The Leaf Mass Fraction (LMF) is the fraction of total plant dry mass that is invested in leaves.
The units used in this analysis are g/g.
Considerations about calculations of biomass allocation parameters are given in Poorter & Sack (2012). Latest doseresponse curves are given in Poorter et al. (2012). 
Response curves 




Response curve parameters 
Environmental Factor  a  b  c  df  r2 
1. Irradiance  1.07402  0.87867  0.09911  1000  0.24*** 
2. R:FR  0.09451  0.10054    130  0.22 
3. UVB        60  0.00ns 
4. CO2  1.31508  1.07211  0.03305  700  0.02* 
5. O3  0.02673  0.00056    190  0.04 
6. Nutrients  0.36363  0.36179  1.54676  920  0.29 
7. Water availability        320   
8. Waterlogging  0.00  0.1498    110  0.10 
9. Submergence        60  0.00ns 
10. Temperature  0.17076  0.00795    300  0.10 
11. Salinity        180  0.00ns 
12. Soil Compaction        90  0.00ns 
If a and b are given, the response curve is of the form y = a + bx, where y is the log(2)transformed scaled trait, and x is the environmental parameter, with the units as given here. When c is given as well, the curve is of the form y = a + bx^c. The df is the degrees of freedom on which the curve is based, and r2 is the proportion of variance that is explained by the equation. 
Plasticity indices 
Environmental Factor  Plasticity index 
1. Irradiance  1.33 
2. R:FR  1.07 
3. UVB  1.00 
4. CO2  1.06 
5. O3  1.04 
6. Nutrients  1.28 
7. Water availability  1.00 
8. Waterlogging  1.11 
9. Submergence  1.00 
10. Temperature  1.18 
11. Salinity  1.00 
12. Soil Compaction  1.00 
The plasticity index is the ratio between the highest and the lowest value of the response curve over the full trajectory given here. Values in bold indicate a plasticity index > 1.5. Values in red indicate an LMF that decreases when the environmental parameter of interest increases. Values in blue indicates an increase in the trait value with an increase in the level of the environmental fctor 
Last updated: 05052014 