Question

Which of the following is an example of modified adventitious root?
(a) Carrot
(b) Radish
(c) Asparagus
(d) Rhizophora

Answer 1

Hint:
It is the type of root that is not developed from the radicle but the other parts of the plants.
Asparagus is the example of a modified adventitious root in which roots are modified for the storage of food. The adventitious roots are generally developed from the stem nodes, intermodal, leaves, etc. These roots are modified for various purposes such as food storage, respiration, and support of plants. However, in some plants, the roots get modified by changing their shape to absorb and transport water and minerals from the soil to various parts of the plants.

Complete answer:
Modifications of adventitious roots:
For storage of food: Adventitious roots are modified for the storage of food that includes different types of roots such as fasciculated roots, nodulose roots, simple tuberous roots, moniliform, and annulated roots.
For mechanical support: These roots are modified to provide mechanical support to the plants. It includes different types of roots such as prop roots, stilt roots, buttress roots, and climbing roots.
Other essential functions: Some roots are modified to perform the various important functions. They involve absorbing roots, assimilatory roots, sucking roots, reproductive roots, mycorrhizal roots, etc. Assimilatory roots are capable of photosynthesis and they are developed from the stem nodes. They are modified to a highly branched structure to increase the photosynthetic area.

So, the correct answer is ‘Asparagus’.

Note:
Epiphytic orchids develop a special type of spongy tissue called velamen which helps in the absorption of moisture from the surrounding air.
Nodulated roots provide shelter to nitrogen-fixing bacteria Rhizobium Leguminosarum.