Andrey V Malyshev, Gesche Blume-Werry, Ophelia Spiller, Marko Smiljanić, Robert Weigel, Alexander Kolb, Byron Ye Nze, Frederik Märker, Freymuth Carl-Fried Johannes Sommer, Kinley Kinley, Jan Ziegler, Pasang Pasang, Robert Mahara, Silviya Joshi, Vincent Heinsohn, Juergen Kreyling
Climate warming advances the onset of tree growth in spring, but above- and belowground phenology are not always synchronized. These differences in growth responses may result from differences in root and bud dormancy dynamics, but root dormancy is largely unexplored. We measured dormancy in roots and leaf buds of Fagus sylvatica and Populus nigra by quantifying the warming sum required to initiate above- and belowground growth in October, January and February. We furthermore carried out seven experiments, manipulating only the soil and not air temperature before or during tree leaf-out to evaluate the potential of warmer roots to influence budburst timing using seedlings and adult trees of F...
October 27, 2023: New Phytologist