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Plant Tropisms

Plant Tropisms. 4 th Grade- Chelsea Caraway. Tropism. Tropism- when a plant grows or moves toward an environmental stimulus. Phototropism. Phototropism- when stems and leaves grow toward the light source. Flowers and leaves grow toward the Sun because of phototropism. Phototropism.

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Plant Tropisms

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  1. Plant Tropisms 4th Grade- Chelsea Caraway

  2. Tropism • Tropism- when a plant grows or moves toward an environmental stimulus

  3. Phototropism • Phototropism- when stems and leaves grow toward the light source

  4. Flowers and leaves grow toward the Sun because of phototropism.

  5. Phototropism

  6. Gravitropism • Gravitropism can also be called geotropism. • It is when stems grow upward and roots grow downward.

  7. Gravitropism • Roots show positivegravitropism because they grow in the same direction as the gravitational pull. • Stems show negativegravitropism because they grow in the opposite direction as the gravitational pull.

  8. Gravitropism

  9. Gravitropism

  10. Hydrotropism • Hydrotropism- when roots grow toward a water source

  11. Hydrotropism

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