Sunday, June 25, 2017

3.7: Understand that Plants can Reproduce Asexually by Natural Methods (illustrated by Runners) and by Artificial Methods (illustrated by Cuttings)

ASEXUAL REPRODUCTION: Reproduction by a single parent to produce genetically identical offspring (clones) via Mitosis

RUNNER (NATURAL)
CUTTINGS (ARTIFICIAL)







Diagram showing Asexual Reproduction via Runners




Diagram showing the Asexual Reproduction via Cuttings


  • In Runners, cells split off from parent plant to grow side branches that forms Plantlets, specialising into root hair cells
  • As a result, Plantlets will grow roots and plant will evolve, forming plant that is genetically identical to parent plant via asexual reproduction (clone)


  • In Cuttings, specific plant tissue (typically undifferentiated shoot) is selected from stock plant and sterilised
  • Tissue sample is then explanted and grown in petri dish containing sterile nutrient agar gel
  • Explant is treated with growth hormones (auxins) to stimulate Shoot and Root development
  • As a result, growing Shoot can be continuously divided and separated to form new samples
  • Once Root and Shoot are developed, the cloned plant is then transferred to Soil

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