Female Pine Cone Scale
by Dr Keith Wheeler/science Photo Library
Title
Female Pine Cone Scale
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph - Photograph
Description
Female pine cone scale. Light micrograph of a section through a scale from a young ovulate female Scot's pine (Pinus sylvestris) cone, bearing an ovule (upper right). Each scale supports a lower basal bract scale (top). On the upper ovuliferous scale there is a basal bare ovule (central oval with white space), surrounded by the integument and nucellar tissue (around the ovule), which is pierced by a tube, the micropyle, that enables the pollen to reach the top of the archegonium (circular brown cells) where the egg (ovum) will reside. Magnification: x37 when printed 10 centimetres wide.
Uploaded
September 25th, 2019
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