Stomata Differentiation

Question 1

What steps in stomatal development are regulated by SPEECHLESS

Answer 1

Initiation of the the asymmetric division of the meristemoid mother cell to produce the meristemoid

Question 2

What steps in stomatal development are regulated MUTE?

Answer 2

Differentiation of the meristemoid to produce the guard mother cell

Question 3

What steps in stomatal development are regulated by FAMA?

Answer 3

Initiates the symmetric division of the guard mother cell to produce the guard cells

Question 4

What would a loss of function for SPEECHLESS look like?

Answer 4

Asymmetric division of meristemoid mother cell does not take place; no guard cells form

Question 5

What would a loss of function for MUTE look like?

Answer 5

Cells stay in meristemoid mother cell fate – more asymmetric divisions than WT – rosette pattern of cells surrounding a small, arrested meristemoid-like cell

Question 6

What would a loss of function for FAMA look like?

Answer 6

Guard mother cell divides symmetrically many times instead of just once, guard cells do not divide. Results in rows of cells in the epidermis

Question 7

What would a overexpression for FAMA look like?

Answer 7

All cells develop as single unpaired guard cells

Question 8

What would a overexpression for MUTE look like?

Answer 8

All epidermal cells develop as symmetrically paired guard cells

Question 9

What would a overexpression for SPEECHLESS look like?

Answer 9

Pavement cells divide excessively, many cells with meristemoid mother cell fate