Unit 3 Lesson 4 Transpiration and Translocation Systems 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

How do Plants Absorb and Transport Materials? Step 1: Roots have tiny hairs covered with thin membranes that allow water and nutrients to enter. Osmosis is the movement of water from an area of higher water concentration to an area of lower water concentration. Water enters the roots until the concentration in the root is equal to the concentration outside the root. The water entering the root also carries substances (nutrients) 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

How do Plants Absorb and Transport Materials? Step 2: After absorption by the roots, water is passed from cell to cell until it reaches the xylem. Xylem is tissue, formed as tubes, that conducts water up the stems and to the leaves. The petiole of the leaf takes the water from the xylem in the stem of the leaf veins, which distribute it throughout the leaf. ***Remember…xylem move nutrients UP! 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

How do Plants Absorb and Transport Materials? Step 3: Leaves loose water by transpiration. Transpiration occurs through tiny stomata (microscopic pores on the underside of leaves. Transpiration creates somewhat of an upward pull that assists the xylem in moving water and nutrients. ***Remember, translocation is the movement of sugars from the leaves through the phloem. 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

How do Plants Absorb and Transport Materials? Step 4: Manufactured food (created by plant) is sent back out from the leaves, through the stems, and down to the roots in the phloem tissue. Phloem is the tissue, or plant tubing, that allows sugars, proteins, hormones, dissolved materials, and salts to move from the leaves to the other parts of the plant. Phloem are composed of sieve cells, which when hooked end to end, create a tube for transport. ***Remember, phloem carries sugar products back down 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

Unit 3, Lesson 4, Transpiration and Translocation Stomata 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation

Xylem and Phloem in a plant stem Xylem on inside Phloem on outside 11/14/2018 Unit 3, Lesson 4, Transpiration and Translocation