(A) The low temperature required for vernalisation is usually $0^{\circ}C - 5^{\circ}C$. If this low temperature treatment is immediately followed by

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Application of high temperature

(A) The low temperature required for vernalisation is usually $0^{\circ}C - 5^{\circ}C$. If this low temperature treatment is immediately followed by a very high temperature (approximately $40^{\circ}C$),the effect of vernalisation is nullified or lost. This phenomenon of reversing the effect of vernalisation is known as devernalisation.