Plant Movement Flashcards
Plant Movement
What are the 3 types of movements
Growth movements
Turgor movements
Taxic movements
Plant Movement
Growth movements are stimulated ___ and ___
Internally and externally
Plant Movement
What are the 4 internally stimulated growth movements
Nutations
Nodding movements
Contraction movements
Nastic movements
Plant Movement
Nutations =
Stems spiral as they grow
Plant Movement
Nodding movements =
Hypocotyl of bean plants nod left and reft to help it break through the soil
Plant Movement
Contraction movements =
Contractile roots pull bulb or corm into soil
Plant Movement
Nastic movements =
Leaves, petals, sepals flap as layers grow at different rates
Plant Movement
Externally stimulated movement is also known as ___ and occur in __ phases
Tropisms
3 Phases
Plant Movement
What are the 3 phases of tropisms
Perception phase
Transduction phase
Asymmetric growth
Plant Movement
Perception phase =
Plant contacts stimulus asymmetrically
Plant Movement
Transduction phase =
Growth hormones become unevenly distributed
Plant Movement
Asymmetric growth =
Cells on one side extend/grow faster
Plant Movement
Positive tropism =
Negative tropism =
Positive = towards stimulus
Negative = away from stimulus
Plant Movement
What are the 3 tropisms
Phototropism
Gravitropism
Thigmotropism
Plant Movement
Phototropism =
Grows towards light, auxins moves away from light
Plant Movement
Gravitropism =
Growth relative to gravity, starch grains in roots
Plant Movement
Thigmotropism =
Growth relative to contact
Contact decreases growth
Plant Movement
Turgor movements are movements relative to
___ are responsible
Gain and loss of water
Pulvini structures
Plant Movement
Contact with pulvini structures encourages
Water follows
Potassium ions to be released, and ions diffuse
from one parenchyma cell to another
Plant Movement
Turgor movements are closely associated with (3)
Circadian rhythm
Solar tracking
Water retention
Plant Movement
Circadian rhythm =
Turgor movements help with (2)
Timing of life’s events
Opening / closing of leaves at day / night
Opening of flowers
Plant Movement
Solar tracking and Turgor movements
Pulvini cells control
Positions of head and leaves of sunflowers
Plant Movement
Water conversation and turgor movements
Bulliform cells…
Deflate to close leaf
Plant Movement
Taxic movement is
The use of cilia or flagella for movement
Plant Movement
Phototaxis =
Chemotaxis =
Movement relative to light
Movement relative to chemical
