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Canna~Fangled Abstracts

Efficient Cannabis Propagation with Cytokinin-Free Liquid Media

By April 6, 2025April 13th, 2025No Comments
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doi: 10.3390/plants14071138.

Modified Media for Repeated In Vitro Cutting Cycles of Cannabis sativa Without the Use of Cytokinin

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Abstract

In vitro hedging; combined with the fed-batch liquid media process is an innovative system that generates multiple sterile plants without the use of exogenous cytokinin. This combined process was demonstrated with Cannabis sativa (‘Cherry1’, ‘BaOx’, ‘T1’, ‘Peach’) grown in vessels of three different physical states-stationary agar (A); stationary Oasis® infused with liquid (OILs); and agitated Oasis® infused with liquid (OILa). Vessels were pre-selected as control or supplemented; where supplement vessels received 15 mL DKW liquid media each cycle harvest. The number of shoot tips harvested; shoot length; and dry shoot mass from repeated cutting cycles was recorded. In a single harvest; ‘BaOx’ and ‘Cherry 1’ produced one shoot per plant from the original 15 planted on all treatments. ‘Peach’ and ‘T1’ produced less shoots on average; but the most in OIL treatments.

All shoots harvested were longer in OIL compared to A; regardless of genotype. Over multiple cycles; ‘Peach’ and ‘T1’ were unable to reliably produce shoots on a repeated schedule and were, therefore, eliminated from the experiment. By cycle 3; maximum number of plants were produced; regardless of supplementation (‘Cherry 1’; 30; ‘BaOx’; 22). Shoot length was above 10 mm (planting standard) for both genotypes until after the third cycle (10 weeks) where number and quality decreased (nodes and internodes easily discerned). By the end of the experiment; the only shoots that remained productive for over 16 weeks and multiple repeated harvest cycles were those in OIL treatments with supplements.

Keywords: cannabis, cytokinin, fed-batch, hedging, micropropagation, tissue culture


Key Takeaways:

Cytokinin-Free Multi-Cycle Propagation
This system combines in vitro hedging with a fed-batch liquid media process. It enables the repeated production of sterile Cannabis plants without using exogenous cytokinin. This makes the method more efficient and natural.

Optimal Growth in Liquid Media
Cannabis plants grown in Oasis® infused with liquid media (OIL) consistently produced longer shoots and more dry shoot mass than those grown in traditional agar-based treatments. This shows the superiority of liquid media for promoting plant growth.

Genotypic Differences in Propagation
Different Cannabis sativa genotypes responded uniquely to the propagation system. ‘BaOx’ and ‘Cherry 1’ produced more shoots consistently. However, ‘Peach’ and ‘T1’ struggled to produce shoots in later cycles, making them less reliable for repeated harvests.

Long-Term Viability
The OIL treatment with supplements proved most effective over multiple cycles. Plants remained productive for up to 16 weeks. After 10 weeks, plant quality and shoot production declined in other treatments, highlighting the long-term benefits of this method.

Sustainable Cannabis Propagation
This system offers a sustainable and efficient solution for cannabis propagation. It supports high-quality plant production over multiple cycles, benefiting commercial growers and researchers seeking reliable cannabis cultivation.


Efficient Cannabis Propagation: Cytokinin-free, multi-cycle in vitro system using liquid media for optimal plant growth.Stay informed with the latest scientific insights, evidence-based independent research and discoveries on the ECS, cannabis medicine and more

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