Leaf structure
Mindmap of leaf structure
- Created by: emily_w
- Created on: 01-05-14 14:07
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- Leaf Structure
- Stomata
- Guard cells
- have a nucleus and chloroplasts
- control opening and closing
- close to limit water loss
- water lost when open
- Purpose
- Allow gases in and out of the leaf for respiration
- open when plant needs air
- Oxygen from respiration diffuses into air when guard cells open
- Photosynthesis
- closing stops photosynthesis
- when open, air diffuses into spaces inside leaves
- Located in the lower epidermis, between guard cells
- away from sumshine
- stops it being blocked by rain/dust
- avoids dehydration
- Guard cells
- Leaf adaptions
- most are broad--large surface area for light
- chlorophyll to absorb light
- air spaces to allow CO2 to get to cells
- veins, bring water to cells
- Cuticle
- waterproof layer that decreases water loss
- upper epidermis area
- also gasproof
- Mesophyll
- also called the palisade layer
- palisade cells
- lost of chloroplasts for photosynthesis
- name of tissue layer
- directly beneath upper epidermis
- air spaces to allow CO2/oxygen to diffuse
- Stomata
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