- 0.25 MPa), and I. edulis the smallest (psiPD = - 1.5 MPa). J. princeps showed higher water potential values during the day (psiMD > - 1.5 MPa) and lower values were observed for S. macrophylla and I. edulis (psiMD < - 3.0 MPa). The daily amplitudes of the water potential ( = psiPD - psiMD) were positively related with the vapour pressure deficit (VPD), and the largest values were observed in S. macrophylla and I. edulis. The conductance usually decreased in the beginning of the afternoon, and I. edulis presented smaller restriction to the transpiration. The largest conductance values were observed in a cloudy day of the rainy season. A quadratic regression (r² = 0.635, p < 0.01), suggests that species with larger density not necessarily present larger , once a great restriction to the loss of water can happen as observed for L. tomentosa, a species with high wood density.]]>
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