Plant Physiology Flashcards
Mimosa pudica
Touch me not plant
Helianthus annus
Sunflower
. unidirectional movement of a whole or part of a plant towards the direction of stimuli
Tropism
How many types of tropism
5
Phototropism geotropism hydrotropism thigmotropism chemotropism
Movement of plant part towards light
Phototropism
Eg shoot of the plant
Moment of plant in response to gravity
Geotropism
Eg root
Movement of plant or part of a plant toward water
Hydrotropism
Eg root
Movement of a plant part due to touch
Thigmotropism
Eg climbing vines
Movement of your part of plant in response to chemical
Chemotropism
example growth of your Pollen tube in response to sugar present on the Stigma
Some halophytes produce negatively geotropic roots
Rhizophora
This roots turn 180 degree upright for respiration
Movement are non directional response of a plant or part of a plant to Stimulus
Nastic
Movement of a part of a plant in response to light
Photonasty
Eg of photo nasty
Taraxacum officinale - blooms in morning and closes in the evening
Ipomea alba (moon flower)-open in night and closes during day
Movement of part of plant in response to touch
Sesimonasty (thigmonasty)
Eg mimosa pudica
Venus flytrap
Dionaea muscipula