lesson 7 plant organ systems, water & nutrients movement

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Lesson 7 Plant organ systems, water & nutrients movement

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Page 1: Lesson 7 Plant organ systems, water & nutrients movement

Lesson 7Plant organ systems, water &

nutrients movement

Page 2: Lesson 7 Plant organ systems, water & nutrients movement

A- Plant organ systemsA1. Root system

A2. - Usually underground

A3. Shoot system

A4. -usually above ground

Page 3: Lesson 7 Plant organ systems, water & nutrients movement

B- Shoot and Root systems working together

B1-To move nutrients, water and hormones throughout plants via vascular bundles (xylem + phloem)

Page 4: Lesson 7 Plant organ systems, water & nutrients movement

C-Marcello Malpighi’s experiment (1686)C1.Question raised: what

happen if the flow of materials in the vascular bundles was interrupted?

C2.Describe what happen in the picture

C3. Removing phloem led to swelling of tree bark above the cut.

C4. Sweet fluid dripped out of the swelling

C5.Tree died a few weeks after the experimentC6. What do you think happened?

Page 5: Lesson 7 Plant organ systems, water & nutrients movement

D-Movement of materials in vascular bundles

D1.Phloem moves sugars from where to where?

D2.From leaves to other organs

D3.Xylem moves water and minerals from where to where?

D4.From roots to other organs

D5.What would the results have been if the xylem is removed?

D6.Water from root can’t reach leaves, no photosynthesis take place. Plant will also die out

Page 6: Lesson 7 Plant organ systems, water & nutrients movement

E. What happen to plant when no or too much water?

E1.No water:

E2.Nutrients in soils can’t be dissolved and taken up

E3.No water for photosynthesis

E4.Plants will die

Too much water:

E5. Root cells die as not enough O2 in soil to get energy from cellular respiration

Page 7: Lesson 7 Plant organ systems, water & nutrients movement

F- Photosynthesis coupled with cellular respiration to give organisms energy

F1.Animals don’t have chloroplasts; thus, they have to obtain energy from the environment

How is the reaction of phososynthesis compared to cellular respiration?

Page 8: Lesson 7 Plant organ systems, water & nutrients movement

G-How is water moved through xylem?G1.Water transported up the

plant against gravityG2.Water first absorbed by

the root hairsG3.Water and nutrients then

enter the root by osmosis until it they reach the xylem

G4. osmosis= the movement of water from a place of higher WATER concentration to a place of lower WATER concentration

F5.Before entering xylem, water and nutrients are forced through the waxy cell membranes of the endodermis.

Page 9: Lesson 7 Plant organ systems, water & nutrients movement

G-How is water moved through xylem?(cont.)

G5. A combination of root pressure, loss of water through stomata (leaf openings) and adhesion and cohesion properties of water helps move water up the plants.

G6.Adhesion: ability of water molecules to stick to certain surface (e.g. xylem’s wall)

G7.Cohesion: ability of water molecules to stick to one another

Page 10: Lesson 7 Plant organ systems, water & nutrients movement

H-How is sugar moved through plant?H1.Glucose from leaves must first

converted into sucrose

H2.Sucrose is soluble in water and is transported through plants via phloem

H3.When reaching root, sucrose is converted into starch

H4. If plants need starch from root, starch must be converted back to sucrose because starch is water insoluble

H5.Starch is then transported upward as sap

Collecting maple sap

Page 11: Lesson 7 Plant organ systems, water & nutrients movement

I-How do shoot and root systems depend on one another?

I1.What is produced in the leaves that needed by the rest of the plants?

I2.Explain how without the shoot systems the products produced by leaves will be of limited use for plant survival?

I3. Explain how photosynthesis is not possible without the shoot system?

Page 12: Lesson 7 Plant organ systems, water & nutrients movement

L- Review questions

• Do question 10, 11, 13, 14, 16, 17, 18, 20, 26, 27, 28, 29, 30 Page 80-81