Science Source Stock Photo - Open stoma on tobacco leaf

Open stoma on tobacco leaf

Description: False-colour scanning electron micrograph of an open stoma, or pore, on the surface of a leaf of the tobacco plant, Nicotiana tabacum. Stomata are breathing pores scattered over the surface of the leaves, & sometimes the stem, of plants. They regulate the exchange of gases between the leaf's interior & the atmosphere. The closing of stomata is a natural response to darkness or drought, & is a means of conserving water. Each pore is controlled by two guard cells, one on each side. When the guard cells are full of water, the pore is open; when they dry out, the pore closes. Magnification: x640 at 6x4.5cm size. JBU colouring: green & yellow. Original is BW print b745/176.

Credit:

Dr Jeremy Burgess/Science Source

Unique identifier: SS2178316

Legacy Identifier: SC4287

Type: Image

Size: 3711px × 2810px (~29 MB)

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