LEVEL 04 · LESSON 01
What culture medium does
See it
Culture medium supplies a controlled chemical environment that can include mineral nutrients, a carbon source, vitamins or organic supplements, plant growth regulators, water, and—when a solid or semi-solid system is used—a gelling agent. Composition is selected for the plant material and developmental objective.
Understand it
Medium is part of the biological treatment, not just ‘plant food.’
Different stages can require different media or regulator contexts.
A recipe should preserve source, version, and intended plant/stage.
Important boundary
Never assume a medium that works for one plant or stage is optimal for another.
Try it
Explain the concept in your own words, then identify what plant, explant, stage, units, source, or observation context would need to be preserved before applying it.
Lesson quiz
Apply it
Connect this lesson to an actual MyTCLab record: what fields would you need in order to know later exactly what happened and why?