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16 Cards in this Set

  • Front
  • Back
Auxin controls what?
Regulation of elongation growth in young stems and coleoptiles. also, stimulation of adventitous root formation
where is auxin mainly located in the cell?
the cytosol and the chloroplasts
where is auxin synthesized?
primarily in the apical bud and is transported polarly to the root
the vast majority of auxin is found in what state?
bound to other molecules
what do giberellins do?
induce dramatic internode elongation in certain types of plants and grasses, regulate fruit growth, and play a role in germination
where are giberellins produced?
in roots, young leaves and seeds
how does it promote stem growth?
by promoting cell elongation and division
what else does it promote?
the production of amylase
what is ABA?
abscisic acid, which is an inhibitory hormone
what does ABA do?
causes stomata to close, and promotes bud and seed dormancy
why do plants produce ethylene?
in response to stresses and barriers in the soil, occurs in fruit ripening and programmed cell death, in response to high outer conc of auxin
what are the three parts of the triple response?
slowing of stem elongation, thickening of the stem, curving to grow horizontally
blue light is effective in what?
phototropism, slowing of hypocotyl elongation when a seedling germinates, and light-induced opening of stomata
what are the blue light receptors?
cryptochromes, phototropin and zeaxanthain
what does red light do?
stimulate seed germination, slow hypocotyl elongation, stimulate cotyledon expansion, and flowering time regulation
what detects red light?