essay Flashcards
how much does zygote elongate by and what is first division
threefold7
asym
apical cell division
isotropic growth pattern
x2 anticlinal
x1 periclinal
basal cell expansion and division
longitudinal
periclinal
what do the cells of the basal linneage which become embryo give rise to
quiescent centre and the columella stem cells of root meristem
what do mut in YDA show
importance of zygote elongation
when doesnt occur no dev of suspensor cells
wox expression at 16 cell apical
wox2 in upper tier
wox 9 in lower
wox2 mut embryo
abnormal anticlinal division in 4th div of prospective root domain = 1 cotyledon not 2
dbl mut wox8/9
abnormal div in embryo and suspensor
1st div apical cell periclinal
irregular cell division planes/enlarged in basal lineage.
show exert non autonomous effect on apical lineage
what is first element of radial pattern specifed
epidermis primordium
epidermis primordium inv patterning of
at meristem layer 1
where is ATM1 expressed and what is its mut ptype
in epidermis primordium of developing embryo and l1 at shoot apex
no epidermis and no epidermis in early embryogenesis - show their role in epidermis differentiation prog.
what gene give meristem identity
cup shaped cotyledon and shootmeristem less.
expression and role of stm and cuc
cuc3 in upper region of embryo 8-globular
late globular constricted to stripe covering medial domain, probs due to increased auxin flow.
cuc3 promote stm expr in incipient shoot meristem
stm negatively reg cuc3 = late heart stage expression of cuc only in narrow circle sperating incipient shoot apical meristem from cotyledon primordia.
where auxin flow in 1 cell embryo
basal to apical
effecct of block pin
impair embryonic dev / defent in a-b patterning
