantly increasing the surface area available for nutrient absorption.

Specific Mechanisms
The mycorrhizal fungi employ several mechanisms to enhance phosphorus uptake by plants:

1. Increased Phosphorus Solubilization: Mycorrhizal fungi produce enzymes, such as acid phosphatases, that help solubilize insoluble forms of phosphorus in the soil, making it more accessible to plants.

2. Enhanced Phosphorus Transport: The fungal hyphae extend beyond the depletion zone around the plant roots, exploring a larger soil volume. This allows the fungi to access phosphorus in areas where plant roots cannot reach.

3. Nutrient Exchange: The mycorrhizal fungi receive carbohydrates from the plant in exchange for nutrients, including phosphorus. This mutual exchange benefits both the fungi and the plant.

Conclusion
In conclusion, the microorganism that helps in the absorption of phosphorus from the soil by plants is Glomus, a genus of mycorrhizal fungi. These fungi form symbiotic relationships with plant roots, increasing their surface area for nutrient absorption and aiding in the solubilization and transport of phosphorus. This interaction between plants and mycorrhizal fungi is a crucial adaptation that allows plants to access the essential nutrient phosphorus for their growth and development.

Similar Class 12 Doubts

Which phenomenon is represented by the following diagram ?

Nitrogen fixation by Rhizobium is increased in the presence of

Which of the following is the cyanobacterial group acting as biofertiliser ?

What is the process called when the molecules of a substance are retained at the surface of a solid or a liquid?

The phenomenon in which adsorption and absorption takes place simultaneously is called?

Top Courses for Class 12

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams