|
Importance of day length in flowering of plants was first shown in |
|||||||
|
a) |
Lemna |
b) |
Tobacco |
c) |
Cotton |
d) |
Pentunia |
|
Importance of day length in flowering of plants was first shown in |
|||||||
|
a) |
Lemna |
b) |
Tobacco |
c) |
Cotton |
d) |
Pentunia |
|
(b) The phenomenon of photoperiodism was first discovered by Garner and Allard (1920-1922). They observed that maryland mammoth variety of tobacco could be made to flower only by reducing the light hours with artificial darkening. |