Plant vessels glowing under UV light


Those little pig faces are vascular tissues in a maize plant.


MAGDA TURZANSKA / SCIENCE PHOTO LIBRARY / Getty Images

Like us, plants rely on vessels to transport water and nutrients around tissues. In this cross-section of a maize (Zea mays) stem, cell walls of vascular tissue stained with an ammonium salt berberine glow under ultraviolet light.

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