Question

Why do some seeds undergo a period of dormancy, and how do they break dormancy?

   Why do some seeds undergo a period of dormancy, and how do they break dormancy?

Biology

Mary Ann Clark, Jung… 2nd Edition

Chapter 32, Problem 20

Instant Answer

Solved by Expert Kayla Scholl

06/05/2020

Step 1

It is a period during which the seed remains inactive and does not germinate even under favorable conditions. This dormancy period allows the seed to survive harsh environmental conditions such as extreme temperatures or drought. Show more…

Show all steps

lock

Thanks for your feedback!

Why do some seeds undergo a period of dormancy, and how do they break dormancy?

Play audio

Feedback

Powered by NumerAI

Kayla Scholl and 73 other subject Biology educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Seed Dormancy

Seed dormancy is a survival strategy where seeds remain in an inactive state even under seemingly favorable conditions, preventing premature germination. This mechanism involves physiological and biochemical processes that delay growth until environmental conditions are optimal for seedling survival.

Adaptive Significance of Dormancy

Dormancy is an adaptive trait that increases the chances of seed survival by preventing germination during periods that would not support successful growth. It acts as a bet-hedging strategy to spread out the risk over time, ensuring that some seeds germinate when conditions are most favorable.

Dormancy-Breaking Mechanisms

Seeds overcome dormancy through various mechanisms that involve changes in their physiological state. These mechanisms include stratification, where exposure to prolonged cold or moisture weakens inhibitory signals, and scarification, where physical or chemical processes alter the seed coat to allow water uptake and gas exchange, ultimately triggering germination.

Environmental Cues and Germination

Environmental factors such as temperature fluctuations, moisture levels, and light conditions serve as signals to break dormancy. These cues help the seed assess the surroundings and ensure that germination occurs only when the environment is likely to support growth and development.

Recommended Videos

Transcript

Ace is your personal tutor. It breaks down any question with clear steps so you can learn.

Start Using Ace

Continue solving this problem

Create a free account to:

View full step-by-step solution
Ask follow-up questions with Ace AI
Save progress and study later