Conventional and alternative pest management strategies: a comparative proteomic study on musts
In a context of sustainable agriculture, “agroecological immunity” is an emerging concept to reduce the use of chemical pesticides to protect crops against pathogens. This alternative strategy aims to combine different levers including the use of “bio”solutions. These include biocontrol products, some of which being plant defense elicitors, as well as products authorized in organic farming such as copper or sulfur. In vineyards, depending on climate conditions, powdery and downy mildews can be devastating diseases. So, to guarantee the yield and quality of the harvest, it is usually necessary to treat vines against these diseases from the 5/6-leaf stage to the bunch closure stage. In the present study carried out on a Chardonnay plot located at Lugny (Mâconnais Vineyard, France), we compared, the conventional vineyard protection strategy to the alternative one using “bio” solutions. The latter included the use of copper/sulfur and phosphonate or Bacillus-based products. For the two studied vintages (2020 and 2021), up to 8 treatments were applied whatever the protection strategy used. Besides the evaluation of the protection efficacy against downy and powdery mildews, we performed proteomic analyses (LC-MS/MS) to assess the impact of these two crop protection strategies on must quality. Among the 1041 proteins analyzed, 215 were significantly differentially expressed and the clustering analysis allowed to distinguish the two vintages rather than the protection management strategies. At last, a label-free quantification of proteins using spectral counting was performed from 2021 vintage and finally revealed that less than 2% of proteins were significantly differentially expressed between the two-pest management used.
Acknowledgements: We acknowledge F. Bidaut (Vinipôle Sud Bourgogne, Mâcon, France).
Issue: ICGWS 2023
1Agroécologie, CNRS, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Dijon, France.
2 Laboratoire de Spectrométrie de Masse Bio-Organique (LSMBO), IPHC, Univ. de Strasbourg, CNRS, Strasbourg, France.
Ϯ: co- first authors
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biocontrol, grapevine protection, proteomic analysis, vineyard