SEED STRUCTURE
The first true leaves of the embryo.
What is the plumule?
This is the process of the embryo emerging from the seed.
→ What is germination?
An inactive period protecting seeds from poor weather.
What is dormancy?
Too much of this causes seeds to rot.
What is water?
After imbibition, cells begin making proteins and using food stores.
What is activation of internal physiology (enzyme activation)?
The root portion of the embryo.
What is the radicle?
Seeds must contain living, healthy ____ tissue to germinate.
What is embryo tissue?
Dormancy caused by a thick seed coat.
What is physical dormancy?
Seeds breathe this in during respiration.
What is oxygen?
This emerges first and becomes the root.
What is the radicle?
Seed leaves that act as a food source in beans.
What are cotyledons?
Temperature, moisture, air, and light are examples of these.
What are conditions?
Dormancy caused by plant hormones.
What is chemical dormancy?
Some seeds require this to germinate; others require darkness.
What is light?
The shoot emerges with these attached.
What are cotyledons?
Stored food that feeds the embryo.
What is the endosperm?
The tiny plant inside the seed waiting to sprout.
What is the embryo?
Cold temperatures triggering germination.
What is stratification?
Seeds must germinate within this specific range.
What is temperature range?
After all parts emerge, seedling growth does this.
What is continues?
The protective outer layer of a seed.
What is the seed coat?
Dormancy protects plants by doing this to growth.
What is preventing growth (or stopping development)?
Weakening the seed coat with abrasion or heat.
What is scarification?
The rapid uptake of water that swells the seed coat.
What is imbibition?
These leaves grow above the cotyledons so the plant begins life on its own.
What are true leaves?