Question

Leguminous plants have their roots modified into
A. Fibrous roots
B. Stilt roots
C. Nodulated roots
D. Prop roots

Answer 1

Hint: Legumes is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of one of these plants. The seed is also called a pulse. Legumes are grown agriculturally, in general for human consumption, for livestock forage and silage, and as soil-improving green manure. For example, legumes include alfalfa, clover, beans, peas, chickpeas, lentils, lupins, mesquite, carob, soybeans, peanuts, and tamarind.

Complete answer:
Nodules increase in the roots of leguminous flowers like pulses and grams. These nodules have a completely specific function. They inhabit Rhizobium bacteria. It is a sort of nitrogen-fixing bacteria, It absorbs free nitrogen from the atmosphere and converts it into nitrites and nitrates, and fixes it inside the soil. From soil, flora takes in nitrogen fixed by using the bacteria. So, nitrogen requirements of leguminous plant life are fulfilled. Roots can be infected through the root hairs, broken epidermal tissues, or intact epidermis. During infection thru the root hairs, the plant and rhizobia should first recognize every difference for rhizobia colonization to arise. Colonization occurs on the basis floor and the rhizobia attach to the root hairs. The bacteria synthesize compounds called 'nod' elements that initiate the nodulation system in the plant upon the popularity of the proper rhizobia, the growing root hairs curl and form a pocket for the rhizobia. This lets in the bacteria to go into the plant through the foundation hair mobile wall. The plant builds pathways, called infection threads, across the rhizobia permitting them to flow among cells. With the production of the contamination threads, nodules start to form in the root hairs most usually because the plant’s roots are waterlogged; this shape of nodulation is regularly located in Neptunia and Sesbania.
The correct answer is option C, i.e., Nodulated roots.

Note: Legumes are fantastic in that most of them have symbiotic nitrogen-fixing bacteria in systems referred to as root nodules. For that cause, they play a key role in crop rotation. Most usually because the plant’s roots are waterlogged, this shape of nodulation is regularly located in Neptunia and Sesbania.