Differential aluminum tolerance and absorption characteristics in Pinus massoniana seedlings colonized with ectomycorrhizal fungi of Lactarius deliciosus and Pisolithus tinctorius

Abstract Plant tolerance to aluminum (Al) toxicity can be enhanced by an ectomycorrhizal (ECM) fungus through biological filtering or physical blockage. To understand the roles of ECM colonization in Al absorption with regard tolerance, Pinus massoniana seedlings were inoculated either Lactarius deliciosus (L.:Fr.) Gray isolate 2 Pisolithus tinctorius (Pers.) Coker et Couch 715 and cultivated acid yellow soil without 1.0 mM 3+ irrigation for 10 weeks. Biomass production, bioaccumulation transport colonized two fungi compared, three kinetics (pseudo-first order, pseudo-second order intraparticle diffusion) models used evaluate variances root capacity. Results show that both increased aboveground biomass P. seedlings, but L. was more effective than 715. Lower capacity, fewer available active sites decreased affinity boundary layer thickness , higher accumulation translocation contributed ECM-inoculated seedlings. These results advance our understanding mechanisms strategies plant Al-tolerance conferred inoculation will better enhance forest plantation ecosystem restoration acidic soils, particularly Southwest China similar soils worldwide.