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NEET Questions / Botany / Plant Growth and Development / Vernalisation
A biennial plant requiring vernalisation is induced to flower after prolonged exposure to low temperatures. However, immediately after this cold treatment, if the plant is exposed to a brief period of high temperatures, the effect of vernalisation is nullified. This phenomenon is known as:
Devernalisation
Stratification
Photoperiodism
Vernalisation reversal
Which of the following statements about vernalisation is INCORRECT?
Vernalisation is the promotion of flowering by a period of low temperature.
The cold treatment is perceived by the shoot apical meristem.
Vernalisation always promotes flowering in all plant species.
The vernalisation stimulus can sometimes be transmitted through grafting.
The stable change in the plant brought about by vernalisation is believed to be:
Genetic
Physiological
Epigenetic
Morphological
Vernalisation is most effective when the cold treatment is applied to:
Mature, fully grown plants
Dry seeds
Germinating seeds or young seedlings
Flowers
Which part of the plant perceives the cold stimulus during vernalisation?
Leaves
Roots
Shoot apical meristem
Flowers
If a vernalised plant is grafted onto a non-vernalised plant, and the latter subsequently flowers, this suggests that:
Vernalisation is not necessary for flowering.
The grafting process itself induces flowering.
A transmissible floral stimulus is produced during vernalisation.
Low temperatures are transmitted through the graft.
Vernalisation is the promotion of flowering by:
Exposure to low temperature
Exposure to high temperature
Exposure to short photoperiods
Exposure to long photoperiods
The site of perception of low temperature stimulus during vernalisation is:
Root apex
Shoot apex
Leaves
Flowers
Vernalisation prevents precocious reproductive development late in the growing season, ensuring that the plant:
Flowers in the autumn
Flowers in the winter
Flowers in the spring
Remains vegetative
