White oak leaf,light micrograph

Bildnummer 11675913
White oak leaf,light micrograph
White oak leaf. Light micrograph of a section through the midrib of a leaf from a white oak (Quercus alba) tree. This is a typical mesophyte leaf micrograph upper and lower epidermal layers (red-blue),a cuticle and typical stomata,found only on the lower surface. Under the upper epidermis are two layers of palisade mesophyll (red-violet) with chloroplasts. Beneath this is spongy mesophyll (red) with chloroplasts and large inter-cellular spaces. In the middle of the lamina is the midrib,carrying three large veins surrounded by parenchyma (violet),which are themselves surrounded by fibre/sclerenchyma (pink). Inside the top of the veins is the xylem (pink) with large tracheid cells. The lower veins are the phloem,with sieve tubes (small dark blue
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Wheeler, Dr. Keith
Bildgröße: 5747 px × 3378 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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