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Conséquences de défoliations tardives sur l'état sanitaire des chênes sessiles et pédonculés. Rapport final

Abstract : Carbohydrate content is a key component for oak survival to disease and to tolerate stresses such as defoliation. The study was performed with adult oaks defoliated by a caterpillar (Thaumatopoea processionea) in 200e. Consequences of this defoliation on stored carbohydrates was quantified using both a visual technique for determining iodine-staining of starch and an enzymatic method allowing starch, glucose, fructose and sucrose quantification. The defoliation strongly reduced starch content in defoliated oaks as compared to nondefoliated ones. Visual assessment of starch was calibrated against enzymatic measurements to predict both starch and total carbohydrate contents. Finally, we showed that starch content during autumn following the defoliation was suitable to predict oak survival and crown status during the next spring
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https://hal.inrae.fr/hal-02833418
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Submitted on : Sunday, June 7, 2020 - 8:07:09 AM
Last modification on : Wednesday, September 8, 2021 - 4:02:09 PM

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  • HAL Id : hal-02833418, version 1
  • PRODINRA : 29721

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Nathalie Bréda, Benoit Marçais, Olivier Cael, Lionel Lhoste, Francois Geremia, et al.. Conséquences de défoliations tardives sur l'état sanitaire des chênes sessiles et pédonculés. Rapport final. [Contrat] 2003. ⟨hal-02833418⟩

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