Mode of nutrition

Mode of nutrition:

Autotrophic nutrition:

Several green plants are self- dependent, since they synthesize their own food materials through photosynthesis. Such type of a mode of nutrition is explained as autotrophic.  Autotrophic plants are of dissimilar types as per to their ecological environments. Dissimilar environments cause variations in their morphology. So, we come across special adaptations in aquatic plants, xerophytes, terrestrial plants, mangrove plants etc. Between the autotrophic plants, epiphytes are peculiar. These plants generally grow up on the branches of the trees. On these types of trees epiphytic plants are not parasitic, but they just use the place to grow. They have two sorts of roots. That is:

1. Clinging roots and
2. Aerial roots.

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                                                             Diagram: Epiphyte example: Vanda

Clinging roots set the epiphytes to the bark of the tree and as well absorb the little nutrients that found in the debris accumulating on the bark. The aerial roots hang about in the air. These roots are generally green and covered through a spongy tissue termed as velamen that absorbs the moisture in the air also rain water. Example- Vanda.

 

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