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PLANTLETS

PLANTLETS. Intermediate 1 Biology. INTRODUCTION. A plantlet is a tiny version of a plant still attached somewhere to its parent plant The plantlets obtain food from the parent plant until they are established. OBTAINING PLANTLETS. Plantlets can be obtained by different methods:

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PLANTLETS

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  1. PLANTLETS Intermediate 1 Biology

  2. INTRODUCTION • A plantlet is a tiny version of a plant still attached somewhere to its parent plant • The plantlets obtain food from the parent plant until they are established

  3. OBTAINING PLANTLETS • Plantlets can be obtained by different methods: 1. production of plantlets from runners 2. production of leaf plantlets 3. production of plantlets from offsets

  4. 1. PRODUCTION OF PLANTLETS FROM RUNNERS • Some types of plants produce plantlets at the end of ‘horizontal’ stems called runners.

  5. Spider plant

  6. METHOD OF OBTANING PLANTLETS FROM RUNNERS • The plantlet can be ‘pegged down’ into a small pot of compost using wire • When the roots are established, the runner is cut close to the new plant and the wire removed

  7. PRODUCTION OF PLANTLETS FROM RUNNERS

  8. 2. PRODUCTION OF LEAF PLANTLETS • Some types of plant develop plantlets on the edges of mature leaves • These can be detached from the leaf and grown in small pots of compost • An example of this is the Mexican Hat plant

  9. Mexican Hat Plant

  10. In other plants, a plantlet develops at the base of each mature leaf where it meets the leaf stalk. • An example of this is the Piggy-Back plant

  11. Piggyback Plant

  12. 3. PRODUCTION OF PLANTLETS FROM OFFSETS • An offset is a tiny plantlet that develops as a side shoot at the base of the parent plant • Sometimes different offsets are produced and these then form a clump at the base of the parent plant • An example of this is the Mother-in-law’s Tongue plant

  13. Mother-In-Law’s Tongue Plant

  14. METHODS OF PROPAGATING OFFSETS • A plant with offsets can be propagated by division • This means separating the offsets from the parent, normally using a sharp knife • The offsets can then be planted in new locations

  15. Offsets of Mother-In-Law’s Tongue

  16. Advantages of Vegetative Propagation • Exact copies of parent plants can be produced in most cases • Often simple and relatively quick • Large plants can sometimes be produced in a short period of time • Good quality and uniformity among plants produced

  17. Disadvantages of Vegetative Propagation • All offspring share common susceptibility to disease • Not suitable if variation is desired

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