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Treatment of seed at low temperature under moist conditions to break its dormancy is called -
A
Scarification
B
Vernalization
C
Chelation
D
Stratification
Detailed Solution
The seeds of many temperate plants, such as apple, peach and cherry, do not germinate until they have been exposed to a period of chilling.
Stratification is the treatment in which seeds are kept at a low temperature (about 0 to $10^\circ C$) under moist conditions for some weeks.
During this treatment the level of inhibitors such as abscisic acid falls and that of gibberellins rises, so dormancy is broken.
Scarification is the weakening or breaking of a hard seed coat by mechanical or chemical means.
Vernalisation is a low temperature treatment that promotes flowering, not the breaking of seed dormancy.
Chelation is the binding of metal ions by organic molecules.
So the treatment is called stratification.
Stratification is the treatment in which seeds are kept at a low temperature (about 0 to $10^\circ C$) under moist conditions for some weeks.
During this treatment the level of inhibitors such as abscisic acid falls and that of gibberellins rises, so dormancy is broken.
Scarification is the weakening or breaking of a hard seed coat by mechanical or chemical means.
Vernalisation is a low temperature treatment that promotes flowering, not the breaking of seed dormancy.
Chelation is the binding of metal ions by organic molecules.
So the treatment is called stratification.