Winter varieties of wheat and barley are planted in

Florigen results in the conversion of

Vernalization stimulates flowering in

During vernalisation,the stimulus of low temperature is perceived by

The hormonal substance which migrates from leaves to shoot apices to induce flowering is

$A$ group of plants shows flowering in a $12$ hour day and $12$ hour night cycle. When the night phase of another group of the same plants is interrupted by a brief flash of light, flowering does not occur. In which of the following groups would you place these plants?