80.7 MB (3.6 MB compressed)
4547 x 6204 pixels
38.6 x 52.6 cm ⏐ 15.2 x 20.7 in (300dpi)
DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Heather leaf. Light micrograph of a transverse section through the leaf of a heather (Erica sp.) plant. Heather is a drought plant (xerophyte). Xerophytes have evolved an anatomy that cuts down water loss through transpiration. The epidermis consists of thick-walled cells covered in a thick cuticle (light-pink). Underneath this are the cells of the palisade mesophyll and spongy mesophyll containing chloroplasts where photosynthesis takes place. Magnification: x234 when printed 10 centimetres wide.
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