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Protoplasts in tobacco leaf cells

Protoplasts in tobacco leaf cells

B060/0002

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55.4 MB (55.0 MB compressed)

5431 x 3563 pixels

46.0 x 30.2 cm ⏐ 18.1 x 11.9 in (300dpi)

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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 two different cell types, epidermal (colourless) & mesophyll (green). 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 epidermal cells, a layer at the surface, protect the leaf from external damage. The mesophyll, a layer beneath, contain numerous chloroplasts, sites of photosynthesis. Protoplast cells, being easier to manipulate, are used in plant genetic experimentation. Mag: X125 (35mm).

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