Question

Pneumatophores occur in……….
A. Carnivorous plants
B. Halophytes
C. Submerged hydrophytes
D. Free-floating hydrophytes

Answer 1

Hint: Pneumatophores are called the respiratory roots. They are short, vertical and negatively, geotropic roots that occur in mangrove plants.

Complete Answer:
- Pneumatophores occur in halophytes.
- The plants that grow completely in saline habitat are known as halophytes. These plants are found near sea-shores.
Examples of halophytes are phinophera, salva terra at vicinia etc.
- Although these plants grow in areas well saturated with water yet they do not avail because concentration of salts in water is high. Thus, the lateral roots grow upward into air from horizontally secondary roots. These are halophytes.
- These roots are called pneumatophores and they have potential for gaseous exchange. They are provided with the breathing pores for exchange of gases.
- These are found in specialized branches of roots that negatively geotropic and project above muddy soil surface to facilitate entry of atmosphere oxygen into the root system of plants.

Therefore, from the above explanation the correct option is (B) Halophytes.

Note: Halophytes are of four types depending upon nature of sub structure. They are lithophilous halophytes, salt swamp halophytes and mangrove vegetation. Salinity germination, growth and reproduction to specific seasons and by growing roots into non-saline layers and limiting salt uptake.