noun
- the simplest type of stele in vascular plants, consisting of a solid central core of xylem surrounded by phloem
Usage: botanical
Examples
- Protosteles are found in the roots of most seed plants.
- The fern’s stem contains protosteles with centralized vascular tissue.
- Early vascular plants typically had protosteles as their primary conducting system.
- Students examined cross-sections showing the protosteles in young plant stems.
- The protosteles represent the most primitive arrangement of vascular tissues.
- Botanists study protosteles to understand plant evolution.