Fig. 2From: Pollen limitation and resource limitation affect the reproductive success of Medicago sativa L.The mean seed set (mean ± SE) of M. sativa under pollen limitation treatments by one-way ANOVA with a Tukey-HSD test. Different letters show a significant difference at the 0.05-level. Vertical bars denote standard error. C control, NM non-manipulated, PA pollen additionBack to article page