TAILIEUCHUNG - Báo cáo lâm nghiệp: "Interactive effects of drought and pathogens in forest trees"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Interactive effects of drought and pathogens in forest trees. | Ann. For. Sci. 63 2006 597-612 INRA EDP Sciences 2006 DOI forest 2006040 597 Review Interactive effects of drought and pathogens in forest trees Marie-Laure DESPREZ-LOUSTAUa Benoit MARỌAISb Louis-Michel NAGELEISENc Dominique Pioua Andrea VANNINId a INRA Bordeaux UMR BIOGECO Équipe de pathologie forestiere Domaine de la Grande Ferrade BP81 33883 Villenave d Ornon Cedex France b INRA Nancy UMR IaM Équipe de pathologie forestiere Champenoux 54280 Seichamps France c Ministère de l Agriculture de la Pêche et des Affaires Rurales Département Santé des Forets Champenoux 54280 Seichamps France d University of Tuscia Department of Plant Protection Via S. Camillo de Lellis 01100 Viterbo Italy Received 14 October 2005 accepted 28 April 2006 Abstract - This review synthesizes the available knowledge on drought-disease interactions in forest trees with a focus on 1 evidence and patterns of drought-disease interactions 2 current understanding of processes and mechanisms and 3 three well documented cases studies. The first part is based on the analysis of a database of slightly more than one hundred studies obtained by keyword searches combining drought diseases or pathogens and forest trees. A large majority of published studies referred to a positive association between drought and disease . disease favoured by drought or drought and disease acting synergistically on tree health status with a predominance of canker dieback diseases caused by pathogens like Botryosphaeria Sphaeropsis Cytospora and Biscognauxia Hypoxylon . The type of disease-related variables incidence vs. severity and the intensity and timing of water stress were shown to be significant factors affecting the drought- infection interaction. Interactions with other abiotic stresses and species-specific and genetic effects related to host or pathogen have also been reported. Direct effects of drought on pathogens are generally negative although most fungal pathogens exhibit an important plasticity and .

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