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Anatomy and Physiology /Germination and Seed Dormancy

Germination and Seed Dormancy

Anatomy and Physiology10 CardsCreated 6 days ago

This deck covers the types of germination, seed dormancy, and seed viability, including key concepts and examples.

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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 typically undergo epigeal germination?

Beans, sunflower, castor oil, and groundnut seeds.

What is the role of cotyledons in epigeal germination?

They carry out photosynthesis before the leaves develop fully.

What characterizes hypogeal germination?

In hypogeal germination, the cotyledons remain underground due to elongation of the epicotyl.

Which seeds typically undergo hypogeal germination?

Monocotyledonous seeds such as maize, sorghum, and millet.

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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 typically undergo epigeal germination?	Beans, sunflower, castor oil, and groundnut seeds.
What is the role of cotyledons in epigeal germination?	They carry out photosynthesis before the leaves develop fully.
What characterizes hypogeal germination?	In hypogeal germination, the cotyledons remain underground due to elongation of the epicotyl.
Which seeds typically undergo hypogeal germination?	Monocotyledonous seeds such as maize, sorghum, and millet.
What is seed dormancy?	A state where a seed carries out minimum metabolism and does not germinate.
Name 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, or exposure to environmental conditions.
What is seed viability?	The ability of a seed to germinate into a seedling.