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The relationship between seed mass and (A) the median base water potential for germination (ψb50) and (B) time to 50 % germination (T50) at 0 MPa (water) for 14 pioneer species. Closed symbols refer to data from this current study, open symbols to data for Piper dilatatum, P. hispidum, P. marginatum and P. peltatum from Daws et al. (2002).
