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FIG. 2.
Isotopic discrimination by C. volvatus (Cv)
and M. androsaceus (Ma) grown in closed liquid cultures on
either C3- or C4-derived sucrose. Solid bars,
medium; diagonally cross-hatched bars, fungal biomass; horizontally
cross-hatched bars, CO2. See the text for the definition of
. See Table 1 for mass balance data. The difference between biomass
and CO2 was significant only for C. volvatus
grown on C4 sucrose (t test; P = 0.032). The b
f values are significantly
different from a hypothesized value of 0.00
only for C3
treatments (t test; P < 0.01).
