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Unit 3 Lesson 5 Plant Hormones and Their Effects

Unit 3 Lesson 5 Plant Hormones and Their Effects. Functions of Plant Hormones. Plant hormones are chemicals that are produced in one part of the plant and transported to another part, where it causes a physiological change. . Types of Plant Hormones.

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Unit 3 Lesson 5 Plant Hormones and Their Effects

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  1. Unit 3Lesson 5Plant Hormones and Their Effects Unit 3, Lesson 5, Plant Hormones and Their Effects

  2. Functions of Plant Hormones • Plant hormones are chemicals that are produced in one part of the plant and transported to another part, where it causes a physiological change. Unit 3, Lesson 5, Plant Hormones and Their Effects

  3. Types of Plant Hormones • There are four common types of plant hormones: • Auxins • Gibberellins • Cytokinins • Ethylene Unit 3, Lesson 5, Plant Hormones and Their Effects

  4. Description of Auxins With Auxins • Auxins promote cell elongation. • It weakens the connections between the cellulose fibers in the cell wall, which allow them to stretch and grow longer. • Auxins promote stem growth Without Auxins Unit 3, Lesson 5, Plant Hormones and Their Effects

  5. Description of Gibberellins • Gibberellins also promote cell elongation. • Dwarf plants are often “dwarfed” because they cannot produce gibberellins or can’t process it. • Fruit farmers use it to enhance fruit formation. Unit 3, Lesson 5, Plant Hormones and Their Effects

  6. Description of Cytokinins • Cytokinins stimulate cell division (cytokinesis). • They produce more proteins by promoting mitosis. • Cytokinins are produced in the roots. Unit 3, Lesson 5, Plant Hormones and Their Effects

  7. Description of Ethylene Gas • Ethylene is a simple, gaseous compound composed of carbon and hydrogen that speeds the ripening of fruit. • Ethylene causes the cell walls to become soft and causes the fruit to become sweet. Unit 3, Lesson 5, Plant Hormones and Their Effects

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