Anoxia increases the GABA concentrations
in rice seedlings by up to 8 mmol g21 FW (Ref. 9.) GABA
concentrations of 6 to 39 mM have been documented in suspension
cells adapted to water stress2,10,11, and concentrations of ~0.1 mM
occur in root-bleeding sap during drought stress, a 230% increase12.