Question

Which of the following is required for

stimulation of flowering in the plants?

a. Adequate oxygen

b. Definite photoperiod

c. Adequate water

d. Water and minerals ​

Answer 1

Answer:

b. definite photoperiod

Explanation:

• The length of light period is called photoperiod and the response shown by the plants to changes in relative lengths of dark and light period is called photoperiodism. And plants exhibiting such response are known as photoperiodic plants.
• Most plants can flower only if they were exposed to light less or more than a certain period which is known as critical period.
• Accordingly, plants can be categorised as follows:

1. Long day plants: these plants flower when they receive long photoperiods or light hours which are above then a critical period.

    eg: wheat, radish, sugarbeet, henbane etc.

    2. Short day plants: these plants flower when they are exposed to a    photoperiod shorter than a critical period. Most of the winter flowering plants belong to this category.

eg: soyabean, tobacco etc.

    3. Day neutral plants: these plants do not show any correlation between exposure to light duration and induction of flowering response. they blossom throughout the year.

eg: tomato, pepper, cucumber etc.

Answer 2

Answer:

B. Definite photo period