Types of Tropism PHOTO... THIGMO... GRAVI... POINTS.....!!!
100
The effect of gravity on plant growth
What is Gravitropism?
100
vertically
To which side will a potted plant grow in the open with sunlight, vertically or horizontally?
100
thigmotropism
If the stem of a runner bean plant coils around a pole this illustrates what?
100
Upward- against the gravity
Which way does the embryonic shoot grow to exhibit a negative gravitropism?
100
Gravity
What is Gravitropism in relation to?
200
Thigmotropism
What is a movement in response to touch?
200
negative phototropism
What is plant growth that curves away from the light?
200
touches
Ex. A flowering plant grows straight up and down until it _______ something, then cells in contact with an object such as a pole or and underground rock, grow less while those on the opposite side elongate.
200
Increased auxin concentration
What causes the cells in one area to grow more than cells on the upper side?
200
Light
What is phototropism in relation to?
300
Phototropism
What is a movement in response to a light stimulus?
300
insensitive to light
Roots, depending on the species examined, are negative phototropism or ...
300
By building shorter and sturdier plants.
How is cell elongation inhibited?
300
positive gravitropism
By growing with gravity downward into the soil the embryonic root exhibits what?
300
Touch
What is Thigmotropism in relation to?
400
Chemotropism (Chemicals), Traumotropism (trauma), Skototropism (darkness), and aerotropism (oxygen).
What kind of other tropisms are included?
400
Stem- this shows positive phototropism
Which part of a plant is most likely to show phototropism?
400
one side of an organ elongates faster than the other, and the result is a curving toward or away from the stimulus.
What occurs to one side of an organ vs the other in tropism due to differential growth?
400
roots no longer respond to gravity
What happens according to Charles and Francis Darwin if the roots are capped?
400
one is related to the oxygen and the other is the actual gravity
What is the difference between aerotropism and gravitropism?
500
Growth toward or away from a unidirectional stimulus.
What is Tropism????????
500

Occurs because the cells on the shady side of the stem elongate due to the presence of auxin.
What is positive phototropism?
500
Thigmomorphogenesis
What is when a plant changes its overall shape due to an environmental touch stimulus called?
500
signals from statoliths ( light) will change and redistribute causing roots to bend down and shoot to grow up.
What happens if you place a potted plant on its side?
500
Darkness
What is Skototropism?






Tropism

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