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Sub-optimal nutrient regime coupled with

Cailun A S Tanney1, Dongmei Lyu1, Timothy Schwinghamer2

  • 1Department of Plant Science, McGill University, Sainte-Anne-de-Bellevue, QC, Canada.

Frontiers in Plant Science
|June 5, 2023
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Summary
This summary is machine-generated.

Plant growth-promoting rhizobacteria (PGPR) can enhance Cannabis cannabinoid yield. Combining PGPR with low nutrient conditions significantly boosts trichome density and cannabinoid production, offering sustainable cultivation strategies.

Keywords:
cannabinoidscannabisinflorescencesinoculationmicrobesnutrientsstereomicroscopytrichomes

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Area of Science:

  • Agricultural Science
  • Microbiology
  • Plant Science

Background:

  • Cannabis sativa cultivation is legally restricted, limiting research into agricultural enhancements.
  • Plant growth-promoting rhizobacteria (PGPR) show potential for improving crop yields.
  • Understanding microbial and environmental interactions is key to optimizing Cannabis production.

Purpose of the Study:

  • To investigate PGPR's effect on Cannabis cannabinoid yield via trichome density.
  • To determine if sub-optimal nutrient conditions influence PGPR efficacy.
  • To explore interactions between PGPR and environmental stressors on plant development and cannabinoid profiles.

Main Methods:

  • Applied Pseudomonas sp. or Bacillus sp. (separately or combined) to Cannabis roots.
  • Utilized a low nutrient regime during early plant development.
  • Quantified stalked glandular trichome density on floral organs using microscopy after 8 weeks of flowering.

Main Results:

  • PGPR with recommended nutrients decreased trichome density; PGPR with low nutrients increased it.
  • Low nutrient conditions enhanced key cannabinoid abundance compared to recommended levels.
  • Bacillus sp. inoculation showed the most significant changes under low nutrient conditions.

Conclusions:

  • PGPR significantly impacts Cannabis trichome development and cannabinoid profiles.
  • Environmental stressors, like low nutrients, can enhance PGPR's positive effects on trichome density.
  • This research suggests sustainable methods for Cannabis production, reducing synthetic fertilizer reliance without compromising yield.