Flashcards in Control of Flowering Deck (33):
1
Name the types of genes responsible for regulating floral organ identity.
meristem identity genes
floral organ identity genes
cadastral genes
2
encode transcription factors that are necessary for the initial induction of organ identity
meristem identity genes
3
meristem identity genes must be active for -- at the shoot to become a floral meristem
immature primordia
4
meristem identity genes must be active for -- at apical meristem to become a floral meristem
inflorescence
5
encode transcription factors that directly control floral identity
floral organ identity genes
6
floral organ identity genes are -- that act as major developmental switches that activate the genetic program for a particular structure
Homeotic genes
7
encode transcription factors that act as spatial regulators of the floral organ identity genes by setting boundaries for their expression
cadastral genes
8
Ability of an organism to detect day length, to allow an event to occur at a particular time of year
photoperiodism
9
Treatment of a -- of a SDP with short photoperiod is enough to trigger flowering in that plant
single leaf
10
Process whereby flowering is promoted by a cold treatment given to a fully hydrated seed or to a growing plant
vernalization
11
Transmissible floral stimulus that is self-propagating
florigen
12
site of perception of the photoperiodic signal
leaf
13
Giving a plant a short flash of light (i.e. a “night break) during a long night cancels the effect of the long-night and disrupts flowering in --
SDPs
14
Giving a plant a short flash of light (i.e. a “night break) during a long night cancels the effect of the long-night and triggers flowering in --
LDPs
15
controls 1st and 2nd whorls
A
16
controls 2nd and 3rd whorls
B
17
controls 3rd and 4th whorls
C
18
loss of A
carpels instead of sepals in 1st whorl and stamens instead of petals in 2nd whorl
19
loss of B
sepals instead of petals in 2nd whorl and carpels instead of stamens in 3rd whorl
20
loss of C
petals instead of stamens in 3rd whorl and new flower instead of carpels in 4th whorl
21
loss of A, B, C
pseudoflower
22
Knocking out class E genes →
leaves in all whorls
23
-- produces petals in all whorls
ectopic expression
24
day length exceeds a critical day length --> flowering in
LDPs
25
day length is less than a critical day length
--> flowering in
SDPs
26
plants differ considerably in the -- at which they become sensitive to vernalization
age
27
winter annuals respond to low temp -- in life cycle
early
28
effective temp range for vernalization is from just below freezing to --
10 degrees C
29
verbalization takes place in
shoot apical meristem
30
vernalization linked to
photoperiod requirement
31
vernalization involves -- in gene expression
epigenetic changes
32
epigenetic changes in gene expression that can be passed on through -- w/o change in DNA sequence
mitosis
33