Question: Plants that flowers under the photoperiods, less than the critical day length are called
Options:
Short Day plants
Long Day plants
Day neutrals
Phototropic
→ Photoperiodism: Photoperiodism is a physiological reaction of organisms to the length of day or night, influencing flowering in plants. Plants can be classified as:
Short-day plants: Flower when exposed to a photoperiod equal to or shorter than their critical day length (e.g., rice, jowar, green gram, black gram).
Long-day plants: Flower when exposed to a photoperiod longer than their critical day length (e.g., wheat, barley).
Day-neutral plants: Do not require any specific light period for flowering (e.g., cotton, sunflower).
📝 Additional Information:
→ Plants that flower under photoperiods shorter than the critical day length are called Short-day plants.