Nicotiana tabacum,a short-day plant,when exposed to more than the critical period of light,fails to flower. Explain.

(N/A) Photoperiodism is the physiological response of plants to the relative lengths of light and dark periods.
$Nicotiana$ $tabacum$ is classified as a short-day plant $(SDP)$.
Short-day plants require a light period shorter than a certain critical duration to induce flowering.
If these plants are exposed to a light period longer than their critical day length,the flowering process is inhibited.
This occurs because the plant requires a specific duration of uninterrupted darkness to synthesize the flowering hormone,often referred to as florigen.
Exposure to light beyond the critical limit disrupts this dark-period requirement,thereby preventing the transition from vegetative growth to reproductive flowering.