Plants which produce characteristic pneumatophores and show vivipary belong to :

(A)

Halophytes

(B)

Psammophytes

(C)

Hydrophytes

(D)

Mesophytes

NEET - Medical UG-2017 Hard

Answer & Solution:

The correct answer is Halophytes.

Halophytes are a group of plants that are naturally equipped with the mechanisms to survive under highly saline and arid conditions and produce high biomass. Halophytes show a diversity of growth responses to increasing salinity, ranging from inhibition up to dramatic stimulation. All halophytes display a common need to regulate cellular Na+, Cl− and K+concentrations as they adjust to the external water potential. The Na+ and Cl− is stored mainly in vacuoles, which forces the production of a range of compatible solutes in the cytoplasm. Respiratory or knee roots (pneumatophores) are characteristic of many species. They project above the mud and have small openings (lenticels) through which air enters, passing through the soft spongy tissue to the roots beneath the mud. Vivipary is the condition whereby the embryo (the young plant within the seed) grows first to break through the seed coat then out of the fruit wall while still attached to the parent plant. This condition is found in Bruguiera, Ceriops, Kandelia and Rhizophora species.

Plants which produce characteristic pneumatophores and show vivipary belong to :

Answer & Solution:

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