Figure 3.

The chlorophyll content (A), photosynthetic rate (B), total biomass (C), the tiller number (D), and per tiller biomass (E) of Epichloë symbiotic (EI) and non-symbiotic (EF) plants under normal (CK), moderate drought (MD), and severe drought (SD) treatments, and liner linear regression (F) between photosynthetic rate and total biomass. Note: Different lowercase letters mean significant difference at p < 0.05 among three soil moisture treatments at the 0.05 level. The *, ** and *** mean significant differences between EI and EF plants at the corresponding water content at the 0.05, 0.01 and 0.001 levels, respectively.