车八岭国家级自然保护区不同植被群落建群种的菌根

报道了广东车八岭国家级自然保护区原生性阔叶林、次生性阔叶林、马尾松林及次生草坡等４种植物群落中２０种植物的菌根感染率和土壤中内生菌根菌孢子的分布状况，除了２种植物；荒萁和瘟氏柿外，１８种植物均可与真菌形成内生型或外生型菌根菌孢子的４种斗科植物和马尾松具有外生菌根，其它１３种植物具有丛生－泡囊型内生菌根，外生菌根菌子实体在以壳斗科植物为优势种的原生性次生林中较多且种类丰富，在松林和次生阔叶林有少数种

Mycorrhizas of the Dominant Species in Four Plant Communities of Chebaling National Nature Reserve

Mycorrhizal associations of twenty plant species in four different plant communities of the Chebaling National Nature Reserve were investigated in the summer from 1995 to 1998. Except for two species (Dicranopteris linearis and Diospyros tsangii), eighteen species examined were associated with either vesicular-arbuscular mycorrhiza (VAM) or ectomycorrhiza (ECM). Four species of Fagaceae and Pinus massoniana were consistently associated with ECM while other thirteen species were associated with VAM. The fruiting bodies of ectomycorrhizal fungi were abundant and diverse in intact forest dominated by Fagaceae. Only a few species of macrofungal bodies were found in the pine dominated forest and secondary broad-leaved forest and none were seen in grassland during the study. VAM spore density was generally lower in the grassland than other community types. It is possibly due to degradation in floristic composition and soil fertility.