10 Flashcards
(21 cards)
3 stages of post embryonic plant development.
- juvenile phase
- adult vegetative phase
- adult reproductive phase
transition from one post embryonic phase to another is called
phase change
-
-leaf shape
- rooting ability
miR156 inhibits miR 173 at the _____ phase
juvenile
as plants mature miR156 expression is ______ and causes
- activation of _______
- competence to flower
reduced, miR172
competence to flower
the readiness of a plant to flower with the right environmental cues
key factors triggering flowering
- temperature
- photoperiod
photoperiodism
any response by an organism that is based on photoperiod
Long day plants
bloom late spring and early summer when days are longer than a certain length
short day plants bloom in:
the spring or fall when days are shorter than a certain length
day neutral plants flower:
regardless of the photoperiod
_______ is responsible for triggering flowering response
phtochrome
flower inducing signal transmitted from leaves to meristem is called
florigen
in arabidoosis the defective gene used to identify florigen is called
flowering lotus t (FT)
what trigger expression of flowering lotus T protein in leaf phloem companion cells?
ideal day length and temperature
FT is transported via phloem to shoot meristems where it induces a switch from leaf to flower formation
floral meristem
is a modified shoot apical meristem that produces flowers
a flower contains four organd
sepals, petal, stamen, carpel
homeotic mutants
one floral organ is replaced by another
THE ABC MODEL OF FLOWERING
- A protein forms:
-A+ B forms
-B+C forms
-C forms
sepal
petal
stamens
carpels
A protein inhibits production of __ protein
C
