In respect of photomorphogenesis,plants are most sensitive to:

Which of the following is a short-day plant?

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?

What happens if winter-growing plant species are sown in the spring season?

Assertion: Dark period plays a more important part in flowering than the light period.
Reason: Flowering occurs in short-day plants if the dark period is interrupted by a light break.

In short day plants $(SDP)$,flowering is induced by