Tag: seed dormancy

Questions Related to seed dormancy

The seed in which dormancy can be broken by red light is

biology plant growth seed dormancy fruit plants: structure and function

  1. Pea

  2. Gram

  3. Lettuce

  4. Castor

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Correct Option: C

Seed dormancy allows the plants to

biology plant growth seed dormancy fruit plants: structure and function

  1. Overcome unfavourable climatic conditions

  2. Develop healthy seeds

  3. Reduce viability

  4. Prevent deterioration of seeds

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Correct Option: A

A method of breaking dormancy and allowing ample absorption of water is

biology plant growth seed dormancy fruit plants: structure and function

  1. Stratification

  2. Scarification

  3. Vernalisation

  4. Devernalisation

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Correct Option: B
Explanation:

A. Stratification: Seeds are moistened and exposed to oxygen for variable period at low or high temperature.

B. Scarification: Hard, impermeable seed coat is weakened or ruptured by filing, chip­ping, abosrbing hot water.

C. Vernalisation- The cooling of seed during germination in order to accelerate flowering when it is planted.

D. Devernalisation- The heating of seed during germination in order to deaccelrating flowering when it is planted.
So, the correct answer is 'Scarification'.

Which one of the following does NOT exhibit seed dormancy?

biology plant growth seed dormancy fruit plants: structure and function

  1. Rhizophoi

  2. Xanthium

  3. Phaseolus

  4. Cassia

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Correct Option: A

Dormancy is induced by.

biology plant growth seed dormancy fruit plants: structure and function

  1. Brassins

  2. Polyrnines

  3. Abscises acid

  4. Indoleacetic acid

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Correct Option: A

Treatment of seed at low temperature under moist conditions to break its dormancy is called -

biology plant growth seed dormancy fruit plants: structure and function

  1. Sclarification

  2. Vernalization

  3. Chelation

  4. Stratification

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Correct Option: D
Explanation:

  • Stratification involves the treatment of seed at low temperature(5−10 C)
under sufficiently moist conditions to break its dormancy and to induce germination. 
  • Scarification involves any damage or breakage of seed coat by physical methods (eg, use of a scalpel, wooden hammer, etc) or chemical methods (use of mild acids) to break seed dormancy. 
  • Vernalization and Chelation is the chill treatment Df plant in its early stages of life history to stimulate or induce early flowering

So, the correct answer is 'Stratification'.

Which method makes the seed coat permeable and allows growth of embryo?

biology plant growth seed dormancy fruit plants: structure and function

  1. Scarification

  2. Stratification

  3. Vernalisation

  4. Denudation

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Correct Option: A
Explanation:

Scarification in the method of weakening and opening the seed coat to initiate germination. It makes seed coat permeable. This method is employed for plant species which are impervious to water and gases.

Thus, the correct answer is 'Scarification'.

Verbalization is used to overcome chemical dormancy in seeds. The temperature range used for this purpose is?

biology plant growth seed dormancy fruit plants: structure and function

  1. Zero to $4$ degrees C

  2. $15$ to $20$ degrees C

  3. $20$ to $30$ degrees C

  4. $30$ to $40$ degrees C

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Correct Option: A

Consider the following statements regarding allelopathy.
a. It is the phenomenon of seed dormancy due to the presence germination inhibitors on the surface of seed coat.
b. It is the phenomenon of the production of organic substances by one plant having handful effect on the other.
c. It helps proper spacing of the plants to reduce competition.
d. It helps the xerophytes to grow in small groups to reduce the transpiration.
Of these statements.

biology plant growth seed dormancy fruit plants: structure and function

  1. $1, 2$ and $3$ are correct

  2. $1$ and $3$ are correct

  3. $2$ and $3$ are correct

  4. $1$ and $4$ are correct

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Correct Option: A

Which one of the folowing phytohrmones is known to contribute to hud dormancy?

biology plant growth seed dormancy fruit plants: structure and function

  1. Ehtylene

  2. Coumarin

  3. Cytokinin

  4. ABA

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Correct Option: A