Table 3: Mole fraction of organic acids collected in root exudates of corn.

Organic acidMolecular weightMole fraction ratio

Acetic60.050.287
Butyric88.110.209
Glutaric132.120.004
Lactic90.080.366
Maleic116.070.042
Oxalic90.040.043
Propionic74.080.010
Pyruvic88.060.0004
Succinic118.090.006
Tartaric150.090.032
Valeric102.130.001