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Plantlets PowerPoint Presentation

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Plantlets Presentation Transcript

Slide 1 - PLANTLETS Intermediate 1 Biology
Slide 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
Slide 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
Slide 4 - 1. PRODUCTION OF PLANTLETS FROM RUNNERS Some types of plants produce plantlets at the end of ‘horizontal’ stems called runners.
Slide 5 - Spider plant
Slide 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
Slide 7 - PRODUCTION OF PLANTLETS FROM RUNNERS
Slide 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
Slide 9 - Mexican Hat Plant
Slide 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
Slide 11 - Piggyback Plant
Slide 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
Slide 13 - Mother-In-Law’s Tongue Plant
Slide 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
Slide 15 - Offsets of Mother-In-Law’s Tongue
Slide 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
Slide 17 - Disadvantages of Vegetative Propagation All offspring share common susceptibility to disease Not suitable if variation is desired
Slide 18 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.