Importance of day length in flowering of plants was first shown in

Importance of day length in flowering was first shown in

Importance of day length ( photoperiodism ) in flowering of plants was first shown in

Importance of day length ( photoperiodism ) in flowering of plants was first shown in

Importance of day length (photoperiodism) in flowering of plants was first shown in (a) Cotton (b) Petunia (c) Lemna (d) Tobacco

Impotance of day length ( photoperiodism ) in flowering of plants was first shown in

In short day plants flowering

The first flowering plants appeared in

Short day plants flower in

What is important for the flowering in short day plants if it is the time of long nights?