L16 Photosynthesis I

L16 Photosynthesis I - ReviewofLecture15...

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Review of Lecture 15 Transport in Plants II: Chapter 10 1. Characteristics of Water 2. Water Potential 3. Plant Nutrition 4. Soil Characteristics and Nutrient Acquisition 5. Mutualistic Associations
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Overview of Water and Solute Transport Chap.10, pg.220
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Transpiration The  design of xylem tissues  and the  polar nature of water  facilitate transport of water  upward through the plant Chap.10, pg.222
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Chap.10, pg.226 Pressure flow in Sieve-tube Members
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Plant Require 17 Essential Elements 1. Plant require 17 chemical elements ( macronutrients  or  micronutrients) 2. Macronutrients are used in large am ounts for growth and  physiological processes 3. Micronutrients are usually necessary cofactors for enzym es  and are recycled by the plant 4. Deficiency sym ptom s are m anifested by plants that lack  one or m ore essential nutrients 5. Plants concentrate som e nutrients that they do not require  but are required by organism s that eat them   (Micronutrient  malnutrition (selenium, chromium and fluoride) afflict more than 40% of the world’s people and often  reflect deficiencies for those minerals in the soils of that region)  
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Soil, Minerals and Plant Nutrition 1. Plants obtain the minerals they need from the soil  ( plants need 17 essential elements ) 2. Minerals are taken up with water and are  transported through the xylem 3. Soil is made up of ground-up particles of rocks 4. Soil particles are  negatively charged  and bind  water and minerals   
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Binding Properties of Soil 1. Soil particles display negative  charges and therefore water  forms rings around each particle 2. Mineral ions dissolve in the  water as cations (+ve) or anions  (-ve) 3. Some cations will bind directly to  the soil Soil particle + water + - - -   - - +
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The Role of Cation Exchange The displacement of mineral cations by H +   plays a role in normal uptake by roots  and is driven by  cation exchange Acidic soils, which occur in regions of  high rainfall, are often nutrient  poor for the sam e reason CO 2  + H 2 H 2 CO H +  + HCO 3 - Carbonic acid bicarbonate Chap.10,pg.230
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Soil Bacteria Regulate Soil Nitrogen Chap.10, pg.231
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Formation of Root Nodules Chap.10, pg. 232
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The challenges 1. Harvesting light energy 2. Staying wet when things get dry 3. Dealing with gravity 4. Divide or be conquered  5. Leveraging resources
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Outline of Lecture 16 Photosynthesis I: Chapter 8 1. Two Series of Reactions 2. Pigments and the visible spectrum 3. The Photosystems 4. Other Photosystems 5. The Z-scheme 6. Chemiosmosis
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Photosynthesis 1. Photosynthesis makes the basic organic molecules a  plant needs to survive, grow and reproduce 2. Non-photosynthetic organisms ( heterotrophs ultimately depend on photosynthesis for life 3. Photosynthetic plants are  photoautotrophs
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This note was uploaded on 12/23/2010 for the course BIOL 120 taught by Professor Chuong during the Spring '09 term at Waterloo.

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L16 Photosynthesis I - ReviewofLecture15...

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