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Protoplasts in tobacco leaf cells

Protoplasts in tobacco leaf cells

B060/0004

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY. DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY.

Caption

Light micrograph of protoplasts from a tobacco leaf, Nicotiana plumbaginifolia, showing cells from the mesophyll layer. A protoplast is a single intact cell, which has been chemically treated to remove the tough outer cellulose wall, leaving only the delicate plasma membrane binding the cell contents into a whole. The cell wall can later be regrown. The mesophyll layer contains numerous chloroplasts (green), the sites of photosynthesis. Protoplasts, being easier to manipulate, are used in plant genetic engineering; experiments in hybridization & disease resistance Protoplast technology is pertinant also to biotechnology & medicine. Mag: X175 (35mm).

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