Osmoregulation in Plant

9/24/2015 CBSE


Osmoregulation in Plant



Due to the availability of water there are four groups of plant.


  • Hydrophyte

  • Halophyte

  • Xerophyte

  • Mesophyte



Hydrophyte

The group of plant which is grow in fresh water are called hydrophyte.

Characteristic of Hydrophyte


  • The plant do not have layer of cuticle.

  • The leave have stomata in the upper surface with take part in
    transpiration.

  • The root are either absent or poorly developed.

Example

Hydrilla, Lotus, Lily plant



Halophytes

The group of plant which is grow in marshy soil or salty soil are called
halophyte.

Characteristic of Halophyte


  • These plant absorb water from such a soil, which is higher salt
    concentration and low water potential.

  • Halophyte actively absorption salt into their roots.

  • In the leaves of plants salt glands are present which helps in the
    removal of salt and water from the body.

  • Some halophytes absorb humidity by leave.

Example

Glass wort, Cord grass



Mesophyte

The group of plant which is grow in well watered soil are called mesophyte.


Characteristics of Mesophyte


  • Their roots are well developed.

  • Their body is covered by a layer called cuticle.

  • They contain stomata for evaporation of extra water.

  • Some mesophyte excrete out water in the form of drop this process is
    called guttation.



Xerophyte

The group of plant which is grow in dry places such as desert are called
Xerophyte.

Characteristic of Xerophyte


  • Some plants do not face dry condition and produce seed are called
    ephemeral plant. During raining season seeds germinate.

  • Their root are well develop which go deep into the soil to absorb water.

  • Some plant have horizontal root on the surface to absorb rain water
    rapidly.

  • Some plant leaves are modified into spine to prevent transpiration.

  • Stem and leave covered by cuticle.

  • Some plant store water in cell (succulent)

Example

Cacuts, Euphorbia.




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