Notes

• Flowering at same time for cross pollination.

• Long day plants (flower when night is short)

• Short day plants (flower when might is long)

• Day Neutral plants have no light trigger.

• If they reduced the timing by 1 hour they got flowering.

• Can you tell from this if it’s the light or dark controlling the flowering?

• No, not really

Notes

• The flowering in plants is dependant on the length of the dark exposure.

• The timing mechanism is phytochrome pigment – 2 types. Pfr (far red) Pr (red)

Notes

• Sunlight = more red light.

• = more Pfr produced.

• Darkness = Pfr slowly changes to Pr

• = Some Pr remains.