Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have...

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Vascular Plant Transport

Transcript of Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have...

Page 1: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Vascular Plant Transport

Page 2: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Plant Transport

Root need sugarLeaf make sugarLeaf need waterRoot have water

Water go upSugar go down

Root and Leaf shareRoot and Leaf are friends

Page 3: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.
Page 4: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Transpiration

Page 5: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Transpiration: water transport

The controlled release of water from a plant through stomata on the leaves resulting in movement of water from roots to leaves

1. Water evaporates from spongy mesophyll2. Creates low water pressure in leaves3. Roots absorb water by osmosis4. Creates high water pressure in roots5. Water moves from high to low pressure

• From root to leaf

Page 6: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Xylem Transport

• Water moves by a variety of forces– Cohesion:

• H-bonding to other water– Adhesion:

• H-bonding to walls of xylem– Capillary Action:

• Passive movement of water up through a narrow tube against gravity

– Transpiration pull: • suction pressure from leaves

Page 7: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.
Page 8: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Factors Affecting Rate of Transpiration

• Sunny – increased light intensity– Stomata open in presence of sunlight

• Warm – high temperature– Increased evaporation

• Dry – low humidity– Increase water vapor conc. gradient

• Windy– Removes established humid locations around

stoma

Page 9: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Regulation of Transpiration

• Guard Cells surrounding the stoma swell or shrink in response to the plants water needs.

• Up to 90% of water loss is through stoma• Amount of water loss depends on density of stoma and

their relative size.

Page 10: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Stoma close when guard cells lose water

• Flaccid state: K+ ions are transported out of the cell, water follows by osmosis

• Turgor state: K+ ions are transported into guard cells, water follows by osmosis

Page 11: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.
Page 12: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Abscisic Acid

• Plant hormone produced by root in response to water deficiency

• Stimulates guard cells into flaccid state, stoma closed

Page 13: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Xerophyte Adaptations

• Metabolic machinery can withstand increased temperature

• Low stoma densities• Small, thick leaves (spines)– Reduces surface area to volume ratio

• Thicker cuticles• CAM physiology– C02 absorbed at night, not day

Page 14: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

• Explain the process of water transport in vascular plants from root to leaf.– Include tissues water moves through– Forces that influence water movement– Need for water movement

Page 15: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Phloem Transport• Phloem is composed of living sieve tubes

1. Sugars produced in leaves are actively pumped into sieve tubes

2. Water follows by osmosis3. Results in high pressure in phloem4. Sugars exit phloem in roots and branch tips5. Results in low pressure in phloem6. Phloem solution moves from high pressure area to low

• From leaf to root, root to leaf

• Translocation is the movement of a biochemical in phloem

Page 16: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.
Page 17: Vascular Plant Transport. Plant Transport Root need sugar Leaf make sugar Leaf need water Root have water Water go up Sugar go down Root and Leaf share.

Phloem Transport