Bacterial microbiota dynamics of Cannabis sativa L. under biotic stress induced by Tetranychus urticae.
Alman PL, De Urraza P, Coppotelli B, Colman D, Bernardo V
Soil Health
Same invisible soil bacteria that help your garden plants thrive can be knocked off balance by a pest infestation — meaning a bug problem above ground quietly sabotages the living ecosystem below ground that your plants depend on.
Scientists found that when tiny spider mites attack cannabis plants, the community of helpful bacteria living in the soil around the roots changes dramatically. The bacteria that normally help plants grow and stay healthy get crowded out by tougher, more stress-tolerant microbes that don't offer the same benefits. This underground ripple effect happens across the whole growing season and could explain why pest-stressed plants struggle to recover even after the pests are gone.
Key Findings
Spider mite (Tetranychus urticae) infestation caused measurable shifts in the rhizosphere bacterial community across all three growth stages — early vegetative, late vegetative, and late flowering.
Under mite stress, bacteria associated with plant growth promotion declined, replaced by communities favoring resource recycling and metabolic flexibility rather than active plant support.
Functional predictions showed that healthy plant rhizospheres had higher metabolic activity enriched in replication, transcription, and protein synthesis pathways, while stressed rhizospheres shifted toward survival-mode functions.
chevron_right Technical Summary
Spider mite infestations on cannabis plants disrupt the beneficial soil bacteria community, replacing growth-promoting microbes with stress-tolerant but less helpful ones. This shift also affects the plant's chemical profile, with implications for both agriculture and medicine.
Abstract Preview
The microbiota associated with Cannabis sativa L. plays a crucial role in plant growth and health, although the mechanisms by which it is modulated in response to different types of stress during c...
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Cannabis sativa is an annual herbaceous flowering plant. The species was first classified by Carl Linnaeus in 1753. The specific epithet sativa means 'cultivated'. Indigenous to Eastern Asia, the plant is now of cosmopolitan distribution due to widespread cultivation. It has been cultivated throu...