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Thornapple seed, light micrograph

Thornapple seed, light micrograph

C019/8200

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55.2 MB (3.9 MB compressed)

3712 x 5197 pixels

31.5 x 43.9 cm ⏐ 12.4 x 17.3 in (300dpi)

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Credit

DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY

Caption

Thornapple seed. Light micrograph of a section through a sunflower (Helianthus annuus) seed. The outer testa and pericarp have been removed from the seed. There is no endosperm because all the nutrients have been absorbed into the embryo. There are two cotyledons with a slit (white, vertical) along three-quarters of the embryo. The cells are full of nutrients, such as starch grains and proteins. At the bottom of the slit is the plumule (triangular, violet) and the apical meristem. Magnification: x5, when printed 10 centimetres high.

Release details

Model release not required. Property release not required.

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