Effects of arbuscular mycorrhizal fungi and phosphorus on camptothecin content in Camptotheca acuminata seedlings

摘要

To study influence of arbuscular mycorrhizal (AM) fungi on camptothecincontent, three AM fungi [Glomus diaphanum Acaulospora mellea and Sclerocystissinuosa] were selected to infect the C. acuminata seedlings under 3 levels ofphosphorus (13, 53 and 113 mg/kg). The results showed remarkable interactionsbetween the AM fungi and P supply on camptothecin contents in roots, leaves and thewhole plant of C. acuminata seedlings. All P levels increased the colonization of C.acuminata seedlings with AM fungi and camptothecin contents in roots, leaves andthe whole plant. The influence of AM fungi and P supply on the distribution ofcamptothecin in plant organs was also investigated. The increase in camptothecincontent in roots associated to the mycorrhizal symbiosis was higher at low P supply.