Gibson A, Bachelard E P
Department of Forestry, Australian National University, GPO Box 4, Canberra, ACT 2601, Australia.
Tree Physiol. 1986 Jun;1(1):57-65. doi: 10.1093/treephys/1.1.57.
Consistent germination of Eucalyptus sieberi L. Johnson seeds required a low vapor pressure deficit (< 5 x 10(-6) MPa) and a high matric water potential (> -5 x 10(-3) MPa). Eucalyptus sieberi seeds, under moist but less favorable conditions, were unable to germinate but underwent changes that enabled them to germinate more rapidly when suitable conditions occurred. Such pregerminative development was interrupted but not reversed by a dry period as long as eight months. This may explain how seeds of this species germinate successfully on the surface of exposed seedbeds subject to intermittent drying.
西贝桉（Eucalyptus sieberi L. Johnson）种子的持续萌发需要低蒸汽压亏缺（< 5×10⁻⁶兆帕）和高基质水势（> -5×10⁻³兆帕）。西贝桉种子在潮湿但不太适宜的条件下无法萌发，但会发生一些变化，使其在适宜条件出现时能够更快地萌发。这种萌发前的发育会被长达八个月的干旱期打断，但不会逆转。这或许可以解释该物种的种子如何在暴露的苗床表面成功萌发，而这些苗床会经历间歇性干燥。
