For anyone curious about this magical process & wanting to learn more:

Plant exudates include saps, gums, latex, resin, and kino. Sometimes nectar is considered an exudate.Plant seeds exudate a variety of molecules into the spermosphere, and roots exudate into the rhizosphere; these exudates include acids, sugars, polysaccharides and ectoenzymes, and collectively account for 40% of root carbon. Exudation of these compounds has various benefits to the plant and to the microorganisms of the rhizosphere.