PLANT TROPISMS. PLANT TROPISMS TROPISM A Reaction in plants due to a stimulus What are some ways plants react?

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Presentation transcript:

PLANT TROPISMS

TROPISM A Reaction in plants due to a stimulus What are some ways plants react?

Positive Tropism vs Negative Tropism Positive = Towards tropism Negative = Away tropism Questions ask: Is the stem positive or negative towards light? Is stem positive or negative towards gravity? Is the roots positive or negative towards light? Is the roots positive or negative towards gravity?

PHOTOtropism LIGHT Movement of plant towards the _______________? The Hormone AUXIN helps it grow!

GEOtropism Movement of ROOTS towards the ground due to gravity.

HYDROtropism WATER Plants grow towards ___________________

THIGMOtropism TOUCH Plant movement towards _____________.

Positive phototropism Negative phototropism Leaves growing towards sunlight would be this type of tropism _____________________. Positive geotropism Negative geotropism Positive phototropism Negative phototropism

Positive thigmotropism Negative thigmotropism Positive Geotropism Grapevines wrapping themselves around a fence would be this type of tropism__________. Positive thigmotropism Negative thigmotropism Positive Geotropism Negative Geotropism

Positive Phototropism Negative Phototropism Growth of the leaves away from the center of Earth is called_____________? Positive Geotropism Negative Geotropism Positive Phototropism Negative Phototropism

Growth of the roots towards water is called: Geotropism Thigmotropism Phototropism Hydrotropism