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Communication Dans Un Congrès Année : 2008

Cambium activity and phenology in temperate dicotyledon trees

Anais A Boura
Elise Tancoigne

Résumé

In mid latitude, there is a strong relationship between plant phenology, especially spring events (budding, leafing, flowering) and some environmental factors especially photoperiod and temperatures. In the same time, it exists a close connection between phenology and cambial activity. In order to better understand this link, the wood formation and phenology of three dicots trees (Castanea sativa Mill., Fagus sylvatica L. and Corylus avellana L.) with different life cycle (time of flowering, leafing ...) was followed between 2005 and 2007, in two French sites. In each area, wood from both trunk and newly formed branches were harvested and prepared, and on the same time, phenological data were recorded throughout the growing season. Results obtained from repeated cell analysis showed a relatively short cambial activity period for the three species divided in three step; a slow beginning, followed by a fast growth in the middle of the vegetation period and a decreasing wood formation activity towards the end of the period. No time-lag could be detected between sites whereas differences between species, especially in cambial reactivation were noticed. Indeed, in Castanea sativa the beginning of wood formation is very rapid and occurs simulteanously throughout the entire tree (branches/trunk) a few days prior to bud break. On the contrary, in Fagus sylvatica and Corylus avellana, cambial reactivation seems to begin at the base of the swelling buds and then proceeds downward the base of the tree. These differences may reflect alternative designs of growth and survival, especially in sap conduction and refilling of vessels after the winter for species with different wood porosity patterns.
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Dates et versions

hal-03665586 , version 1 (13-05-2022)

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  • HAL Id : hal-03665586 , version 1

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Anais A Boura, Elise Tancoigne, Dario De Franceschi. Cambium activity and phenology in temperate dicotyledon trees. Tree Rings in Archaeology, Climatology and Ecology, Apr 2008, Zakopane, Poland. ⟨hal-03665586⟩
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