“…This increased per-cell nuclear DNA content, however, does not necessarily translate into higher whole-organism P concentration. For one, polyploids often have larger (and fewer) cells (Fankhauser, 1945;Benfey, 1999;reviewed in Mable, 2004), and smaller haploid genomes (Ozkan et al, 2003;Leitch and Bennett, 2004;Murray et al, 2005;Gerstein et al, 2006;Eilam et al, 2010;Pellicer et al, 2010) relative to closely related taxa with lower ploidy. In addition, variation in RNA content may have more of an effect than variation in DNA content on body P content because RNA (1) makes up a substantial fraction of organismal biomass (415% dry mass in some animals and 440% dry mass in bacteria; Elser et al, 1996Elser et al, , 2003 and (2) varies considerably among taxa (for example, %RNA ranges from o1% to 413% dry mass in zooplankton (Gillooly et al, 2005)).…”