Journal
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
Volume 38, Issue 5-6, Pages 661-678Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00103620701220379
Keywords
Esca disease; rhizosphere; root hypoxia; soil; vines
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In a vineyard soil on Pliocene deposits, bulk and rhizosphere samples of profiles under apparently healthy vines and under those with symptoms of esca were studied for pedological, chemical, and biochemical properties. This study has highlighted soil properties that are negative for plants and rhizosphere microorganisms. Among those, some depend on pedoclimatic conditions (soil erosion, summer cracks, poorly draining conditions), whereas others depend on soil and vine management [scarcity of nutrients and organic matter and an excessive presence of copper (Cu) due to the use of pesticides]. We hypothesize that esca attacks plants in certain areas of a vineyard because the different soil conditions in these areas are negative for one or more of the highlighted properties. Thus, the combination of a depressed soil microbial community and weak plants can result in the loss of the pathogen resistance.
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