However, the work of Gassner (1918) is usually cited as the first report that a wide range of plant species require cold exposure to flower (Chouard, 1960; Lang, 1965). There are several ways to classify the vernalization responsiveness of plants.

Who discovered vernalization?

The formal definition was given in 1960 by a French botanist P. Chouard, as "the acquisition or acceleration of the ability to flower by a chilling treatment". Lysenko's 1928 paper on vernalization and plant physiology drew wide attention due to its practical consequences for Russian agriculture.

Who proposed the hormonal theory of vernalization?

9. Hormonal theories • Melcher (1939) • He proposed that chlling treatment induces the formation of a new floral hormone called vernalin. This hormone is transmitted to other parts of the plant. He graphted a vernalized plant with an unvernalized plant.