Ivy stem, LM

Numéro d’image : 13445247
Ivy stem, LM
Ivy stem. Light micrograph (LM). Hedera, commonly called ivy, is a genus of 12â??15 species of evergreen climbing or ground-creeping woody plants in the family Araliaceae. Ivy has a dicot stem vascular arrangement. Vascular tissues transport water and dissolved substances inside the plant and helps support the stem. The two types of vascular tissue are xylem and phloem. Xylem carries water and dissolved ions from the roots to stems and leaves. Phloem carries dissolved sugars from the leaves to all other parts of the plant. Xylem has two kinds of conducting cells, tracheids and vessel elements. Ground tissue of the stem (called pith and cortex) develops support cells to hold the young plant upright. The dicot stem has a distinct ring of vascular bundles. Magnification: x10 when printed at 10 centimetres wide.
Licence : Droits gérés
Crédit: Science Photo Library / Gschmeissner, Steve
Taille de l’image : 4572 px × 4338 px
Model Release : Non requis
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