Transmissions through time: the 2017 advent calendar
Day 5

Ant-tree communications

Sue Hartley demonstrates how some trees live in a symbiotic defence pact with ants.

Plants may seem passive and defenceless, but they have plenty of ways to fight off attackers. In this video Sue Hartley demonstrates a gruesome strategy employed by a third of all tropical trees - maintaining an ant army to defend against herbivores and outcompete other plants.

Sue Hartley gave the 2009 CHRISTMAS LECTURES "The 300  million year old war". This clip is from her third lecture "Talking trees".