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Tuber UPSC NOTE

 


  • Tubers are a type of enlarged structure used as storage organs for nutrients in some plants. 

  • They are used for the plant's perennation (survival of the winter or dry months), to provide energy and nutrients for regrowth during the next growing season, and as a means of asexual reproduction

  • Largely composed of starch-storing parenchyma tissue, they constitute the resting stage of various plants and enable overwintering in many species. 

Stem Tuber

  • A stem tuber forms from thickened rhizomes or stolons. 

  • The top sides of the tuber produce shoots that grow into typical stems and leaves and the undersides produce roots. 

  • They tend to form at the sides of the parent plant and are most often located near the soil surface.

  • Potatoes are stem tubers

Root Tuber

  • A tuberous root or storage root is a modified lateral root, enlarged to function as a storage organ. 

  • The enlarged area of the tuber can be produced at the end or middle of a root or involve the entire root. 

  • It is thus different in origin, but similar in function and appearance, to a stem tuber. 

  • Plants with tuberous roots include the sweet potato (Ipomoea batatas), cassava, and dahlia.

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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Tuber UPSC NOTE
Tuber UPSC NOTE
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