Diagram illustrating the custom-designed experimental unit (not in scale). (A) Chilli seeds were arranged in a circle around the adult plant sealed the central cylindrical box. (B) All seeds and adult plants within each unit were housed within 2 different sized square boxes, one inside the other, with the air in between the two boxes removed using a vacuum pump. This schematic representation has been adapted from .
Gagliano and Renton BMC Ecology 2013 13:19 doi:10.1186/1472-6785-13-19