In SDP flowering does not occur

Options

A. When intermediate light is given red `rarr` far red `rarr` red
B. Interrupted by a flash of far light
C. Interrupted by a flash red `rarr` far light
D. All of these

Answer

A

Explanation

In short day plant, the dark period is critical and must continue. If this dark period is interrupted with a brief exposure of red light (660-665 nm wavelengths) the short day plant will not flower. However, the inhibitory effect of red light can be overcome by a subsequent exposure with far-red.