Boucher N L, Malajczuk N
Division of Forestry and Forest Products, CDITO Private Bag, P.O. Wembley, Western Australia 6014.
New Phytol. 1990 Jan;114(1):87-91. doi: 10.1111/j.1469-8137.1990.tb00377.x.
Seedlings of Eucalyptus diversicolor P. Muell. I noculated with the ectomycorrhizal fungi Descolea maculata Bougher (two isolates), Pisolithus tinctorius (Pers.) Coker & Couch and Laccaria laccata (Scop, ex Fr.) Berk. & Br. were raised under glasshouse conditions in a yellow sand at a gradient of four soil moisture levels ranging from above field capacity to near waterlogged. All fungi enhanced growth of seedlings above that of uninoculated seedlings, but in soils near saturation there was no response to inoculation. Reduced mycorrhizal formation in relation to increasing soil moisture occurred to various degrees for all fungi. This was particularly marked with Pisolithus tinctorius. In contrast, Laccaria laccata maintained a relatively high number of mycorrhizal roots at all moisture levels applied, except at the wettest soil treatment. An isolate of D. maculata from a swamp environment did not produce a greater number of mycorrhizal roots at high soil moisture than an isolate of this species from a forest environment.
用外生菌根真菌黄斑硬皮马勃（两种分离株）、彩色豆马勃和乳白红菇对接种的多枝桉幼苗在温室条件下种植于黄沙中，土壤湿度水平有四个梯度，从田间持水量以上到接近涝渍状态。所有真菌都促进了接种幼苗的生长，使其高于未接种幼苗，但在接近饱和的土壤中，接种没有反应。对于所有真菌来说，随着土壤湿度增加，菌根形成减少的情况不同程度地出现。这在彩色豆马勃中尤为明显。相比之下，除了在最潮湿的土壤处理中，乳白红菇在所有施加的湿度水平下都保持了相对较高数量的菌根根。来自沼泽环境的黄斑硬皮马勃分离株在高土壤湿度下产生的菌根根数量并不比来自森林环境的该物种分离株多。
