Photoperiodism

Fill in the blank with the correct answer from the bracket.

_____ hormones are responsible for flowering. (Cytokinin, Florigen, ABA, Auxin)

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

Photoperiodism affects which of the following processes?

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 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?

Day-neutral plants

A scientist is doing the experiment on SDP to initiate flowering. Which experiment of light induction will initiate the flowering in SDP?

Photo-induced flowering was hypothesized to be because of

Read the following statements with respect to short-day plants, and state them as true (T) or false (F).

A. Most of winter flowering plants belong to this category.

B. They are long-night plants, as they need uninterrupted dark period.

C. They do not initiate flowering when photoperiod exceeds the critical photoperiod.

D. They initiate flowering when dark period is less than the critical dark period and light period is more.