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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

florigen is self-propagating given a induced shoot can stimulate flowering in --

repeated grafts