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. 2008 Dec 19;103(5):757–767. doi: 10.1093/aob/mcn246

Table 1.

Correlations (r) between phenolic concentration (total phenolics and tannin activity, the latter measured as protein precipitation) and leaf toughness (measured as work-to-shear of a leaf strip and as specific work-to-shear)

Total phenolics
Tannin activity (protein precipitation)
Work-to-shear Specific work-to-shear Work-to-shear Specific work-to-shear
All species (n = 125, 96) 0·166 (0·060) 0·105 (0·236) 0·163 (0·065) 0·135 (0·126)
Australia
 Kwongan and woodland (n = 25, 19) 0·225 (0·280) 0·172 (0·410) 0·257 (0·215) 0·273 (0·187)
 Eucalypt forest understorey (n = 15, 12) 0·223 (0·424) 0·205 (0·464) 0·395 (0·145) 0·313 (0·256)
 Tropical rainforest (n = 19, 18) −0·280 (0·245) −0·117 (0·634) −0·229 (0·346) −0·150 (0·539)
New Caledonia (all species) (n = 66, 58) 0·343 (0·003) 0·245 (0·039) 0·321 (0·006) 0·230 (0·053)
 Dry forest (n = 22, 21) −0·022 (0·923) −0·128 (0·572) 0·098 (0·664) −0·037 (0·871)
 Rainforest (n = 27, 24) 0·497 (0·007)* 0·443 (0·018) 0·471 (0·012)* 0·387 (0·042)
 Maquis (n = 21, 20) 0·251 (0·272) 0·430 (0·052) 0·490 (0·024)* 0·538 (0·012)*

All data were log-transformed for analysis, except tannin activity. The associated P-values are given in parentheses, with significant values (P < 0·05) indicated in bold. An asterisk indicates significant correlations using phylogenetic independent contrasts. For n, the first value is the number of species, followed by the number of phylogenetic contrasts tested.