Correlations of glucose yields from enzymatic saccharification for eight Salix genotypes. Glucan accessibility from mature field-grown (Rothamsted Research site – RRes) trees correlated against glucan accessibility from: A control pot-grown trees and B reaction wood induced pot-grown trees. Glucan accessibility expressed as grams of glucose release per gram of glucan present in the biomass. Correlation coefficients and significance level displayed. Error bars represent standard error (n = 3 trees).