Figure 5.
Abscisic acid (ABA) and sucrose synergistically inhibit Physcomitrella spore germination. (a) Effect of norflurazon on wild‐type (WT) spore germination. Five micromolar norflurazon has no further effect (data not shown). (b) Effect of 2 μM norflurazon on cps spores. (c) GA9‐methyl ester can rescue the inhibition of germination by ABA (GA, gibberellin). (d) Dose‐dependent inhibition of germination by sucrose. Sucrose was dissolved in BCD medium. (e) Synergistic inhibitory effect of ABA and sucrose on spore germination: an intermediate concentration of both ABA and sucrose was used; the 0.5% sucrose control also contains matched solvent. Error bars, ± SEM.