Explain the methods of breaking seed dormancy
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There are two methods to break thedormancy of chilling requiring seeds: (a) Stratification: The dormancy of chilling required seed is broken by stratification. Low temperature requirement given to the seeds to break their dormancy is called stratification.
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Methods to break seed dormancy are:
- Scarification: It is softening of seed coat using sand paper or knives or chemicals like alcohol or acid.
- Stratification: It involves layering of seeds in specific medium and then exposing them to warm stratification at 15°C to 20°C which is followed by cold stratification at 0°C to 10°C.
- Removal of germination inhibitors: This includes washing the seeds thoroughly. Hormonal treatment: Hormones such as gibberellins or auxins can be used.
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