Question

Refer the given figures on photoperiodism and select the correct option.

• A. A - No correlation between light period and flowering, B- Long light-exposure period, C- Short light-exposure period.
  
• B. A - Long light-exposure period, B- No correlation between light period and flowering, C- Short light exposure period.
• C. A - Short light exposure period, B- Long light-exposure period, C- No correlation between light period and flowering.
• D. A - No correlation between light period and flowering, B - Short light exposure period, C - Long light-exposure period.
  

Answer 1

The correct option is C A - Short light exposure period, B- Long light-exposure period, C- No correlation between light period and flowering.

A is a short day plant which requires longer duration of darkness and has less critical photoperiod. They flower when the night lengths exceed their critical photoperiod. For example, cotton.

B is a long day plant which requires shorter duration of darkness and has longer critical photoperiod. They flower when the night length falls below their critical photoperiod. For example, pea.

C is known as day neutral plant which do not depend on the length of the photoperiod. They flower regardless of photoperiod. For example rice.