Does past emergence of epicormic shoots control current composition of epicormic types?

Abstract

International audienc

Observation of Quercus petraea epicormics with X-ray CT reveals strong pith-to-bark correlations: Silvicultural and ecological implications

“…The Longchamp stands seem to behave somewhat according to this trend. This is probably because although 1960 is the accepted fullmast year of tree origin, it is suspected that 1949 was another fullmast year (Morisset et al, 2012b). Thus, the trees originating from the earlier full-mast could be the oldest trees in our sample.…”

“…The Longchamp experiment was initiated during winter 1987-1988 in order to compare four silvicultural treatments that differed in terms of the final number of crop trees per hectare: 98 trees/ha, 70 trees/ha, 42 trees/ha and a control plot without intervention (Morisset et al, 2012b).…”

“…This can be explained by the younger age of the Montrichard stand and by the very heavy thinning in the RDI0 experiment, resulting in longer branches. These branches that had not yet been pruned still had the capacity to produce secondary buds, even if it was only recently demonstrated (Morisset et al, 2012b) that the majority of buds are set at their base. The population of ''No buds & not pruned'' especially contributes to increasing the population of ''No buds & pruned'' and, to a lesser extent, the ''Buds & pruned'' population.…”

“…Knowing the origin of secondary buds is crucial when predicting their fates. Indeed, it was shown (Morisset et al, 2012b) that the insertion of suppressed buds of secondary origin is not the same for branches as for epicormic shoots. In the first case, insertion of secondary buds does not occur on a strictly transversal plane; conversely, the buds are produced all along the branch knot, up to their proximal end.…”

The CAQ network in France: 15 years of brainstorming and cooperative work to connect forest resources and wood quality through modelling approaches and simulation software

“…Courbet et al (2012) describe a model accounting for branch diameter distribution among growth units of Atlantic cedar (Cedrus atlantica), showing the influence of acrotony. Morisset et al (2012) show that the frequency of epicormic shoots in oak (Quercus petraea and Quercus robur) is strongly dependent on the individual tree, suggesting that silvicultural management should favour the individuals free of epicormics and concentrate on felling those which are prone to their development. De propose a theoretical model of the dynamics of individual shoots based on the renewal theory, to account for stochastic aspects of phytomer production resulting from meristem extension and rest periods, and mortality.…”