Question

Which of the following methods is used to overcome seed dormancy?

• A. Light
• B. All of the above
• C. Changing the environmental conditions
• D. Temperature

Answer 1

The correct option is B All of the above

Seed dormancy
Seed dormancy is a condition during which the seed is unable to germinate. In this condition the metabolic rate of an embryo is very low and the process of growth and development remains completely suspended. Examples include Phaseolus (wild bean),Cassia (golden shower) etc.

Generally seed dormancy is triggered by unavailability of favourable conditions.
Common factors break seed dormancy
The common factors that break seed dormancy are as follows:
Light
Temperature
Changing the environmental conditions
Light
Seeds that are stimulated to germinate by light are called photoblastic seeds. Exposure to light can break seed dormancy and initiate germination in these seeds. Examples include Poa pratensis (Kentucky bluegrass).
Temperature
Depending on the plant variety, exposure to heat or low temperature can help to break dormancy. Temperature for seed germination ranges between -1 °C to 15°C.
Environmental conditions
Seed dormancy can be broken by favourable environmental conditions like proper temperature, oxygen, water availability and humidity etc.
Final answer
(D) All of the above