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Class 10 Class 12
What is the importance of boron in plant life ?

Importance of boron :

1. Boron is involved in pollen germination and cell elongation, cell differentiation.

2. It is required in the translocation of scarbohydrates.

3. It is required for the uptake of Calcium ions.

4. It helps in membrane functioning.

Name the best known symbiotic nitrogen fixing bacterium.

Rhizobium.

What type of condition is created by leghaemoglobin in the root modules of legumes ?

Anaerobic.

What is Hidden hunger in the case of plants?

Hidden hunger refers to a situation in which a crop needs more of a given nutrient yet has shown no deficiency symptoms. The nutrient content is above the deficiency symptom zone but still considerably needed for optimum crop production

How is nitrogenase enzyme protected ?

The nitrogenase enzyme is very sensitive to the molecular oxygen. It requires anaerobic conditions to work. The leg-haemoglobin in the nodule acts as an oxygen scavenger just meainting the anaerobic condition needed by the enzyme.

Which pigment is present in the root nodules of legumes ?

Leghaemoglobin.

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