B3 - Plant nutrition summary
- Created by: Yumin LEE
- Created on: 24-02-19 22:15
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- Plant Nutrition
- Nutrition
- Plant & Animal
- Animal - cannot make their own food
- Plant - can make their own food by photosynthesis etc.
- Taking useful substance
- Organic
- Inorganic substance - light, carbon dioxide, water and minerals
- Organic - Substance made by living things
- Plant & Animal
- Photosynthesis
- Definition- the process by which plants manufacture carbohydrates from raw material
- Photo (light) / Synthesis (manufacture)
- Chlorophyll
- Green pigment which makes plant looks green
- Sunlight can be trapped by chlorophyll molecules
- Inside chloplast
- Chloroplast
- enzymes & chlorophyll
- Chloroplast
- light energy -> chemical energy
- Leaf structure
- appearence
- Lamina - main part of leaf
- Petiole - leaf stalk
- Transverse section
- upper part
- Cuticle - waxy cuticle, stops water evaporating
- Upper epidermis cell - do not contain chloroplast / Protecting the inner layer / secretes waxy cuticle
- Mesophyll layer
- Palisade mesophyll
- The cells nearer to the top of the leaf
- Containing Chloroplast (Photosynthesis)
- Arranged quite fence or palisade for photosynthesis from light
- Spongy mesophyll
- Arranged quite loosely
- For photosynthesisi from carbon dioxide
- Arranged quite loosely
- Palisade mesophyll
- Lower part
- Lower epidermis
- Stoma(ta)
- sausage shaped
- can open or close the hole
- Gas exchange => Carbon dioxide diffuses in & Oxygen diffuses out
- containg chloroplast
- Stoma(ta)
- Lower epidermis
- Vascular bundle
- Xylem (vessel) - carrying food
- Phloem (tube) - carrying away sucrose and other substance that the leaf has made
- upper part
- appearence
- Leaf adaptation
- Carbon dioxide
- 0.04% in the atomsphere - efficient at absorbing
- Stomata
- Large surface area
- Mesophyll layer
- arranged quite loosely
- diffuses well
- arranged quite loosely
- 0.04% in the atomsphere - efficient at absorbing
- water
- From the soil / by osmosis
- Root cap / Root hair
- Xylem vessel - within short distance
- to supply water to the all cells
- From the soil / by osmosis
- Sunlight
- Flat surface
- obtain sunlight
- thin surface
- sunlight to pentrate right through it
- to reach all the cells
- Arranged palisade cell
- To get sunlight as possible
- Supported by stem and petiole
- to expose as much as possible to the sunlight and air
- Flat surface
- Phloem tube within short distance of every mesophyll cell
- to take away organic products of photosynthesis
- Carbon dioxide
- Definition- the process by which plants manufacture carbohydrates from raw material
- Nutrition
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