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Tea Tree Oil (TTO) shows potential as a sustainable fungicide alternative for roses. It activates plant defense mechanisms in leaves, suggesting a bio-stimulant effect, with minimal impact on petals.

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Area of Science:

  • Plant Science
  • Molecular Biology
  • Sustainable Agriculture

Background:

  • Conventional fungicides pose environmental concerns in floriculture.
  • Tea Tree Oil (TTO) is explored for its potential bio-based antifungal properties.
  • Understanding plant molecular responses to TTO is crucial for sustainable alternatives.

Purpose of the Study:

  • To evaluate Tea Tree Oil (TTO) as a substitute for conventional antifungal treatments in Rosa hybrida.
  • To analyze the molecular responses of rose leaves and petals to TTO application using transcriptomics.
  • To assess TTO's potential as a bio-stimulant and its impact on plant defense pathways.

Main Methods:

  • Transcriptomic analysis of rose leaves and petals after TTO treatment.
  • Gene expression profiling to identify differentially regulated genes.
  • Pathway enrichment analysis to understand molecular mechanisms.

Main Results:

  • Significant transcriptomic shifts observed in rose leaves, with 26 genes upregulated and 1 downregulated.
  • Upregulated genes in leaves are linked to lipid metabolism, cell wall modification, and plant defense.
  • Petals showed a less pronounced response, with few differentially expressed genes, including transcriptional regulators and metabolic enzymes.

Conclusions:

  • TTO acts as a bio-stimulant in rose leaves by activating stress-response pathways.
  • The differential response between leaves and petals suggests systemic transcriptional adjustments are more prominent in vegetative organs.
  • TTO shows promise as a sustainable, bio-based alternative to synthetic fungicides in floriculture.