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To preserve seeds that rapidly lose viability, can’t survive dessication and plants which are propagated vegetatively, method employed is :
- a)cryopreservation
- b)agroforestry
- c)gene sanctuary
- d)in - situ conservation
Correct answer is option 'A'. Can you explain this answer?
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To preserve seeds that rapidly lose viability, can’t survive des...
Cryopreservation is the method of preserving living organisms or their parts at extremely low temperature. To preserve seeds that rapidly lose viability and cannot survive desiccation are preserved by this method.
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To preserve seeds that rapidly lose viability, can’t survive des...
Cryopreservation is a method employed to preserve seeds that rapidly lose viability, cannot survive desiccation and plants which are propagated vegetatively. It involves the preservation of living cells and tissues at extremely low temperatures (-196°C) by freezing them in liquid nitrogen. The process of cryopreservation involves the following steps:
1. Selection and preparation of the samples: The samples are selected based on their characteristics and the purpose of preservation. They are then prepared for cryopreservation by treating them with cryoprotectants.
2. Cooling: The samples are cooled down to -196°C using liquid nitrogen. This process is called vitrification, which involves the rapid cooling of the sample to prevent ice crystal formation.
3. Storage: The samples are stored in liquid nitrogen tanks, which prevent any changes in temperature or humidity.
Advantages of cryopreservation:
1. It allows long-term storage of samples without losing viability.
2. It reduces the risk of genetic contamination and loss of genetic diversity.
3. It allows the exchange of genetic material between research institutions.
4. It can preserve endangered species and their genetic diversity.
Disadvantages of cryopreservation:
1. The process of cryopreservation can damage cells and tissues, leading to loss of viability.
2. The cost of maintaining liquid nitrogen tanks is high.
3. The process of cryopreservation requires specialized equipment and expertise.
In conclusion, cryopreservation is a valuable method for the preservation of seeds and plants that cannot be preserved by other methods. It allows for the long-term storage of genetic material and helps in the conservation of biodiversity.
1. Selection and preparation of the samples: The samples are selected based on their characteristics and the purpose of preservation. They are then prepared for cryopreservation by treating them with cryoprotectants.
2. Cooling: The samples are cooled down to -196°C using liquid nitrogen. This process is called vitrification, which involves the rapid cooling of the sample to prevent ice crystal formation.
3. Storage: The samples are stored in liquid nitrogen tanks, which prevent any changes in temperature or humidity.
Advantages of cryopreservation:
1. It allows long-term storage of samples without losing viability.
2. It reduces the risk of genetic contamination and loss of genetic diversity.
3. It allows the exchange of genetic material between research institutions.
4. It can preserve endangered species and their genetic diversity.
Disadvantages of cryopreservation:
1. The process of cryopreservation can damage cells and tissues, leading to loss of viability.
2. The cost of maintaining liquid nitrogen tanks is high.
3. The process of cryopreservation requires specialized equipment and expertise.
In conclusion, cryopreservation is a valuable method for the preservation of seeds and plants that cannot be preserved by other methods. It allows for the long-term storage of genetic material and helps in the conservation of biodiversity.
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To preserve seeds that rapidly lose viability, can’t survive dessication and plants which are propagated vegetatively, method employed is :a)cryopreservationb)agroforestryc)gene sanctuaryd)in - situ conservationCorrect answer is option 'A'. Can you explain this answer?
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