ss Flashcards
what is floral induction
vegetative meri-inflorescent
how was signal found
grafting experiments of plant expose to diff day setting
where does signal for floral induction come from
leaves to shoot apex
what is florigen
hypothesis of chemical that causes floral induction
what is FT
the florigen signal flowering locus T (FT)
mut/over expr ft
delay flowering
precocious flowering
what is constans and where expr
is a FT activator
specifically expr in phloem
high level constans cause
high levels of FT in vasculature sufficent enough to trigger early flowering
special aout constans
output of circadian clock and has diurnal expression pattern peaks 16 hrs after dawn
why constans circadian
degrade in dark
why in short days plants do not grow as not enough accumulation of CO
how does CO activate FT expression
binds to promoter
what does FT bind to
TF FD
where is FD expr
in shoot apex in spatial domain where floral meristem identity genes are upreg
role of FD
FT translocate from leaves to apex activate FD TF enabling activation of floral meristem identity genes such as AP1 to convert to floral fate
what is FT closely rel to
Terminal flower 1
a floral repressor
