Fig. 1.

Effects of arbuscular mycorrhizal (AM) symbiosis and drought stress on (A) leaf water potential, (B) relative water content, (C) stomatal conductance, (D) efficiency of photosystem II, (E) hydrostatic root hydraulic conductivity (RDW = root dry weight) and (F) relative apoplastic water flow in maize plants grown under conditions of experiment 1. Treatments are designed as uninoculated controls (C, open bars) or G. intrarradices-inoculated plants (Gi, black bars). Plants were cultivated under well-watered conditions (ww) or subjected to drought stress (ds). Bars represent means plus s.e. (n = 6). Means followed by different letters are significantly different (P < 0·05) as determined by Duncan's multiple range and LSD tests.