Episode 150: Plants Under Pressure: How Stress Shapes Secondary Metabolites (w/ Dr. José Leme)
Plants don’t just endure stress—they use it. In this episode, Dr. José Leme joins me to explore how mechanical vibration, super cropping, and controlled water restriction affect plant physiology, trichome density, and secondary metabolite production. We also break down recent research on jasmonates, drought signaling, and why your method of measuring trichomes matters more than you think.
Cannabis Cultivation and Science Podcast · Dr. Jose Leme, Tad Hussey, KiS Organics
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Show Notes
Can stress actually improve flower quality? In this episode, I sit down with Dr. José Leme to dive into the science of plant stimuli and how growers can apply it in practice. We cover:
🌿 Mechanical cues — how super cropping and vibration trigger plant defense pathways.
💧 Water restriction — why moderate, timed drought can shift carbon toward secondary metabolites like terpenes and cannabinoids.
🧪 Jasmonates (MeJA) — when they increase trichome density, and what trade-offs you need to consider.
🔬 Trichome measurement pitfalls — why bracts are the gold standard for consistent data.
🌱 Propagation & trial design — the importance of clonal fidelity and standardized protocols when testing stress strategies.
Dr. Leme and I also highlight practical guardrails for growers: cultivar differences, timing, and the “sweet spot” between beneficial stress and damaging stress.
📄 Referenced Studies:
Water Deficit Stress and Secondary Metabolites
Jasmonates in Growth, Trichomes, and Cannabinoids
Metabolic Responses to Water Deficit
Trichome Sampling & Quantification Methods
Trigonelline as a Biomarker for Drought Stress (Preprint)
Propagation & Clonal Fidelity in Cannabis Research
Additional vibration study discussed in the episode.
🎧 Whether you’re a grower, consultant, or researcher, this conversation will give you a framework for using stress not as a risk—but as a precision tool to enhance plant quality.
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