Figure 4. Root growth potential of E. globulus in response to drought hardening treatment. Variation of (a) Number of new roots longer than 1 cm (NNR) and (b) the average length of longest three roots (ARL) were evaluated during the time course of three different drought treatments (-0.2, -1.3 and -2.4 MPa). Error bars represent SE, (n = 20). Different letters between times indicate significant differences within each drought hardening treatment and asterix show significant differences between treatments at each measuring time (Tukey test, p ≤ 0.005).


Supported by UNESCO / MIRCEN network