The area of photoperception in plants is

Subjecting the growing of which plant to a cold treatment stimulates subsequent photoperiodic flowering response?

Photoperiodism affects

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?

Some plants like sugarbeet and cabbage require low temperature for flowering. This phenomenon is called:

Nicotiana tabacum,a short-day plant,when exposed to more than the critical period of light,fails to flower. Explain.