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Biology /Germination and Seed Dormancy

Germination and Seed Dormancy

Biology10 CardsCreated about 2 months ago

This deck covers the types of germination, factors affecting seed dormancy, and seed viability. It includes definitions, examples, and key concepts related to plant germination processes.

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What are the two types of germination?

Epigeal and hypogeal germination.

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Key Terms

Term

Definition

What are the two types of germination?

Epigeal and hypogeal germination.

What characterizes epigeal germination?

In epigeal germination, the cotyledons are pushed above the ground by elongation of the hypocotyl.

Which seeds commonly undergo epigeal germination?

Beans, sunflower, castor oil, and groundnut seeds.

What is hypogeal germination?

A type of germination where the cotyledons remain underground due to elongation of the epicotyl.

Name examples of seeds that undergo hypogeal germination.

Maize, sorghum, and millet seeds.

What is seed dormancy?

A state where a seed carries out minimum metabolism and does not germinate.

List two causes of seed dormancy.

Hard testas and chemical substances like abscisic acid (ABA).

How can seed dormancy be broken?

Through scarification, soaking in water, fire, and exposure to specific environmental conditions.

What is seed viability?

The ability of a seed to germinate into a seedling.

What factors can reduce seed viability?

Prolonged storage, high temperatures, physical damage, parasites, and pests.

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Germination and Seed Dormancy

Term	Definition
What are the two types of germination?	Epigeal and hypogeal germination.
What characterizes epigeal germination?	In epigeal germination, the cotyledons are pushed above the ground by elongation of the hypocotyl.
Which seeds commonly undergo epigeal germination?	Beans, sunflower, castor oil, and groundnut seeds.
What is hypogeal germination?	A type of germination where the cotyledons remain underground due to elongation of the epicotyl.
Name examples of seeds that undergo hypogeal germination.	Maize, sorghum, and millet seeds.
What is seed dormancy?	A state where a seed carries out minimum metabolism and does not germinate.
List two causes of seed dormancy.	Hard testas and chemical substances like abscisic acid (ABA).
How can seed dormancy be broken?	Through scarification, soaking in water, fire, and exposure to specific environmental conditions.
What is seed viability?	The ability of a seed to germinate into a seedling.
What factors can reduce seed viability?	Prolonged storage, high temperatures, physical damage, parasites, and pests.