Editing Calluna (section)

=== Chemistry ===
[[Phenolic compound]]s in the shoots of ''Calluna vulgaris'' include [[chlorogenic acid]] and a novel phenolic glycoside, most of which are found in greater number during the summer.<ref>{{cite journal |author=Mahbubul, A.F. Jalal |author2=David J. Read |author3=E. Haslam |author3-link=Edwin Haslam |year=1982 |title=Phenolic composition and its seasonal variation in Calluna vulgaris |journal=Phytochemistry |volume=21 |issue=6 |pages=1397–1401 |doi=10.1016/0031-9422(82)80150-7|bibcode=1982PChem..21.1397J }}</ref>

The [[nectar]] of ''Calluna vulgaris'' contains a megastigmane, callunene, that is inhibitory at naturally occurring concentrations to a common [[Trypanosomatida|trypanosome]] parasite of bumble bees, ''[[Crithidia bombi]]''.  Koch et al. elucidate the mechanism of activity that results in the loss of the parasite's flagellum, leading to reduced infectivity, because the flagellum is crucial to anchoring in the insect gut.<ref>{{cite journal |author=Koch, H. |author2=Woodward, J. |author3=Langat, M. |author4=Brown. M.J.F. |author5=Stevenson P.C. |date=2019 |title=Flagellum Removal by a Nectar Metabolite Inhibits Infectivity of a Bumblebee Parasite |journal=Current Biology |volume=29 |issue=20 |pages=3494–3500 |doi=10.1016/j.cub.2019.08.037 |pmid=31607528 |doi-access=free|bibcode=2019CBio...29E3494K }}</ref>