1.

Differentiate Heliophytes & Sciophytes.

Answer»

The effect of daily light or day length on the flowering & fruiting of the plants is called as photoperiodism. The term photoperiodism was first used by Garner & Allard (1920). On the basis of daily light required for flowering, the plants are of three types-

  • Long day plants (LDP)
  • Short day plants (SDP)
  • Dav natural plants (DNP)

On the basis of requirement of light, the plants are of two types-

  1. Photophilous or Heliphelous or Heliophytes –
    The plants which need bright light to grow. Examples – Sun flower, Ameranthus, Populus etc.
  2. Sciophilous or Sciophytes –
    The plants which grow in less light or shadow. synthesis of anthocyanin pigment in plants. The purple sulphur bacteria use infra red & UV radiations for photosynthesis.


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