Floral Meristem Determinacy

Question 1

What is a meristem?

Answer 1

Collect of undifferentiated cells found in most plant organs

Question 2

What is determinate architecture?

Answer 2

SAM converts directly to floral meristem and flowering is terminal

Question 3

What is indeterminate architecture?

Answer 3

SAM forms an inflorescence meristem which forms floral meristem on its flanks. Inflorescence meristem can go on to make other organs

Question 4

what is the difference between simple and compound indeterminacy?

Answer 4

In simple determinacy, floral meristems form directly from IM in a similar flanking style to leaves.
Compound determinacy means flowers grow on branches off of the primary stem

Question 5

what is a cymes?

Answer 5

A cluster of flowers where SAM terminates, but allows a lateral axis to form

Question 6

What is the phenotype of tfl1- mutant?

Answer 6

converts an indeterminate

Question 7

Where are the different transcription factors expressed before the transition to flowering?

Answer 7

TFL1 is expressed in the centre of SAM and in the nodes between the leaf and meristem
LFY is mostly expressed in the young leaves and AP1 is not expressed

Question 8

Where are the transcription factors expressed after floral transition?

Answer 8

TFL1 is strongly expressed in the inflorescence meristem and not in the flanking floral meristems
LFY and AP1 mimic each other and are expressed strongly in the floral meristem and flanks of IM

Question 9

What type of protein is TFL1?

Answer 9

PEBP protein

Question 10

What other PEBP protein was discovered to be part of the regulatory network?

Answer 10

FT protein
was thought to reciprocally inhibit w TFL1
Found it was not direct inhibition