Grass stem, SEM
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Grass stem, SEM
Grass stem. Coloured scanning electron micrograph (SEM) of a section through a grass stem (family Graminaceae). At upper centre is the vascular bundle, which consists of phloem (blue) and xylem tissue. Xylem is composed of annular tracheids (red), pitted vessels (brown), fibrous tracheids (purple) and an intercellular space (round, bottom). The xylem transports water and mineral nutrients from the roots throughout the plant, while the phloem carries carbohydrates and hormones around the plant. The vascular bundle is enclosed in a sheath (dark green) and surrounded by sclerenchyma (yellow thick-walled cells), which is supportive tissue, and parenchyma (yellow thin- walled cells), where the primary plant functions take place
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Media ID 6290779
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Cross Section Epidermis Fibrous Grass Monocot Monocotyledon Parenchyma Phloem Sclerenchyma Sheath Stem Support Tracheid Tracheids Transport Vascular Bundle Vessels Waxy Xylem False Coloured Section
EDITORS COMMENTS
This print showcases the intricate beauty of a grass stem, as captured by a scanning electron microscope (SEM). The false-colored image reveals the inner structure of the stem belonging to the Graminaceae family. At its core lies the vascular bundle, prominently displayed in the upper center. This vital bundle consists of phloem tissue depicted in shades of blue and xylem tissue represented by various hues. The xylem, composed of annular tracheids in red, pitted vessels in brown, fibrous tracheids in purple, and an intercellular space at its bottom edge, serves as nature's transportation system within plants. It efficiently carries water and essential mineral nutrients from roots throughout every part of this remarkable organism. In contrast, phloem tissues transport carbohydrates and hormones across different regions. Enclosed within a dark green sheath for protection is this crucial vascular bundle surrounded by supportive sclerenchyma cells depicted in yellow with thick walls. Additionally present are parenchyma cells shown with thin walls that facilitate primary plant functions. This stunning SEM image not only highlights the structural complexity but also emphasizes nature's ingenuity found even within seemingly ordinary elements like grass stems. With its vibrant colors and meticulous detail, it offers viewers a glimpse into the fascinating world of botany while showcasing Science Photo Library's commitment to capturing breathtaking images from our natural environment.
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