香港次生林下植物菌根的调查

Investigation of plant mycorrhizae in secondary forests of Hong Kong

本文报道了香港６４种野生植物根系天然感染菌根菌的状况：９８．４％的植物都不同程度地感染上了菌根菌，９８．１％的根样发现受内生菌根（ＶＡＭ）的感染，其中小叶青冈（Ｑｕｅｒｃｕｓｍｙｒｓｉｎａｅｆｏｌｉａ）同时受外生菌根（ＥＣＭ）和内生菌根的感染。该研究揭示了香港次生林植物在自然条件下受菌根菌感染的普遍性，为进一步探讨华南地区菌根与退化地区植物群落演替的关系提供了重要的本底资料。

The root infections of 64 native species by mycorrhizal fungi in secondary forests were examined. The results showed that 98.4% of the tested species were more or less infected by mycorrhizal fungi. Infection by VAM fungi were found in 98.1% of the root samples. Of these, Quercus myrsinaefolia was found being infected by both ECM and VAM fungi.The result revealed universality of mycorrhizae in secondary forest of Hong Kong.It provided an important background information for further study on the ecological function of mycorrhizae in rehabilitation of secondary forest in degraded areas of South China.