Which of the following factors influence the process of flowering?

Write a short note on vernalisation.

Some varieties of wheat are known as spring wheat while others are called winter wheat. The former variety is sown and planted in spring and is harvested by the end of the same season. However,winter varieties,if planted in spring,fail to flower or produce mature grains within a span of a flowering season. Explain,why?

Photoperiodism was first observed in

In $SDP$ (Short Day Plants),flowering does not occur when:

Florigen results in the conversion of