Differential Effects of Rhizobacterial Strain and Dose on the Ectomycorrhizal Colonization of Loblolly Pine Seedlings

摘要

Loblolly pine seed were inoculated at sowing with one of four plant growth-promoting rhizobacteria (PGPR) strains at four different rates both in the nursery and in the greenhouse. Seedlings were harvested at 4,8, and 12 wk after sowing in the greenhouse and at 5,10, and 15 wk After sowing in the nursery. Ectomycorrhizae colonization, estimated as the total number ectomycorrhizal Roots per seedling and averaging by gram root biomass, were not evident on any treatment at either 5 wk in the nursery or 4 wk in the greenhouse.