Which of the following movement is not related to auxin level?
Bending of shoot towards light
Movement of root towards soil
Nyctinastic leaf movements
Movement of sunflower head tracking the sun
Geocarpic fruits are produced by
onion
watermelon
groundnut
carrot
How does pruning help in making the hedge dense?
It frees axillary buds from apical dominance
the apical shoot grows faster after pruning
It releases wound hormones
It reduces the differeniation of new shoots from the rootstock.
Pytochrome is involved in
phototropism
photorespiration
photoperiodism
geotropism
Gibberellins promote
seed germination
seed dormancy
leaf fall
root elongation
In short-day plants, flowering is induced by
photoperiod less than 12 hr
photoperiod below a critical length and uninterrupted long night
long night
short photoperiod and interrupted long night
Differentiation of shoot is controlled by
high gibberellin---cytokinin ratio
high auxin---cytokinin ratio
high cytokinin---auxin ratio
high gibberellin ----auxin ratio
Cytokinins
promote abscission
influence water movement
help retain chlorophyll
inhibit protoplasmic streaming
One set of a plant was grown at 12 hr day and 12 hr night period cycles and it flowered while in the other set night phase was interruped by flash of light and it did not produce flower. Under which one of the following categories will you place this plant?
Long-day
Darkness neutral
Day neutral
Short-day
A chemical believed to be involved in flowering is
gibberellin
kinetin
florigen
IBA
