[Effects of inoculation with arbuscular mycorrhizal fungi on AIPO4 uptake by Poncirus trifoliata].
With sand culture in greenhouse, this paper studied the effects of inoculation with arbuscular mycorrhizal (AM) fungi Glomus mosseae and G. versiforme on the utilization of insoluble phosphate AlPO4 (Al-P) by trifoliate orange (Poncirus trifoliata) seedlings. The results indicated that inoculation with AM fungi notably increased the dry matter, P content, and P absorption rate of P. trifoliata. The contribution of mycorrhiza, P uptake by plant and AM fungi, and the contribution of AM fungi in P uptake by P. trifoliata increased greatly with increasing Al-P level in the medium. Inoculation with AM fungi greatly increased the excretion of phosphatase, especially acid- and neutral phosphatase, from plant root and hyphae, but the excretion amount decreased with increasing Al-P level. The contribution of the fungi in P uptake by P. trifoliata was significantly positively correlated with the amounts of acid-, neutral-, alkaline-, and total phosphatase.
Liu
Jin-Fa
JF
Key Laboratory of Horticulture Plant Biology Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China. jinfa@webmail.hzau.edu.cn
Xia
Ren-Xue
RX
Wang
Ming-Yuan
MY
Wang
Peng
P
Ran
Qing-Qing
QQ
Luo
Yuan
Y
D000042:Absorption; D017607:Aluminum Compounds / Q000378:metabolism*; D004780:Environment, Controlled; D038821:Mycorrhizae / Q000254:growth & development / Q000502:physiology*; D010710:Phosphates / Q000378:metabolism*; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D018517:Plant Roots / Q000382:microbiology; D032104:Poncirus / Q000378:metabolism* / Q000382:microbiology*
D017607:Aluminum Compounds; D010710:Phosphates; D010744:Phosphoric Monoester Hydrolases; C012714:aluminum phosphate