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Comparative methods to identify variations in membrane fatty acids reflecting microbial community differences.

Petra Lovecká1, Blanka Vrchotová2, Anna Košinová3

  • 1University of Chemical Technology Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Technicka 3, 166 28, Prague, Czech Republic.

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Summary

Fatty acid methyl ester (FAME) profiling reveals seasonal and spatial shifts in grapevine endophytic microbes. Plant organ and season significantly impact microbial communities, offering insights for sustainable viticulture and plant health monitoring.

Keywords:
Endophytic microorganismsMemrane fatty acidsVitis vinifera

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Area of Science:

  • Microbiology
  • Plant Science
  • Analytical Chemistry

Background:

  • Endophytic microbial communities play crucial roles in plant health and stress response.
  • Understanding seasonal and spatial dynamics of these communities is vital for sustainable agriculture.
  • Fatty acid methyl ester (FAME) profiling offers a cultivation-independent method for microbial analysis.

Purpose of the Study:

  • To apply FAME profiling for monitoring seasonal and spatial dynamics of grapevine endophytic microbial communities.
  • To investigate the influence of plant organ type, season, and farming systems on these communities.
  • To establish a rapid method for assessing endophytic community shifts in Vitis vinifera.

Main Methods:

  • Gas chromatography with flame ionization detection (GC-FID) was used for FAME quantification.
  • Samples included leaves and stems from four grapevine varieties.
  • Sampling occurred across different seasons and farming systems (biodynamic vs. conventional).

Main Results:

  • Plant organ type and season were identified as the primary drivers of endophytic community composition and abundance.
  • Spring leaves exhibited the highest microbial levels, while winter stems showed the lowest.
  • FAME profiling demonstrated significant differences influenced by season and organ.

Conclusions:

  • FAME profiling is a rapid, cultivation-independent tool for monitoring grapevine endophytic communities.
  • This method can detect shifts in microbial communities, aiding plant health monitoring.
  • Findings support the evaluation of sustainable viticulture practices and beneficial plant-microbe interactions.