Variation in Bud Exudate Composition of Populus nigra Assessed by Gas Chromatography-Mass Spectrometry

Abstract

Abstract Bud Exudate, GC-MS Bud exudates from twelve clones of Populus nigra originating from seven countries were analyzed by gas chromatography-mass spectrometry and the principal compounds identified. Specimens of P. nigra var betulifolia differed in bud exudate com position from the other specimens analyzed, and were more similar in exudate com position to P. deltoides than were the other specimens. The range of bud exudate com position was greater than that which would be expected to occur within a single coherent species.