Tissue Culture Basics
This guide covers the essential components of plant tissue culture: culture media, growth conditions, and additives. Use it as a planning reference, then validate recipes and timing against your plant material, lab setup, and published protocol sources.
Culture Media
The culture medium provides water, minerals, vitamins, structure, and energy while plant tissue grows in vitro. Many workflows start from a published base formula such as Murashige & Skoog (MS), Woody Plant Medium (WPM), or a lab-specific variant that has already been tested for the target crop.
Record recipe, batch, pH, sterilization, vessel, plant material, and stage context together. That record makes it easier to compare transfer outcomes, contamination patterns, and growth observations without relying on memory.
- Use distilled water to prepare your medium.
- Add sugar (often sucrose) as an energy source.
- Adjust pH before sterilization (around 5.6—5.8).
- Seal jars tightly and sterilize in a pressure cooker or autoclave.
Media Components to Track
A recipe is easier to review when the major decisions are captured in a consistent way.
Base formulation
Start from a documented tissue-culture medium such as MS, WPM, or a lab-validated variant before making species-specific changes.
Carbon source
Sucrose is commonly used because cultures need an external energy source while they are growing in vitro.
Gelling and texture
Agar or gellan-style agents help create a stable surface. Texture, clarity, and firmness can affect handling and observation.
pH and sterilization
Record pH before sterilization and keep sterilization steps consistent so failed batches are easier to diagnose.
Growth Conditions
Once sealed, your plantlets will grow best in stable, low-stress conditions. Most species prefer:
- Room temperature (20—25 °C)
- Indirect, bright light (avoid direct sun)
- Low air disturbance (no strong drafts)
Additives and Experiments
Optional additives can change growth, rooting, browning, and contamination outcomes. Track them as variables and avoid changing too many at once.
Growth regulators
Auxin and cytokinin balance is highly species- and stage-dependent. Treat any ratio as a starting point to validate, not a guarantee.
Organic additives
Inputs such as coconut water, banana powder, or plant extracts can vary by source and batch. Track them carefully when experimenting.
Activated charcoal
Charcoal may help bind phenolics in some workflows, but it can also bind useful compounds. Note when and why it is used.
Contamination controls
Do not rely on additives to rescue poor sterile technique. Track contamination observations separately from recipe changes.