Caption: Foxglove seed surface (Digitalis purpurea), animated coloured scanning electron micrograph (SEM). This image shows the seed coat (or testa) of a foxglove seed (Digitalis purpurea). The testa has an irregular honeycomb-like structure. The purpose of the seed coat structure is to enhance seed germination. The seed coat traps small particles of dust and soil so that when the seed falls to the ground it is anchored and can germinate easily. The testa is mechanically protective and limits entry of solutes into the seed. Foxglove plants are found growing wild in Europe and the USA in woodland and on dry heaths. The leaves are the source of the drug digitalin (a heart drug), for slowing the pulse rate in treatment of heart disease. The flowers are produced on a tall spike, are tubular, and vary in colour with species.

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Foxglove seed surface, SEM

K006/8328 Rights Managed

Downloadable master

Duration: 00:00:15

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 697.4M


Capture format: Digital Rostrum

Frame size: 5712x4538

Codec: JPEG

File size: 697.4M

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