LIFESCI 2A03 Lecture Notes - Lecture 3: Blastema, Salamander, Cell Potency
26 Feb 2015
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Plant cutting is a technique used to produce a clone of a plant (vegetative or asexual reproduction) A whole adult plant can regrow from apiece of a plant: a piece of stem or leaf or root. Differentiated root cells from a carrot plant can regrow into an entire plant. E. g. regeneration in the root (arabidopsis root regeneration) Can also study regeneration at the cellular level. A few invertebrates with simple body plans demonstrate bidirectional regeneration where both cut sires can regenerate. In fact, this is really a process of clonal reproduction. Examples of animals with radial symmetry: hydras, sea stars, and anemones. Bidirectional regeneration: the ability to regenerate whole bodies from small tissue fragments. Hydra cut in half - two new hydra that are smaller will regenerate - each can than grow to the original size through cell division. Planaria: non- parasitic flatworm that exhibits an extraordinary regeneration. Muscular contraction to limit size of cut surface.
