Fig. 3From: Morphological and physiological responses of Heteropogon contortus to drought stress in a dry-hot valleyAboveground biomass (a) and root biomass (b) of Heteropogon contortus at different stages under four water levels. Values represent the means (n = 5) with standard error bars. The different letters above the bars indicate significant differences among the treatments at the same stage at P < 0.05Back to article page