中文摘要：

通过温室盆栽接种试验,研究了蜜色无梗囊霉（Acaulospora mellea）、弯丝硬囊霉（Sclerocystis sinuosa）及二者混合接种（分别记为Am、Ss和Am-Ss）对喜树幼苗生长及喜树碱含量的影响。结果表明：丛枝菌根的形成促进了喜树幼苗的生长,菌根幼苗的生物量优于无菌根幼苗,混合接种Am-Ss的菌根幼苗显著高于无菌根幼苗和单接种的菌根幼苗。丛枝菌根形成影响了喜树幼苗的喜树碱代谢,菌根幼苗根、叶片和全株的喜树碱含量均显著高于无菌根幼苗,并且混合接种处理的喜树幼苗喜树碱含量最高。

英文摘要：

The present study investigated the effect of inoculation with Arbuscular mycorrhizal fungi on the growth and camptothecin （CPT） content in Camptotheca acuminata seedlings on under greenhouse conditions. Arbuscular mycorrhizal fungi were Acaulospora mellea （Am）, Sclerocystis sinuosa （Ss） and their mixed inocula （Am-Ss）. Results showed that the biomass of mycorrhizal seedlings was significantly higher than non-mycorrhizal seedlings, except Ss. And the biomass of mixed inoculated seedlings was significantly higher than non-mycorrhizal seedlings and the other mycorrhizal seedlings. Arbuscular mycorrhiza also changed CPT metabolism of C. acurninata seedlings. In roots, leaves and whole plant, CPT contents in mycorrhizal seedlings were significantly higher than non-mycorrhizal seedlings, and CPT content in mixed inoculated seedlings was highest.