Pine tree needle, light micrograph
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Pine tree needle, light micrograph
Pine tree needle. Polarised light micrograph of a cross-section through a needle from a Pinus pine tree. This leaf is needle-like in order to reduce water loss (transpiration). The epidermis (deep green) consists of thick-walled cells covered with a layer of cuticle (red). Below the epidermis is the mesophyll (green and orange), which includes the resin canals (green and red circles). The central oval is the vascular cylinder, surrounded by the endodermis (white). Magnification: x195 when printed at 10 centimetres across
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6333967
© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY
Cellular Cross Section Cuticle Endodermis Mesophyll Needle Pine Pinus Polarised Light Micrograph Polarised Light Microscopy Polarized Resin Tissue Transpiration Transverse Cells Light Micrograph Light Microscope Section Sectioned Semi Circle
EDITORS COMMENTS
This stunning print captures the intricate details of a pine tree needle in all its glory. Under polarised light, we are able to witness the fascinating structure and adaptations that enable this leaf to thrive in its environment. The deep green epidermis consists of thick-walled cells, providing strength and protection for the delicate inner layers. A vibrant layer of cuticle, depicted in red, further shields against water loss through transpiration. Beneath the epidermis lies the mesophyll, showcased in shades of green and orange. This vital tissue contains resin canals represented by captivating green and red circles, which play a crucial role in defense mechanisms within the pine tree's biology. At the center of this cross-section is the vascular cylinder - an oval-shaped region responsible for transporting essential nutrients throughout the plant. Surrounding it is the endodermis portrayed as white; it acts as a barrier regulating nutrient absorption. With a magnification level of x195 when printed at 10 centimeters across, this image allows us to appreciate nature's microscopic wonders up close. It serves as a reminder that even seemingly ordinary elements like pine needles possess extraordinary complexity when observed under scientific lenses.
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