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what do plants need to respond to?
abiotic stress and attention of herbivores
what are tropisms?
directional growth in response to environmental stimulus
what is phototropism?
growth of plant in response to light
what is geotropism?
growth of plant in response to gravity
what is hydrotropism?
plant growth in response to water
what is thigmotropism?
plant growth in response to contact with an object
what is thermotropism?
plant growth in response to temperature
what is chemotropism?
growth of plant in response to chemicals
shoots have what phototropism?
positive
roots have what phototropism?
negative
shoots have what geotropism?
negative
roots have what geotropism?
positive
define antagonistic?
hormones working against eachother
define synergistic
hormones working together to promote the same response
where are plant growth hormones produced?
roots and shoots tips
what is gibberellin?
growth hormone
what are auxins?
growth hormones
what happens if a seed does not have gibberellin?
it will not germinate
when a seed absorbs water what is activated and what is produced?
embryo is activated and begins to produce gibberellin
