Common broom stem, light micrograph
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Common broom stem, light micrograph
Common broom stem. Light micrograph of a transverse section through the stem of a common broom (Salicornia europaea) plant. Broom is a drought plant (xerophyte) with ribbed stems and branches to increase the area for photosynthesis. The ribs (spikes) contain spongy mesophyll (pink), similar to a leaf, in the centre and ends of which are supporting bundles of fibres (sclerenchyma, black-brown). The stem has undergone secondary thickening to produce a ring of xylem (dark brown). Above the xylem is the cambium (red ring) and above this is the phloem (red patches). In the centre of the stem is the pith made up of parenchyma cells (pink). Magnification: x46 when printed 10 centimetres wide
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6300459
© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY
Cell Biology Cortex Cytology Epidermis Fibres Parenchyma Phloem Pith Plant Structure Ribbed Ribs Sclerenchyma Spongy Mesophyll Stem Support Supportive Xerophyte Xerophytic Xylem Cells Common Broom Cytisus Scoparius Light Micrograph Light Microscope Section Sectioned
EDITORS COMMENTS
This print showcases the intricate details of a common broom stem, giving us a glimpse into the fascinating world of plant biology. The light micrograph reveals a transverse section through the stem, highlighting its unique features and adaptations. The common broom is known for its ability to thrive in arid conditions, making it a xerophyte or drought plant. Its ribbed stems and branches serve as clever mechanisms to maximize photosynthesis by increasing surface area. These ribs contain spongy mesophyll, resembling leaf tissue, which aids in gas exchange and nutrient absorption. Within the stem's center and ends lie supporting bundles of fibres called sclerenchyma. These black-brown fibers provide structural support to withstand environmental pressures. Additionally, secondary thickening has occurred in the stem, resulting in a ring of dark brown xylem responsible for water transport. Above the xylem lies the cambium layer depicted by a red ring followed by patches of phloem responsible for nutrient distribution throughout the plant. At the core of this remarkable structure lies parenchyma cells forming the pith. This image offers an insight into how plants adapt to their surroundings and utilize various cellular structures for survival. It serves as a testament to nature's ingenuity and resilience while reminding us of our interconnectedness with all living organisms on Earth.
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