TEM of a protoplast from a tobacco leaf

TEM of a protoplast from a tobacco leaf

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Caption: Transmission electron micrograph of a protoplast from a tobacco leaf, Nicotiana tabacum, (cultivar Xanthi). A protoplst is a single intact cell which has been chemically treated to breakdown the outer cellulose wall (missing here). This protoplast is sectioned to show the organelles within. The numerous dark bodies are chloroplasts, where the process of photosynthesis occurs. The granular body is the nucleus & the eyespot within it is the nucleolus, where the genetic information of the cell is housed. The white, heart-shaped structure is a vacuole, which is smaller than normal in a leaf due to previous evacuolation of the cell. Magnification: X 1090 (35mm), X 7000 (8x10-inch).

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Keywords: botanical science, botany, cell, cells, choloroplast, nicotiana tabacum, nucleolus, nucleus, plant structure, protoplast, tem, tobacco, vacuole

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