Photoperiodism

In photoperiodism, the site of perception of light/dark duration is -

Photoperiodism affects which of the following processes?

Photoperiod affects reproduction in seasonal breeders of:

Write a short note on photoperiodism.

Write a short note on photoperiodism.

What is phytochrome? What is the significance of it?

Phytochrome was discovered by

Which of the following plant hormone has not yet been isolated

The phenomenon of photoperiodism in plants was discovered by

Given figure shows the effect of interruption of skotoperiod (dark period) in a short day plant by light of different types.

Select the correct option for (i), (ii) and (iii).

Photoperiod stimulus is perceived by______ pigment.

Phenomenon of photoperiodism was first discovered by_________ in the "Maryland mammoth" variety of _______.

Sedum is a long day plant. Its critical duration of light is 13 hours. Under which of the following conditions would it flower?

Four potted plants ($\mathrm{I}, \mathrm{II}, \mathrm{III} \mathrm{and} \mathrm{IV}$) of a short day plant, which has the critical period of 14 hours; are taken and exposed to light for different time periods. The light periods given are listed in the table.

Which potted plant will show flowering after exposure to light?

Maryland mammoth tobacco is a short-day plant. Its critical duration of darkness is 10 hours. Under which of the following conditions will it not flower?

Phytochrome is a

When a dark period of short day plant is interrupted by a brief exposure to light, the plant:

The effect of day length on the development of plant is called:

The response of a plant to seasonal changes in day length is known as?

Which of the following fails to flower when day length exceeds the critical length?