PLANT RESPONSES Flashcards
toxic chemicals released by plants
alkaloids- bitter tasting, bad smell, poisonous
tannins- bitter taste and can bind to proteins in the gut making the plant hard to digest
what are pheromones
alarm pheromones- causes nearby plants to detect these chemicals and start producing chemical defences
corn plants release pheromones when being eaten by caterpillars which attracts parasitic wasps
what do carrots produce at low temps?
antifreeze proteins which bind to ice crystals and lower temperature that water freezes at
what is a tropism
the response of a plant to a directional stimulus
phototropism
plants response to light
geotropism
growth of plant in response to gravity
hydrotropism
plant growth in response to water
thermotropism
plant growth in response to temperature
thigmotropism
plant growth in response to contact with an object
gibberellin
stimulates seed germination
stem elongation
side shoot formation
flowering
auxins
growth of shoots by cell elongation
what stimulates cell elongation
IAA
how does IAA move around the plant
short distance- diffusion and active transport
long distance- phloem
where does IAA move in phototropism and geotropism
phototropism- moves to shaded part of shoots and roots
geotropism- moves to underside of the shoots and roots
apical bud
shoot tip of flowering plant