Flavonoid Aglycones From The Bud Exudates Of Three Betulaceae

Abstract

Ainus koelmei, Betula nigra, O strva carpinifolia, Bud Exudates, Flavonoid Aglycones Bud Exudates of three Betulaceae were analyzed for minor flavonoid aglycones. Three flavonoids not pre viously reported were found in Alnus koehnei, four in Betula nigra. A novel flavonol, morin-3,2',4'-trimethyl ether, is described for O strya carpinifolia.

Identification of Tree Species by Their Defense Compounds: A Study with Leaf Buds of White and Silver Birches

“…In fact, the epicuticular leaf surface flavonoids have successfully been utilized before in distinguishing Betula pendula and Betula pubescens type birch species . Flavonoids are found on the leaf surface of various plants, − and they function as an important part of the chemical defense of plants by protecting plants from excess solar radiation and herbivores, − and act as antioxidants . In addition to flavonoids, other compounds such as terpenoids and coumarins are involved in the chemical defense of plants.…”

Chemodiversity of Exudate Flavonoids, as Highlighted by Selected Publications of Eckhard Wollenweber

“…This was one of the first key questions for Eckhard to ask at the beginning of his scientific career (bud excretions of Populus and Betula [1,2]). "I am sticking to it" said young Eckhard ("Flavonoid aglycones from the bud exudates of three Betulaceae" [3]; "Series of novel flavanones identified by gas chromatography-mass spectrometry in bud exudates of Populus fremontii and P. maximowiczii" [4]). It seems that they got strong buddies after such a long research history.…”