Abstract
Arbuscular mycorrhizal (AM) fungi play an important role in the acquisition of phosphorus(P) by plants. The external hyphae of AM fungi function as an extension of plant roots and may downregulate related functions in the roots. It is not clear whether the ability of AM fungi to mineralize organicP affects root phosphatase activities. A pot experiment was conducted to investigate the effect of Funneliformis mosseae on soil organicP mineralization under phytate application and to explore root phosphatase activities, Puptake, and growth in Camellia oleifera Abel. The plants and their growth substrates were harvested 4 and 8months after planting. The results showed that organicP application had no effect on the total dry mass of nonmycorrhizal plants, but differences in dry mass under P application were observed in mycorrhizal plants in both harvests. Inoculation with F.mosseae increased soil acid phosphatase, phytase, and alkaline phosphatase activities and reduced the soil organicP content. Mycorrhizal plants had higher root activity, shoot and root P contents and root acid phosphatase and phytase activities than nonmycorrhizal plants irrespective of organicP application. In conclusion, AM fungi enhanced the mineralization of soil organicP and positively affect root phosphatase activities.
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