The effect of temperature and water stress on laboratory germination of <i>Eucalyptus globulus</i> Labill. seeds of different sizes

Abstract

Germination rate and germination capacity of Eucalyptus globulus Labill. increased significantly with increasing temperature (13 to 33 C) for all seed sizes to an optimum at 28 C, then decreased. Biggest seeds generally germinated best at all temperatures. Germination was also very sensitive to water potential (0 to -0.75 MPa), with no germination occuring at potentials below -0.25 MPa.