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Silver birch twig, SEM
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Silver birch twig, SEM
Silver birch twig. Coloured scanning electron micrograph (SEM) of a section through a silver birch (Betula pendula) twig. At the centre of the twig (top centre left) is the pith. Radiating out from the centre are concentric growth rings. Each ring represents one years growth. The majority of the stem consists of xylem tissue, which is made up of larger vessels (holes) and supporting tissue. The xylem transports water and mineral nutrients from the roots throughout the plant. The vessels have thick lignin walls that also provide structural support for the twig. Surrounding the xylem is a ring of cambium (olive green) a layer of actively dividing cells
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Media ID 6290135
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Annual Annular Betula Pendula Brown Cambium Cross Section Growth Ring Growth Rings Lignified Lignin Phloem Silver Birch Structural Support Transport Twig Vessel Vessels Xylem Biochemical False Coloured Sectioned
EDITORS COMMENTS
This print showcases the intricate beauty of a silver birch twig, captured through a coloured scanning electron micrograph (SEM). At first glance, one is drawn to the mesmerizing concentric growth rings radiating from the center of the twig. Each ring represents a year's worth of growth, telling a silent story of the tree's journey through time. The majority of this twig consists of xylem tissue, which acts as an essential transport system for water and mineral nutrients throughout the plant. The larger vessels within the xylem are visible as tiny holes in this image and are surrounded by supporting tissue with thick lignin walls that provide structural support. Surrounding the xylem lies a ring of cambium cells, depicted here in olive green. These actively dividing cells contribute to further growth and development in plants. Together, these elements create a harmonious balance within nature's design. This photograph not only highlights the remarkable complexity found within botanical structures but also serves as a reminder of our interconnectedness with nature. It invites us to marvel at its intricate details while appreciating how plants sustain life on Earth through their biochemical processes. Captured by Science Photo Library using advanced scanning electron microscopy techniques, this false-colored image offers both scientific insight and aesthetic pleasure for those who appreciate the wonders hidden beneath our everyday surroundings.
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