Plant Hormones Flashcards
Who isolated ethylene
Gane
Who isolated auxin
Hagen smit
Who isolated gibberelin
McMillan and sutter
Who isolated cytokinin
Leatham
Who isolated abscisic acid
Cornforth
3 types of cell surface hormone receptors
Ion channel linked, G protein linked, and enzyme linked
auxin(s) contain _________ structures and are derived from the amino acid ________ from the __________ via the ________ pathway
heterocylic structures, tryptophan, pentose phosphate pathway, Shikimic acid
cytokinin(s) contain _______ structures but is derived from combination ______ byproducts (adenosine mono-phosphate; AMP) and _____ from terpenoid synthesis
heterocyclic, pentose phosphate pathway, DMAPP
gibberellins and abscisic acid are both _______ derivatives
terpenoid
ethylene begins as ____
methionine
Gibberellin (gibberellic acid - GA) is not a _____ hormone, but a _____ of hormones
Single, class
which hormones causes a disease on rice that makes the plants grow very tall called “foolish seedling disease”
Giberellin
As GA is important for the early life history of plants it is responsible for:
seed germination
stem/root growth
plant sexual maturation (juvenile to adult) including derivation of gametophytic tissue (gametes include pollen and eggs)
Following sexual maturation GAs are responsible for:
pollen tube growth which occurs during fertilization fruit growth (parthenocarpy)
GA is key for seedling emergence from it’s _____
dormant state
Imbibition
Germination begins as water is able to penetrate the seed coat
DELLA proteins are ________!
transcriptional inhibitors
In the aleurone cells:
a secondary signal from the binding of GA with the receptor enters the nucleus and binds with ______ proteins which interact with DNA
Della
Auxin usually is located on
The tips of the plants
Auxin is associated with
Tryptophan synthesis
Auxin transport is
Basipedal (from tip to root)
Auxin needs to bind to _____ therefore making it stay in _____ form as it is transported
Other compounds such as sugars, inactive
Auxin is moved through
Diffusion
cytokinin is primarily synthesized in the ______ zone, then are transported through the plant in the _______ (acropetal)
can also be transported basipetally via _____ as well…
in the root localized effect is to:
increase cell division and differentiation (root growth)
to produce lateral roots
in the stem, promotes lateral bud development
root differentiation zone, root xylem, root differentiation zone,
