Which one is a short-day plant?

Short night plants are known as:

Assertion: Photomodulation of flowering is a phytochrome regulated process.
Reason: Active form of phytochrome $(P_{FR})$ directly induces floral induction in shoot buds.

Which light is most effective in inducing seed germination?

At which wavelength is light absorbed by the phytochrome in the $P_r$ form (in $, nm$)?

Photoperiodism was first studied by