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: [[Plant]]s produce a number of [[chemical]]s which have [[antiseptic]] or [[antibiotic]] properties.
: 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.
===References===
====AQA====
:[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 '']