Difference between revisions of "Plant Defences Against Micro-Organism"
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*Cell Walls - The [[Cell Wall|cell walls]] of individual [[Cell (Biology)|cells]] can act as a barrier to [[virus]]es entering the [[Cell (Biology)|cells]]. | *Cell Walls - The [[Cell Wall|cell walls]] of individual [[Cell (Biology)|cells]] can act as a barrier to [[virus]]es entering the [[Cell (Biology)|cells]]. | ||
| − | ===Chemical Barriers=== | + | ====Chemical Barriers==== |
: [[Plant]]s produce a number of [[chemical]]s which have [[antiseptic]] or [[antibiotic]] properties. | : [[Plant]]s produce a number of [[chemical]]s which have [[antiseptic]] or [[antibiotic]] properties. | ||
| − | : When [[plant]]s become distressed they give off | + | : When [[plant]]s become distressed they give off pheromones which cause nearby [[plant]]s to also produce [[antiseptic]] and [[antibiotic]] [[chemical]]s, preventing [[pathogen]]s from spreading. |
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| + | ===References=== | ||
| + | ====AQA==== | ||
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| + | :[https://www.amazon.co.uk/gp/product/1782945563/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945563&linkCode=as2&tag=nrjc-21&linkId=9a1d023a374038e6072f33c4f3cf808b ''Defences (of plants), page 55, GCSE Biology; The Revision Guide, CGP, AQA ''] | ||
Latest revision as of 23:42, 3 November 2019
Contents
Key Stage 4
Meaning
Plant defences against micro-organisms are the methods plants have to reduce the chance of infection and fight disease causing pathogens.
About Plant defences against micro-organisms
- Plant defences against micro-organisms can be grouped into two main categories: Physical Barriers and Chemical Barriers.
Physical Barriers
- Waxy Cuticle - Leaves have a waxy cuticle which can prevent micro-organisms from entering the leaf.
- Bark - A layer of dead cells surrounds the outside of a tree trunk which blocks micro-organisms form getting into the stem.
- Cell Walls - The cell walls of individual cells can act as a barrier to viruses entering the cells.
Chemical Barriers
- Plants produce a number of chemicals which have antiseptic or antibiotic properties.
- When plants become distressed they give off pheromones which cause nearby plants to also produce antiseptic and antibiotic chemicals, preventing pathogens from spreading.