Interactions between micro-organisms and plant roots
in the rhizosphere are a key determinant of plant productivity.
There is a two-way dialogue in which plants
manipulate the rhizosphere’s microbial community,
which, in turn, profoundly alters plant growth [1]. Plants
exude up to 11% of fixed carbon via their roots, including
both small organic compounds and those that act as
signaling molecules [2]. Carbon export on this scale
must have a significant impact on rhizosphere microorganisms,
leading to alterations in community structure
and function. The rhizosphere is an environment in
which there are co-evolved mutualistic relationships