HYBRID SYMBIOSIS. “Significant aspects of plant structure and function which contribute to intelligent plant behavior can be traced to early evolutionary relationships with pathogenic and symbiotic microorganisms and fungi. These plant innovations, including synaptic machinery, are a putative direct outcome of intelligent-like reciprocation between plants and microorganisms to achieve selfish and selfless goals.”
http://journal.frontiersin.org/article/10.3389/fcimb.2013.00044/full