Structure and Physiological Adaptations of Flowering Plants Part II

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Structure and Physiological Adaptations of
Flowering Plants Part II

• Chapter 31

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Chapter Overview

• Factors Involved in Water Transport
• How Stomata Open and Close
• Nutritional Requirements of Plants
• Transporting the Products of Photosynthesis

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Transporting Water

• How do we know the direction that water moves
  from roots?
• Is water pushed up by root pressure?
• Capillary Action Responsible?
• Transpiration-Cohesion Theory

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Review

• Three Tissue Systems in Plants?
• Parenchyma? Collenchyma? Sclerenchyma?
• Describe the Structure of the Leaf of a Vascular
  Plant (Macro/Micro)

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What is Root Pressure?

• Osmosis- what is it?
• Recall the function of the endodermis of roots!
• Is root pressure enough?
• 10 meter limit
• some plants have little root pressure
• cant account for rate

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Capillary Action

• Water has adhesive and cohesive properties

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Transpiration-Cohesion Theory

• What is transpiration?

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The Transpiration-Photosynthesis Compromise

• A Balanced Plant
• Desert Plants

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How do Stomata Open and Close?

• K ions pumped into guard cells, followed by
  chloride ions
• Abscisic acid helps control stomatal opening

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Nutritional Requirements of Plants (31-1)

• Nitrogen, Potassium, Calcium, Phosphorus,
  Magnesium, and Sulfur
• Chlorine, Iron, Manganese, Zinc, Copper, Boron,
  and Molybdenum

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Movement in Phloem
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Movement in Phloem

• Sugars move from sources to sinks
• Sugars move more quickly than could be explained
  by diffusion alone
• Pressure Flow Hypothesis

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How Can Sugar Get into the Phloem?

• Where is the sugar made?

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