Tag Archive for 'Trichome'

$Stinging nettles of the genus Dendrocnide produce potent neurotoxins: (A) sign at a North Queensland National Park advising caution around stinging trees; (B) Dendrocnide excelsa petioles are covered in stinging hairs; (C) scanning electron micrograph of trichome structure on the leaf of Dendrocnide moroides; (D-G) cutaneous reaction resulting from an accidental sting with Dendrocnide moroides documented with an iPhone XR and NEC G120W2 thermal imager, illustrating almost immediate local piloerection (arrowheads in D), development of wheals where stinging hairs penetrate the skin (arrows in E), as well as a long-lasting axon reflex erythema (arrows in F and G) and associated local increase in skin temperature (degrees Celsius); (H) HPLC chromatogram of trichome extract from Dendrocnide excelsa; diamonds indicate nocifensive responses elicited by intraplantar administration of individual fractions in vivo in C57BL6/J mice, with a single late-eluting peak identified as the main pain-causing fraction. Image credit: Irina Vetter, Thomas Durek & Darren Brown, University of Queensland.$

Australian Stinging Trees Make Spider- and Cone Snail-Like Venom

Sep 18, 2020 by News Staff

A team of scientists from the University of Queensland and King’s College London has found that the venom of Australian Dendrocnide trees contains previously...