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Article

Impacts of Sodium Arsenite on Wood Microbiota of Esca-Diseased Grapevines

1
UR Œnologie, Université de Bordeaux, ISVV, 33882 Villenave d’Ornon, France
2
IFV, Pôle Rhône-Méditerranée, 30230 Rodilhan, France
3
Laboratoire LVBE, Université de Haute-Alsace, 68000 Colmar, France
4
INRAE, Université Paris-Saclay, AgroParisTech, UMR BIOGER, 78850 Thiverval-Grignon, France
5
Bordeaux Sciences Agro, INRAE, Université de Bordeaux, UMR SAVE, 33170 Villenave d’Ornon, France
6
RIBP EA 4707- USC INRAE 1488, SFR Condorcet FR CNRS 3417, Université Reims Champagne-Ardenne, 51687 Reims, France
*
Author to whom correspondence should be addressed.
Rey and Fontaine, co-last authors.
Academic Editors: David Gramaje and Ales Eichmeier
J. Fungi 2021, 7(7), 498; https://doi.org/10.3390/jof7070498
Received: 26 May 2021 / Revised: 14 June 2021 / Accepted: 16 June 2021 / Published: 22 June 2021
Although sodium arsenite was widely used in Europe until its ban in 2003, its effects on microorganisms is not clearly understood. To improve our understanding of sodium arsenite curative effect on GTDs, grapevines displaying esca-foliar symptoms from different French regions (Alsace, Champagne, Languedoc) were treated or not with sodium arsenite, and analyzed for their wood microbiota. Using metabarcoding, we identified the fungal and bacterial taxa composition of microbiota colonizing woody trunk tissues. Large differences in fungal microbiota composition between treated and untreated grapevines were observed while no major impacts were observed on bacteria microbiota. The main fungal species detected in untreated necrotic woody tissues was Fomitiporia mediterranea (63–94%), a fungal pathogen associated with esca. The relative abundance of this fungal species significantly decreased after sodium arsenite treatment in the three vineyards, in particular in white-rot necrotic tissues and their borders (−90%). F. mediterranea was the most sensitive to sodium arsenite among fungi from grapevine woody tissues. These results strongly suggest that the effect of sodium arsenite on GTDs is due to its ability to efficiently and almost specifically eliminate F. mediterranea from white-rot necrotic tissues, allowing saprobic fungi to colonize the tissues previously occupied by this pathogenic fungus. View Full-Text
Keywords: fungicide; trunk disease; white rot; Fomitiporia mediterranea; metabarcoding fungicide; trunk disease; white rot; Fomitiporia mediterranea; metabarcoding
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MDPI and ACS Style

Bruez, E.; Larignon, P.; Bertsch, C.; Robert-Siegwald, G.; Lebrun, M.-H.; Rey, P.; Fontaine, F. Impacts of Sodium Arsenite on Wood Microbiota of Esca-Diseased Grapevines. J. Fungi 2021, 7, 498. https://doi.org/10.3390/jof7070498

AMA Style

Bruez E, Larignon P, Bertsch C, Robert-Siegwald G, Lebrun M-H, Rey P, Fontaine F. Impacts of Sodium Arsenite on Wood Microbiota of Esca-Diseased Grapevines. Journal of Fungi. 2021; 7(7):498. https://doi.org/10.3390/jof7070498

Chicago/Turabian Style

Bruez, Emilie, Philippe Larignon, Christophe Bertsch, Guillaume Robert-Siegwald, Marc-Henri Lebrun, Patrice Rey, and Florence Fontaine. 2021. "Impacts of Sodium Arsenite on Wood Microbiota of Esca-Diseased Grapevines" Journal of Fungi 7, no. 7: 498. https://doi.org/10.3390/jof7070498

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