plant hormones

Cards (10)

what does the hormone auxin do?
controls growth at the tips of shoots and roots
how does auxin work?
controls the growth in response to light - phototropism and gravity -geotropism
where is auxin produced?
in the tips and moves backwards to stimulate cell elongation
how does the shoot grow towards the light?
the side of the tip that is exposed to more light, more auxin accumulates
this makes the cells grow faster on the shaded side so the shoot bends towards the light
how to investigate plant growth responses?
put 10 cress seeds into three Petri dishes, each led moist filter paper
shine a light at one just above and the others from different directions
leave for a week and observe there responses
what are the uses for auxin?
killing weeds
growing cells from tissue culture (produces clones)
growing cuttings
what does gibberellin do?
stimulate seed germination, stem growth and flowering
what are the uses for gibberellin?
controlling dormancy
inducing flowering
growing larger fruit
what is ethene?
a gas that is produced by aging parts of a plant. it influences the growth of the plant by controlling cell division and stimulates enzymes that cause the fruit to ripen
what is ethene used for?
to speed up the ripening of plants or delay it