FIGURE LEGENDS
Figure 1: The effect of high CO2 on the growth
of wild type peas and mutants defective either in strigolactone (SL)
synthesis (rms1 -2, rms5-3 ) or signalling
(rms3 -1 and rms4-1 ) for 7 days either under ambient
(400 ppm CO2; top row) or high (750 ppm
CO2; bottom row).
Figure 2: The effect of high CO2 on the stem
height and branching of the shoots of wild type peas and mutants
defective either in strigolactone (SL) synthesis (rms1 -2,
rms5-3 ) or signalling (rms3 -1 and rms4-1 ) grown
for 7 days either under ambient (400 ppm CO2) or high
(750 ppm CO2).
Figure 3: The effect of high CO2 on the stem
height and branching of the shoots of wild type peas and mutants
defective either in strigolactone (SL) synthesis (rms1 -2,
rms5-3 ) or signalling (rms3 -1 and rms4-1 ) grown
for 14 days either under ambient (400 ppm CO2) or high
(750 ppm CO2).
Figure 4: The effect of high CO2 on the fresh
weight (A ), dry weight (B ) and plant water content
(C ) of wild type peas and mutants defective either in
strigolactone (SL) synthesis (rms1 -2, rms5-3 ) or
signalling (rms3 -1 and rms4-1 ) grown for 28 days
either under ambient (400 ppm CO2) or high (750 ppm
CO2).
Figure 5: The effect of high CO2 on the growth
of wild type peas and mutants defective either in strigolactone (SL)
synthesis (rms1 -2, rms5-3 ) or signalling
(rms3 -1 and rms4-1 ). Plants were grown for 28 days
either under ambient (400 ppm CO2; bottom row) or high
(750 ppm CO2; top row).
Figure 6: The effect of high CO2 on stem height
(A ), shoot branching (B ) in wild type peas and mutants
defective either in strigolactone (SL) synthesis (rms1 -2,
rms5-3 ) or signalling (rms3 -1 and rms4-1 ) grown
for 32 days either under ambient (400 ppm CO2) or high
(750 ppm CO2).
Figure 7: The effect of high CO2 on the dry
weight of wild type peas and mutants defective either in strigolactone
(SL) synthesis SL synthesis (rms1 -2, rms5-3 ) or signalling
(rms3 -1 and rms4-1 ) grown for 32 days either under
ambient (400 ppm CO2) or high (750 ppm
CO2).
Figure 8: The effect of high CO2 on aphid
fecundity on wild type peas and mutants defective in strigolactone (SL)
signalling (rms3 -1 and rms4-1 ). A single pea aphid
nymph was placed on each 5-day old plant. Plants were then grown in air
or under high [CO2]. Aphid numbers per plant were determined 15 days
later. Ten replicates were performed for each SL mutant and wild type
under each [CO2] per experiment.
Figure 9: The effect of high CO2 and of aphid
infestation on the phytohormone levels of wild type peas and mutants
defective in strigolactone signalling (rms3 -1 andrms4-1 ).
Figure 10: A linear regression analysis of the relationship
between the number of aphids on each plant and the gibberellic content
of the plant. Of the variability in aphid fecundity, 18% can be
explained by the gibberellic acid concentrations measured (P = 0.0181).